Diamond-shaped Research Articles

Deposition of diamond films by microwave plasma CVD on 4H-SiC substrates

Diamond films were deposited on 4H-SiC substrates by microwave plasma chemical vapor deposition (MPCVD). The substrate pretreatment method of electrostatic adsorption of seed crystals by nanodiamond suspensions was used, and the nucleation density of diamond on the substrate surface reached 1010/cm2 compared with ultrasonic seed crystals of diamond micro-powder suspensions, and continuous dense diamond films were formed in a shorter growth time. Scanning electron microscopy and Raman spectroscopy were used to characterize the changes of diamond grain morphology and quality with methane concentration, deposition time and substrate temperature during the growth process. The experimental results show that the methane concentration, deposition time and substrate temperature are the key factors affecting the grain shape and quality of diamond. And the best quality of diamond film is obtained at 850 °C substrate temperature.

Circularly polarized metalens antenna design for 5G NR sub-6 GHz communication systems

5G NR (new radio) FR1 range refers to as Sub-6 GHz band (410–7125 MHz and 3.4–6 GHz). In this paper, the frequency range of interest is from 3.4 to 6 GHz, as many cellular companies are focusing on this Sub-6 GHz band. A wideband circularly polarized (CP) antenna radiator is designed with diamond shape patches, fed by a microstrip line at the bottom through a rectangular shape wide slot on a ground plane. The proposed CP antenna covering a −10 dB bandwidth of 21.52 % (5.0–6.3 GHz) with 3-dB axial ratio (AR) bandwidth of 12.48 % (5.1–5.8 GHz). Furthermore, a metasurface-based lens (metalens) is designed for gain enhancement and fed by 3 × 1 array of the proposed CP antennas for multibeam operation. The lightweight dual-layer metasurface structure consisting of circular shape unit cell elements are used to implement the lens. For the proof-of-concept, the array of radiating elements is implemented and experimentally validated, which gives a ±18° beam scanning range with a maximum gain of 13dBic at 5.6 GHz.

Cascade Energy Transfer and White‐Light Emission in Chirality‐Controlled Crystallization‐Driven Two‐Dimensional Co‐assemblies from Donor and Acceptor Dye‐Conjugated Polylactides

AbstractAchieving predictable and programmable two‐dimensional (2D) structures with specific functions from exclusively organic soft materials remains a scientific challenge. This article unravels stereocomplex crystallization‐driven self‐assembly as a facile method for producing thermally robust discrete 2D‐platelets of diamond shape from biodegradable semicrystalline polylactide (PLA) scaffolds. The method involves co‐assembling two PLA stereoisomers, namely, PY‐PDLA and NMI‐PLLA, which form stereocomplex (SC)‐crystals in isopropanol. By conjugating a well‐known Förster resonance energy transfer (FRET) donor and acceptor dye, namely, pyrene (PY) and naphthalene monoimide (NMI), respectively, to the chain termini of these two interacting stereoisomers, a thermally robust FRET process can be stimulated from the 2D array of the co‐assembled dyes on the thermally resilient SC‐PLA crystal surfaces. Uniquely, by decorating the surface of the SC‐PLA crystals with an externally immobilized guest dye, Rhodamine‐B, similar diamond‐shaped structures could be produced that exhibit pure white‐light emission through a surface‐induced two‐step cascade energy transfer process. The FRET response in these systems displays remarkable dependence on the intrinsic crystalline packing, which could be modulated by the chirality of the co‐assembling PLA chains. This is supported by comparing the properties of similar 2D platelets generated from two homochiral PLLAs (PY‐PLLA and NMI‐PLLA) labeled with the same FRET pair.

Cascade Energy Transfer and White-Light Emission in Chirality-Controlled Crystallization-Driven Two-Dimensional Co-assemblies from Donor and Acceptor Dye-Conjugated Polylactides.

Achieving predictable and programmable two-dimensional (2D) structures with specific functions from exclusively organic soft materials remains a scientific challenge. This article unravels stereocomplex crystallization-driven self-assembly as a facile method for producing thermally robust discrete 2D-platelets of diamond shape from biodegradable semicrystalline polylactide (PLA) scaffolds. The method involves co-assembling two PLA stereoisomers, namely, PY-PDLA and NMI-PLLA, which form stereocomplex (SC)-crystals in isopropanol. By conjugating a well-known Förster resonance energy transfer (FRET) donor and acceptor dye, namely, pyrene (PY) and naphthalene monoimide (NMI), respectively, to the chain termini of these two interacting stereoisomers, a thermally robust FRET process can be stimulated from the 2D array of the co-assembled dyes on the thermally resilient SC-PLA crystal surfaces. Uniquely, by decorating the surface of the SC-PLA crystals with an externally immobilized guest dye, Rhodamine-B, similar diamond-shaped structures could be produced that exhibit pure white-light emission through a surface-induced two-step cascade energy transfer process. The FRET response in these systems displays remarkable dependence on the intrinsic crystalline packing, which could be modulated by the chirality of the co-assembling PLA chains. This is supported by comparing the properties of similar 2D platelets generated from two homochiral PLLAs (PY-PLLA and NMI-PLLA) labeled with the same FRET pair.

Numerical investigation on the high-velocity impact resistance of textile reinforced composite mesh designs inspired by spider web

The need for thin and highly deformable textile reinforcements is constant in sectors like thin composites, catching nets, and complex construction designs (like dome-shape). The conventional rectangular-patterned meshed wovens are used in thin composite structures as reinforcement at the commercial level. These woven textiles are bidirectional and exhibit approximately the same strength along both axes. However, these conventional rectangular-patterned mesh designs show poor impact stress distribution capacity. Interestingly, very thin and fine mesh designs are available in nature. One such example is the spider web structure. These structures have evolved with time and optimised their mesh pattern design for better impact damage resistance and load transfer. In this study, the basalt fibre reinforced mortar textile composites are considered for the investigation due to their growing interest in civil and construction applications. To demonstrate how the mesh geometry in textiles significantly influences the stress transfer, energy absorption, and deformation of reinforcements under various impact situations, three different geometries, (a) square shape mesh, (b) diamond-shaped mesh, and (c) bio-inspired spider web mesh, are modelled and meshed based on the reference geometry’s meshing pattern and dimensions. The results of numerical simulations show that a meshed reinforcement design inspired by spider-orb-web has improved mechanical features compared to conventional square and diamond shape mesh designs under high velocity impact loading.

The Art of Scientific Observation: an art-science project on the legacy of Barbara McClintock

Abstract We explore a facet of the scientific method of the Nobel Laureate Barbara McClintock through an artistic process. McClintock’s key scientific insights that she coined the ‘breakage-fusion-bridge cycle’, rest on her observation of maize kernel colors and forms together with the spatial arrangement of chromosomes. These intriguing studies motivated the art project ‘break-fusion-bridge-cycle’ to highlight the role of visual observation in discovery. Four different posters bear irregular diamond shapes with forms reminiscent of X-chromosome shapes and color patterns of the kernels McClintock studied and are inscribed with the words break, fusion, bridge, and cycle using a font type inspired by her drawings of chromosomes. As freely available posters, anyone can experiment with the spatial arrangement of shapes and colors, to reflect on one’s own ability to observe, to make connections and create new insights.

Effect of unit cell shape and structure volume fraction on the mechanical and vibration properties of 3D printed lattice structures

Lattice structures have been proven to be one of the best choices since their inception, for various structural and other commercial applications, for enhanced mechanical properties, especially in the case of vibration isolation, where band gaps play a vital role. In the present study, additively manufactured 3D printed lattices are prepared with the help of fused deposition modelling (FDM) under various design variations such as Diamond, Kelvin, and Octa formations. Further, three variations in the form of cell density have been used in all the designs, such as low, medium, and high density. The effect of the design variations on Young’s modulus, ultimate compressive strength, and plateau stress have been studied, and comparative analysis amongst the designs has been carried out. In the case of the diamond foam, the Young’s modulus of 54.84, 79.43, and 63.13 MPa has been obtained for low, medium, and high density, respectively. However, in the case of Octa formation with a high-density apology, highest value of young modulus is obtained, which is 174.94 MPa. But the plateau stress is the best in the case of high-density diamond topology and least in the case of high-density Octa formation. In addition, the diamond foam with the medium density has shown the best compressive strength, i.e., 5.003 MPa. Moreover, vibration analysis properties were explored; interestingly, it has been seen that the transmissivity of the medium-form structures for all shapes is higher than the others whereas the natural frequency of the Diamond and Octa shapes is lower. Hence the shape and form of the lattice have a significant effect on the final properties of the lattices and lattice structures contribute to structural integrity in terms of better properties and enhanced behaviour.

Investigating the mechanical properties of perfect and defective Ψ-graphene: A molecular dynamics simulation

Molecular dynamics simulation is used here to study the mechanical properties of perfect and defective ψ-graphene. For this purpose, the defect is applied as circle, square, diamond, and triangle shapes removed from the center of the nanosheets. Moreover, some atoms are randomly removed from the nanosheet to model a nanosheet with vacancy defect. The influence of the defect on the mechanical properties of the nanosheet is investigated. It is shown that elastic modulus of the defective ψ-graphene is smaller than the perfect one. However, the strain at which the nanosheet is ruptured increases by introducing the defect. Finally, the fracture process of the perfect and defective ψ-graphene is plotted.

Low-Loss Super-Wide Band Antenna over Customized Substrate

In this work, a super wide band antenna is proposed to operate in the frequency band 2.3-23 GHz. The antenna has two planar arms with a modified diamond shape printed on the opposite faces of three-layer dielectric substrate. Each arm of the antenna is capacitively coupled to circular sector near its end to increase the impedance matching bandwidth. The dielectric substrate is customized to fit the shape of the antenna arms and the parasitic elements to reduce the dielectric loss. The substrate material is composed of three layers. The upper and lower layers are Rogers RO3003TM of 0.13 mm thickness and the middle layer is made of paper of 2.3 dielectric constant and 2.7 mm thickness. The antenna is fed through a wide band impedance matching balun. The antenna design stages are performed through electromagnetic simulations concerned with the parametric study to get the optimum antenna dimensions to numerically investigate the role of the parasitic element to enhance the antenna performance. A prototype of the proposed antenna is fabricated to validate the simulation results. The experimental measurements come in good agreement with the simulation results and both of them show that the antenna operates efficiently over the frequency band 2.3-23 GHz with minimum radiation efficiency of 97% and maximum gain of 5.2 dBi. The antenna has bandwidth to dimension ratio (BDR) of 1360.

Impact of web perforation size and shapes on structural behavior: a finite element analysis

Purpose Various designs of corrugated webs include trapezoidal, sinusoidal, triangular and rectangular profiles. The increasing use of curved plates has prompted the creation of I-sections made of steel with a corrugated web design. This study aims to examine the effectiveness of an I-beam steel section that features a perforated-triangular web profile. Design/methodology/approach In the current study, finite element analysis was conducted on corrugated-perforated steel I-sections using ANSYS software. The study focused on inspecting the design of the perforations, including their shape (circle, square, hexagon, diamond and octagon), size of perforations (80 mm, 100 mm and 120 mm) and layout (the position of web perforation), as well as examining the geometric properties of the section in term of bending, lateral torsional buckling, torsion and shear behavior. Findings The study revealed that perforations with diamond, circle and hexagon shapes exhibit good performance, whereas the square shape performs poorly. Moreover, the steel section’s performance decreases with an increase in perforation size, regardless of loading conditions. In addition, the shape of the web perforations can also influence its stress distribution. For example, diamond-shaped perforations have been found to perform better than square-shaped perforations in terms of stress distribution and overall performance. This was because of their ability to distribute stress more evenly and provide greater support to the surrounding material. The diagonal alignment of the diamond shape aligns with principal stress directions, allowing for efficient load transfer and reduced stress concentrations. Additionally, diamond-shaped perforations offer a larger effective area, better shear transfer and improved strain redistribution, resulting in enhanced structural integrity and increased load-carrying capacity. Originality/value Hence, the presence of lateral-torsional buckling and torsional loading conditions significantly impacts the performance of corrugated-perforated steel I-sections.

Improving the performance of indirect evaporative cooler for energy recovery from the perspective of nozzle configuration: A CFD model analysis

As a sustainable cooling technology, indirect evaporative cooling (IEC) has been widely recognized as an effective means of achieving carbon neutrality based on its low energy consumption and high efficiency in central air conditioning (AC) systems of buildings. In contrast to the conventional arrangement, IECs as heat recovery units are often arranged in a diamond shape inside the air handling units (AHUs) of data centers (DCs), an approach that facilitates the flexible use of space and integration within the units in a more compact form. The use of CFD simulations allows an integrated analysis of the coupling of hydrodynamic, thermal and mass properties helps to improve the evaporation performance of IECs. In this study, a 3D simulation model of a diamond-shaped IEC containing the water spray system was developed to compare and analyze the air-water arrangement options in IEC systems currently used in DCs, and the corresponding characteristics are explored from the perspective of CFD techniques to determine the effect of nozzle configurations on the formation and evaporation of water film within the wet channels. Then, parametric analysis of nozzle setup schemes based on performance metrics showed that the nozzle arranged in top-side configuration and paired with the air-water counterflow form had the best performance, with 59.2% and 27.4% improvement in water film coverage area and temperature drop, respectively, over the worst scheme (bottom configuration) at a water supply flow rate of 65 L/s. Finally, the effectiveness of the enhanced approach was simulated and analyzed for hydrophilic and fiber coatings, and it was found that the water film coverage increased by 14.5% and 31.6%, respectively, while the coefficient of performance (COP) increased by 7.4% and 16.1%.

Effects of B-NiS co-doping on diamonds growing along {1 1 1}-orientation under high pressure and high temperature

Large single diamonds were successfully synthesized from NiS or B-NiS co-doping FeNi-C system under high pressure and high temperature (HPHT) in this paper. In this study, the effects of different additive amounts of NiS doping alone or B-NiS co-doping on the crystal shape, color and quality of diamond were investigated. The color of NiS doped diamonds change from bright yellow to bright green and then to grayish yellow. The color of B-NiS co-doped diamonds change from yellowish green to grayish green and black. Besides, the shape of doped crystals gradually changes from plate to tower. Fourier transform infrared (FTIR) spectra shows that with the increase of additive NiS content, the entry of nitrogen is suppressed to some extent by the entry of S into the diamond lattice, while with B-NiS co-doping, the content of nitrogen impurities increase with the increase of B content. It can be found from the x-ray photoelectron spectroscopy (XPS) results that the obtained diamonds contain B/S/N elements, with S present in the diamond lattice in the form of C–S–O. Raman measurements show that with increasing B content, the peak positions of co-doped diamonds are shifted and the full width at half maximum (FWHM) become slightly larger, but still have a high quality sp3 structure. This study not only contributes to the investigation of the formation mechanism of natural diamond, but also has important implications for the enrichment of diamond species and the expansion of synthetic diamond applications.

Nonsurgical Rhinoplasty: Diamond Injection Technique for Nasal Tip Contouring.

Background: A more pleasing nasal tip appearance is becoming the most frequent reason for nonsurgical aesthetic rhinoplasty procedures. Objective: To present the "Diamond Injection Technique," an innovative 4-point hyaluronic acid (HA) filler injection procedure for nasal tip refinement and to assess its aesthetic outcomes and efficacy. Methods: Data were collected from a prospective single-center cohort of patients undergoing nonsurgical rhinoplasty with injectable fillers. Anthropometric measurements, the 5-point Global Aesthetic Improvement Scale (GAIS), and a patient-reported questionnaire were used to evaluate the aesthetic outcomes and treatment efficacy before treatment and 6 months later. Results: The study included 107 patients; 82 were women. The median age was 35 (18-47) years. The mean volume of HA filler injected was 0.12 mL (range: 0.05-0.2). At 6 months, the GAIS-calculated outcome was excellent in 90.65% of patients, with a high degree of patient satisfaction and objectively pleasant changes in anthropometric measurements. Conclusions: The "Diamond Injection Technique" proves to be a safe, comprehensive, and effective procedure for refining the nasal tip to a pleasing diamond shape, satisfying a high percentage of patients.

Graphene-based diamond-shaped solar absorber using Fe–SiO2–Fe structure for UV to MIR region

Graphene based solar absorbers are gaining interest because of excellent optical properties of the material. We construct the perfect solar absorber in a diamond shape based on graphene. In this proposed design, the SiO2 substrate layer is sandwiched between the two Fe layers. The graphene layer is also inserted between Fe and SiO2 layers to improve the absorption of the design. The absorption rates can be studied in the four regions starting ultraviolet (UV) to mid-infrared region (MIR) between 0.2 and 3 μm. The total average solar absorption percentage from UV to MIR is 93.53%. The amount of solar absorption is more than 90% with a bandwidth range of 2800 nm. Also, the solar absorption reaches above 95% with a bandwidth of 900 nm and over 97% at an appropriate bandwidth of 930 nm. Solar absorption can be studied by the parameter variations by changing the width and thickness of a Fe ground layer, the thickness of SiO2 substrate and Fe resonator layers, and the chemical potential changes. Moreover, the solar absorption changes in TE and TM by varying the polarization from 0 to 80°. Furthermore, the electric field intensity can be found with the respective color plot in different ranges. Finally, we can compare our proposed diamond-shaped graphene-based solar absorber to the other published works.

Calculations of Self- and Mutual Inductances for Racetrack Coils Using Equivalent Models

This paper presents the calculations of self and mutual inductances for thin racetrack coils using a novel approach. Approximate rectangular and diamond shape models for racetrack coils are used for the analysis with the same cross-sectional area and circumference as the racetrack coils. A 3D analytical method using separation of variables method and Fourier series is developed for the magnetic fields analysis and calculation of self and mutual inductances for thin racetrack coils. The analytical method utilizes magnetic vector potential with two components to solve Maxwell differential equations. Different racetrack coils with different dimensions are considered for the validation of analytical modeling for the inductance calculations. The inductance calculations of circular coils are also presented as special cases for racetrack coils. The approaches for the mutual inductance calculation of racetrack and circular coils could be utilized for wireless power transfer and charging applications.

“4+2” axis ultra-precision diamond shaping for partially overlapping Fresnel lenses based on an ultra-precision machine tool and two additional rotational axes

Optical surfaces and microstructures with high form accuracy and excellent surface quality are widely utilized nowadays and the diamond machining technology is still preferable for the fabrication of these workpieces. However, when machining surfaces featuring a high aspect ratio or intricate microstructures like monolithic microstructural optics, the machining efficiency is quite low and the cutting tool interference is inevitable for the existing diamond turning techniques. Hence, a novel method is proposed to machine such microstructures by introducing two additional rotational motions into the traditional ultra-precision machine tool. In this way, the arbitrary adjustment of the tool posture may be achieved in the machining process and intricate microstructures like monolithic microstructural optics can also be machined by the side cutting edge with high efficiency. The whole mechanical system and machining principle are presented firstly. Next, the tool path planning and the compensation for the tool tip offset are introduced. Then, the partially overlapping Fresnel lens array consisting of two segmented Fresnel lenses are fabricated and inspected. Finally, the measurement data are analyzed and the proposed method is validated to be able to fabricate such complex microstructures with high profile accuracy and surface quality successfully.

PO-01-045 INJURY TO THE LEFT INTERNAL THORACIC ARTERY DURING PERCUTANEOUS EPICARDIAL ACCESS FOR CATHETER ABLATION: PREVENTION AND MANAGEMENT

Damaging the left internal thoracic artery (LITA) is considered to be a possible complication of percutaneous epicardial catheter ablation. The LITA typically courses approximately 1cm from the sternal margin and bifurcates around the sixth intercostal space and may be located in the epicardial needle trajectory. However, reports of this complication are scarce. We report two cases of epicardial ablation: one with an uncommon LITA injury complication during epicardial access (EA) and another showing its preventive measures. N/A Case 1. A 39 year-old man with Brugada syndrome underwent epicardial catheter ablation. Since the initial EA from the subxiphoid region failed, we alternatively performed a parasternal intercostal EA at the fifth intercostal space 2cm from the sternal margin and placed a guidewire in the pericardial space. Shortly after the puncture needle was removed, we observed active bleeding from the puncture site and a drop in the blood pressure. We replaced the guidewire with an 8F drainage catheter and removed the arterial blood from the pericardial space, which stopped the bleeding and stabilized the blood pressure. The arteriography revealed a penetration of the LITA by the drainage catheter (Fig 1A). We secured the pericardial space with a second guidewire (GW2) inserted from an adjacent site. Then, we performed a percutaneous coil embolization of the LITA (VortX™ 18 Diamond Shape Fibered Platinum Coils, Boston Scientific). During the procedure, when the drainage catheter was removed, we confirmed the extravasation of the contrast medium from the injured site (Fig 1B). Finally, hemostasis was achieved (Fig 1C). A sheath was advanced into the pericardial space with a GW2 and the epicardial catheter ablation was successfully performed (Fig 1D). No blood transfusion was required. Case 2. A 25 year-old man with Brugada syndrome underwent epicardial catheter ablation with a subxiphoid anterior EA. Bi-plane angiography performed prior to the EA clearly delineated a tortuous and branching LITA (Fig 1E). The EA was securely obtained with the on-site anatomical information. Case 1 demonstrated direct evidence of a LITA injury occurring during an EA. Angiography immediately before an EA can visualize the detailed LITA anatomy and may ensure safety during a subsequent EA. If a LITA injury occurs, a coil embolization of the LITA may be a feasible and effective treatment.

The capability of square-meshes and fixed-shape meshes to control codend size selection

Trawl codends are commonly made of diamond-mesh netting. However, diamond-mesh codends vary in mesh geometry along its length and during fishing due to catch build up. This introduces variability in the size selection process. This phenomenon compromises the rationality of regulating exploitation patterns in trawl fisheries through adjustments in codend mesh size. One technical solution often applied to achieve more well-defined size selection is turning the codend netting 45 degrees (square-mesh). However, there is a lack of evidence that square-mesh codends result in more constant size selectivity. Therefore, we aimed at quantifying the variability in size selection in square-mesh codends. We tested the size selectivity of three codends; a standard square-mesh codend, and two rigid codends where mesh geometries were fixed in diamond shape with an opening angle of 60° and square shape, respectively. The two rigid codends were used to establish baselines with limited variability in size selection. The size selectivity of these codends was compared to results - previously obtained for a standard diamond-mesh codend. Using Atlantic cod (Gadus morhua) as a case study, we demonstrated that the standard square-mesh codend had significantly larger variability in size selection compared to the fixed diamond-mesh codend. Moreover, we found no evidence that the standard square-mesh codend had lower variability in size selection than a standard diamond-mesh codend with same mesh size. These results demonstrate that the use of standard square-mesh codends is not sufficient to reduce variability in codend size selection. Additionally, we demonstrate that the sizes of fish retained is strongly dependent on mesh shape and openness. We conclude that a profound re-thinking over codend designs is required in order to achieve better control of size selection in trawl fisheries.

Study of effect of provision of cut-outs on axial collapse behaviour of circular aluminium tubes

Geometrical modification of thin-walled tubular structure is one of the innovative ways in the development for vehicle safety design. This research is developed in accordance with the need of investigation on behaviour of tubular structures with geometrical modifications like cut-outs under dynamic loading technique. Diamond and elliptical cut-out shapes are provided in multiple number arranged circumferentially in a single row on a tube surface. Tubes with cut-outs are loaded axially at three different velocities, corresponding to three different strain rates. Energy absorption characteristics like energy efficiency, specific energy absorption, peak collapse force, mean collapse force and efficiency of peak force reduction at the initiation of tube deformation are calculated and compared using finite element (FE) based ABAQUS/Explicit® software. Split-Hopkinson Pressure Bar (SHPB) is modelled in the FE software to understand the material behaviour under high strain dynamic loading. Johnson-Cook material model parameters are incorporated in the study to understand the strain rate sensitive behaviour of aluminium alloy material. Results revealed that providing diamond and elliptical cut-outs on tube is much efficient than providing circular cut-outs on tube, in terms of percentage peak load reduction as well as energy efficiency of structure. It was observed that number of cut-outs influences the polygonal deformation pattern of tube with cut-outs. Overall study significantly helps to achieve the aim of improving vehicle crashworthiness characteristics by implementing cut-outs in a crash frame.

Generalized stacked LSTM for the seismic damage evaluation of ductile reinforced concrete buildings

AbstractTo organize accurate and effective emergency responses after an earthquake, it is vital to conduct an early and precise assessment of damage to structures. The use of fragility/vulnerability curves is an advanced evaluation approach for structural damage assessments. However, the analysis based on fragility curves significantly varies depending on soil conditions, ground motion, and structural characteristics. To overcome this issue, a stacked long short‐term memory network was proposed in this research. Unlike previous studies, two input features (acceleration time history in the form of vector and the number of stories in the scalar) are utilized to generalize the results for the same plan building frames with different stories. Three different approaches are presented in this work to link the ground motion time history with the number of stories (2, 4, 8, 12, and 20 stories) in the reinforced concrete building frame, and the networks were tested for unknown ground motions. Of the three approaches, those providing good results were selected for further analysis. For the approaches chosen, the network architectures were changed to a diamond shape and an autoencoder‐like shape with more hidden units (to obtain higher accuracy), which were tested for unknown same plan layout frames. The accuracy obtained using these approaches was significantly high (80%–90%) with a low training time. The proposed model is compared with other techniques and shows significant accuracy. The suggested networks exhibited a number of scenarios for estimating the damage state for unknown ground motions, as well as for unknown frames with various stories. Moreover, the capability of the networks to handle more scalar input features is examined by adding them probabilistically; with additional input variables, the networks predicted the damage state with higher accuracy.