Composite Wall Research Articles

Synergistic effect and mechanical properties of adjacent composite pile-sheet wall for widening embankment

Synergistic effect and mechanical properties of adjacent composite pile-sheet wall for widening embankment

Dissipative Particle Dynamics: Simulation of Chitosan–Citral Microcapsules

In this paper, the dissipative particle dynamics (DPD) method is used to simulate the self-assembly process, appearance, mesoscopic structure, and wrapping properties of microcapsules formed with citral as the core material and chitosan and sodium alginate as the single-wall materials, and with citral as the core material and chitosan-sodium alginate, chitosan–methylcellulose, sodium alginate–chitosan, and sodium alginate–methylcellulose as the double-wall materials. The effects of chitosan content and wall material composition on the structure, morphology, encapsulation performance, and stability of microcapsules are compared and analyzed. In addition, the microcapsules are deeply analyzed by using the mesoscopic structure, radial distribution function, and diffusion coefficient. This study provides a new idea and method for the preparation of citral microcapsules, and is of great significance for the design and development of new composite wall microcapsules.

Bubble collapse dynamics near the composite walls: Progress and challenges

Bubble collapse dynamics near the composite walls: Progress and challenges

Cyclic behavior of UHPC-filled high-strength double steel plate composite shear walls

Cyclic behavior of UHPC-filled high-strength double steel plate composite shear walls

Groundwater pollution management with source remediation and composite geomembrane cut-off wall: an analytical model and field investigation

Groundwater pollution management with source remediation and composite geomembrane cut-off wall: an analytical model and field investigation

Axial compressive behaviors of the curved steel-plate composite walls with small curvature radius-to-section thickness ratio

Axial compressive behaviors of the curved steel-plate composite walls with small curvature radius-to-section thickness ratio

The Flexural Performance of Underground Combined Walls

Connecting diaphragm walls as permanent components of underground spaces in relation to basement sidewalls is an effective method for enhancing structural stability, reducing structural footprint, and improving waterproofing performance. To investigate the influence of connection methods between diaphragm walls and sidewalls on the mechanical performance of combined walls and to determine the differences in mechanical behavior between combined and composite walls, four–point bending experiments were conducted based on static loading systems and digital imaging technology. The cracking characteristics, strain response, load–bearing capacity, displacement ductility, and interface mechanical behavior of a combined wall with interface roughening and rebar anchoring, a combined wall with shear grooves, and a composite wall with a high–density polyethylene waterproof layer were comparatively analyzed. The results showed that for the combined walls with interface roughening and rebar anchoring or with shear grooves, through–thickness cracks extended across the interface, with no interfacial slipping failure observed. The combined wall with shear grooves exhibited noticeable through–thickness cracks. For the composite wall, cracks were staggered on both sides of the interface, with significant interface slipping failure. Compared to the composite wall, the combined walls demonstrated superior overall performance with fewer cracks. Additionally, the load–bearing capacity and displacement ductility of the combined wall with interface roughening and rebar anchoring were significantly higher than those of the combined wall with shear grooves and the composite wall. The composite wall exhibited the lowest load–bearing capacity, while the combined wall with shear grooves demonstrated the least displacement ductility.

Comparison and Design of Dry-Stack Blocks with High Thermal Resistance for Exterior Walls of Sustainable Buildings in Cold Climates

Given the increasing demand for higher construction productivity and better thermal resistance, adopting innovative building envelope systems is crucial. Dry-stack masonry blocks have emerged as a viable solution, due to their rapid assembly, mortar-free construction, and reduced dependence on skilled labor. However, there is a lack of scientific evaluation on the thermal performance of dry-stack blocks for cold climate zones and corresponding proper designs. This study addresses this gap by investigating market-available blocks and proposing two innovative block designs—a composite block and a simple block—highlighting their thermal performance and associated challenges. Using finite element modelling, the thermal resistance of these blocks was carefully assessed and compared. The results show that thermal bridging, induced by masonry ties penetrating the insulation, significantly impacts the thermal resistance of the wall made with simple blocks, resulting in an 11% decrease in the effective thermal resistance (R-value) as compared to the composite block walls. Furthermore, compared to a conventional masonry wall with the same insulation thickness, the composite-block wall exhibits a 24% higher R-value. The composite block outperforms existing market options in terms of thermal resistance, making it a superior choice for cold climate regions. Conversely, the simple block is preferred when sophisticated manufacturing facilities are unavailable. Overall, the composite block wall’s improved thermal resistance can make a meaningful contribution to lowering operational energy demand (i.e., operational carbon), contributing to the shift to a sustainable building stock.

New energy-efficient composite wall from expanded polystyrene concrete in fixed formwork

This study focused on the development and verification of the effectiveness of a new energy-efficient composite wall made of polystyrene foam concrete in a fixed formwork, prepared using light steel thin-walled structures and polystyrene foam concrete as an aggregate. This research included the development of the new patented solution, a multi-criteria analysis of this solution through comparison with the most common solutions, and experimental investigations of the heat transfer resistance of the new wall. Based on the results of a multi-criteria analysis involving eight criteria, it was established that the new solution of a composite wall in a fixed formwork is more effective than 13 traditional alternatives. Experimental studies on the heat transfer resistance, conducted at the laboratory of the Scientific Research Institute of Building Structures in Kyiv, demonstrated the heat-insulating properties of the new wall. The installation of the new wall at an actual construction site confirmed the reduction in labour and material consumption owing to the new technology. Thus, for the first time, the experimental results of the heat transfer resistance of the new wall at two cross sections (maximum thickness of polystyrene foam concrete and maximum accumulation of steel elements) made it possible to substantiate the need for external insulation of the wall. Low values of the specific labour intensity, material intensity, as well as the possibility of installing wall elements with minimal use of construction equipment make it possible to use the developed solution for a wide range of construction structures.

Analytical study for two-dimensional transport of organic contaminant in a polymer material-enhanced composite cutoff wall system.

Analytical study for two-dimensional transport of organic contaminant in a polymer material-enhanced composite cutoff wall system.

Synergistic performance study of ventilated photovoltaic based on composite phase change wall in summer

Synergistic performance study of ventilated photovoltaic based on composite phase change wall in summer

Experimental study on shear resistance of truss connector in double skin steel-concrete composite shear wall under monotonic loading

Experimental study on shear resistance of truss connector in double skin steel-concrete composite shear wall under monotonic loading

Numerical investigation on out-of-plane behavior of unilateral stainless steel double-steel-plate composite shear walls

Numerical investigation on out-of-plane behavior of unilateral stainless steel double-steel-plate composite shear walls

Experimental and numerical investigation on seismic performance of an innovative steel-concrete composite shear wall

Experimental and numerical investigation on seismic performance of an innovative steel-concrete composite shear wall

Construction and microencapsulation of tea polyphenols W1/O/W2 double emulsion based on modified gluten (MEG).

Construction and microencapsulation of tea polyphenols W1/O/W2 double emulsion based on modified gluten (MEG).

Study on the influence of forming process of I-shaped long stringer of civil aircraft composite materials on crippling performance

Abstract Crippling performance is an essential indicator of I-shaped long stringers used in civil aircraft composite wall panels. In order to study the effect of the composite molding process on crippling performance, this paper studies the effect of co-curing and co-bonding molding methods on crippling performance for I-shaped long stringers with impact damage. Furthermore, under the premise of co-curing molding, the effect of soft film and hard film processes on crippling performance is studied. Test articles were manufactured and tested for verification. The results showed that the crippling performance of co-cured composites was 1.21 times that of co-bonding, and the crippling performance of soft mold composites was 1.08 times that of hard mold, which provides a basis for composite wall panel designers to choose composite molding processes.

Hybrid machine learning algorithms for estimating shear strength of steel-reinforced concrete composite shear walls

Hybrid machine learning algorithms for estimating shear strength of steel-reinforced concrete composite shear walls

Seismic Performance and Flexural Capacity Analysis of Embedded Steel Plate Composite Shear Wall Structure with Fiber-Reinforced Concrete in the Plastic Hinge Zone

Due to its high axial bearing capacity and good ductility, the embedded steel plate composite shear wall structure has become one of the most widely used lateral force-resisting structural members in building construction. However, bending failure is prone to occur during strong earthquakes, and the single energy dissipation mechanism of the plastic hinge zone at the bottom leads to the concentration of local wall damage. To improve the embedded steel plate composite shear wall structure, the plastic hinge zone of the composite shear wall is replaced by fiber-reinforced concrete (FRC) and analyzed by ABAQUS finite element simulation analysis. Firstly, the structural model of the embedded steel plate composite shear wall structure with FRC in the plastic hinge zone is established and the accuracy of the model is verified. Secondly, the effects of steel ratio, longitudinal reinforcement ratio, and FRC strength on the bearing capacity of composite shear walls are analyzed by numerical simulation. Finally, a method for calculating the embedded steel plate composite shear wall structure with FRC in the plastic hinge zone is proposed. It is shown that the displacement and load curves and failure modes of the model are basically consistent with the experimental results, and the model has high accuracy. The axial compression ratio and FRC strength have a great influence on the bearing capacity of composite shear walls. The calculation formula of the normal section bending capacity of the embedded steel plate composite shear wall structure with FRC in the plastic hinge zone is proposed. The calculated values of the bending capacity are in good agreement with the simulated values, which can provide a reference for its engineering application.

Research on Flexural Performance of Basalt Fiber-Reinforced Steel–Expanded Polystyrene Foam Concrete Composite Wall Panels

This paper presents a novel design of prefabricated steel–EPS foam concrete composite wall panels, which can solve issues such as long curing times, decreased impermeability and durability, easy corrosion of steel reinforcement, and difficult construction under the cold climate conditions in Northeast China. A parametric analysis of the composite wallboard was carried out using the finite-element analysis software ABAQUS 6.12. In-depth exploration was conducted on the contributions of parameters such as the density of foam concrete, the strength of cold-formed thin-walled C-section steel, and the cross-sectional height of cold-formed thin-walled C-section steel compared to the overall flexural bearing capacity of the composite wallboard as well as the impacts of these parameters on the failure modes. The mechanical properties of the composite wallboard were verified through four-point bending tests. The bearing capacity of this composite wallboard can reach up to 100.58 kN at most, and its flexural bearing capacity can reach 30.44 kN·m. Meanwhile, its ductility coefficient of 2.9 is also within the optimal range. The research results confirm the superior mechanical properties of the designed composite wallboard, providing beneficial references for the research on similar composite material structures.

Experimental and Finite Element Analysis on Seismic Performance of Composite Shear Walls with Embedded Cold-Formed C-Shape Steel Section

Experimental and Finite Element Analysis on Seismic Performance of Composite Shear Walls with Embedded Cold-Formed C-Shape Steel Section