Assembly Building Research Articles

Application of BIM Technology in Cost Control during the Stage of Production and Transportation of Assembly Building

Green building has become an important evaluation criterion for house construction. Prefabricated buildings are an effective means to achieve the goal of green building. However, the high cost during the construction process hinders the popularization and application of prefabricated buildings. Based on the current research, Building Information Modeling (BIM) Technology is an advanced technology in the construction industry, which has high efficiency in cooperation with prefabricated buildings. Based on BIM technology, it has better development in cost control of prefabricated buildings. Compared with traditional buildings, it has fast construction speed, high safety level, environmental protection, and other advantages. This paper analyzes the cost of influencing factors in the production and transportation stage, and establishes the cost management process of prefabricated buildings based on BIM technology. It analyzes the application of BIM technology from cost control, cost accounting, and cost analysis at this stage and finally verifies the feasibility of cost management based on BIM technology by taking a prefabricated building as the research object.

Life cycle assessment (LCA) of natural vs conventional building assemblies

Natural earthen and bio-based building materials are critically needed to dramatically reduce energy-intensive and extractive construction practices that are the hallmark of the modern building industry. Building assemblies such as cob, light straw clay and rammed earth were shown to provide an optimal indoor environment for occupant comfort and health. Despite these advantages, natural materials are still not widespread in mainstream construction for two primary reasons: technical data is inadequate to quantify their energy performance in different climates, and environmental measures are missing to perform decision making throughout the design process. This paper presents an environmental life cycle assessment (LCA) of natural earthen and bio-based materials compared to conventional building materials in 6 climates: hot desert, desert, semi-arid, Mediterranean, temperate, and continental. Results show that, when coupling the embodied and operational environmental impacts, the natural assemblies reduce energy demand by 32–59% in the hot desert climates, 29–55% in semi-arid climates, 46–73% in Mediterranean climates, 34–57% in temperate climates and 27–50% in continental climates as compared to conventional assemblies. The operational impacts are shown to be highly dependent on the thermal properties and climate zone, but in all cases natural assemblies outperform conventional assemblies. In particular, light straw clay and insulated rammed earth are the top performers for all 6 climates. The work presented in this paper contributes critically needed environmental quantifications to catalyze the advancement of healthier and more environmentally sound commitments to ecological construction worldwide.

Application of prefabricated building in emergency rescue project construction Taking — Wuhan Huoshenshan Hospital Project as an example

In recent years, various natural disasters and health events have caused huge losses of people’s lives and properties. Because these events have the characteristics of force majeure, it is necessary to focus on the emergency relief after the disaster, with the development of industrialization of construction industry, the modular building provides strong technical support for the construction of emergency rescue projects. In late 2019, the super-efficient construction of Wuhan Huoshenshan Hospital became an example of the application of Modular Assembly building in the rescue of the new coronavirus epidemic in Hubei Province, it provides a new idea for building industrialization and sustainable development

A Variable Parameter Ambient Vibration Control Method Based on Quasi-Zero Stiffness in Robotic Drilling Systems

Vibrations in the aircraft assembly building will affect the precision of the robotic drilling system. A variable stiffness and damping semiactive vibration control mechanism with quasi-zero stiffness characteristics is developed. The quasi-zero stiffness of the mechanism is realized by the parallel connection of four vertically arranged bearing springs and two symmetrical horizontally arranged negative stiffness elements. Firstly, the quasi-zero stiffness parameters of the mechanism at the static equilibrium position are obtained through analysis. Secondly, the harmonic balance method is used to deal with the differential equations of motion. The effects of every parameter on the displacement transmissibility are analyzed, and the variable parameter control strategies are proposed. Finally, the system responses of the passive and semiactive vibration isolation mechanisms to the segmental variable frequency excitations are compared through virtual prototype experiments. The results show that the frequency range of vibration isolation is widened, and the stability of the vibration control system is effectively improved without resonance through the semiactive vibration control method. It is of innovative significance for ambient vibration control in robotic drilling systems.

Jatio Sangsad Bhaban: Aspiring to be a UNESCO World Heritage Site

The Jatio Sangsad Bhban (JSB) or the National Assembly Building of Bangladesh is an internationally renowned architectural masterpiece designed by eminent 20th-century American architect Louis I. Kahn. Its unique Architectural merit makes it one of the most significant buildings of the 20th century. The impact of this iconic building encompasses all spheres of Bengal life including culture, heritage, ethos and lifestyle. Its architectural values also evoke national identity, symbolizing the hopes and aspirations of the people of Bangladesh. However, despite its international and national material, social and human significance, it is yet to be nominated as a UNESCO World Heritage Site (WHS). This paper argues for the potential of the JSB to become a WHS.

Design and technological support for the assembly of long thin-walled buildings

The article considers the issue of design and technological support for the assembly of extended thin-walled buildings, in particular, the problem of ensuring their entry into the reciprocal parts that ensure the functioning of the assembled products. A new method for controlling the size of the entry of buildings is proposed. The objective of the technical solution is to reduce the complexity of control of the hulls while ensuring their entry into launch tubes. The method consists in the fact that the housing is installed in two prisms according to the extreme centering thickenings. The readings of the measuring device are taken, which judge the suitability of the housing by the diameter of the adjacent cylinder, characterized in that the indicator is installed in a plane perpendicular to one of the faces of the prism, adjusted according to the standard when touching the tip of the middle centering thickening of the standard. As a result of testing in the conditions of the current production, it was found that the verification of the product is reduced several times.

Design, assembly and application of boronate ester polymer

In the last hundred years, polymer science has been flourishing. Industrial products of polymers have been used in many aspects of our life. Each new polymer and its assembly driving force indicates the blooming of the “new branch” of the towering tree of polymer. Researchers are always looking for new polymer and new self-assembly driving force to imbue the towering tree of polymer with magic. The traditional self-assembly driving forces are limited to noncovalent interactions, such as electrostatic interaction, hydrogen bond, π-effects or Van der Waals interaction. The bonding energy of noncovalent interaction is weak and directionless. Therefore, the as-formed assemblies have the problems of poor stability and low structural order. Compared with the good designability of the assembly building blocks, the driving forces of self-assembly is monotonous and limited. In recent years, interactions like coordination, dynamic covalent bond and host-guest recognition have been introduced into the self-assembly system, which leads to new methods of self-assembly. The structure of self-assembly which depends on strong bond is inert, so it is difficult to realize the intelligent characteristics including irritating response, self-regulation and self-evolution. The driving force of ideal self-assembly should simultaneously have the characteristics of weak bonding strength, directionality and tunable chemical bonds. Boronate ester polymers, which are formed by incorporating dynamic boronate ester bonds into the main chain, side chain or cross-linking point of polymers, can be described as a new polymer material with high synergy of “stability” and “dynamic”. Stability refers to the high-efficiency condensation ability of phenylboronic acid group with 1,2-diol or 1,3-diol structures and polymers, as well as the protection of polyhydroxy groups, especially phenolic hydroxyl groups. The dynamic feature of boronate ester polymer is due to their reversible cleavage and reformation under the stimulation of temperature, pH and guest molecules. Catechol group is one of the polyhydroxy functional groups used to construct boronate ester polymers. It can form coordination, hydrogen-bonding, electrostatic interaction, with metal ions, inorganic nonmetallic oxides, etc. The introduction of catechol as a building block into boronate ester polymer system could make surface engineering more intelligent. When nitrogen-containing functional groups are present in molecular chains, B-N coordination can also be formed between boronate ester polymer chains. These supramolecular driving forces can induce the self-assembly of boronate ester polymers in solution and interfacial. Boronate ester polymers not only have flexible designability of molecular structure, but also give full play to the intrinsic characteristics of boric acid groups, phenylboronic acid groups and polyol groups. From the molecular structure level, boronate ester polymer is a kind of multifunctional polymer. From the supramolecular point of view, the B-N coordination of boronate ester polymer and the strong interface binding force of catechol has a unique advantage in driving the ordering of polymer chains. Boronate ester polymers have been widely used in surface engineering, intelligent materials, biomedicine, energy storage and other fields, due to its wide range of molecular structure designability and unique B-N coordination between chain segments. In this review, starting from molecular block and self-assembly mechanism, the synthesis strategy, properties, supramolecular behavior and application fields of boronate ester polymers were summarized; the development direction of boronate ester polymer functional materials was prospected.

The characteristics purifying formaldehyde of air purification system for haze-absorbing wall

Formaldehyde in indoor air is very harmful to human body. In this paper, a haze-absorbing wall air purification system was constructed based on assembly buildings. The experimental device was set up with bulk activated carbon as adsorption material. The purification performance for formaldehyde of the system was studied experimentally. The effects of air velocity and air passage size on formaldehyde purification efficiency were analysed. It was found that the haze-absorbing wall system can effectively purify the formaldehyde in the air. After the experiment, the purification efficiency of the system to the formaldehyde is more than 90% under all conditions of the experiment. With the increase of inlet air velocity, the purification efficiency of haze-absorbing wall to formaldehyde increases first and then decreases, and the peak value appears when the air velocity is 0.4m/s. When the air passage is 20cm and the air velocity is 0.4m/s, the haze-absorbing wall has the best purification performance for formaldehyde.

Analysis And Research on The Factors Influencing The Design of Assembled Buildings

Based on the previous research on the current situation of the application of assembly design, this paper identifies 14 influencing factors that cause the problems of assembly design by combining the literature research method and the Delphi method. In order to ensure the accuracy and appropriateness of the influencing factors, a questionnaire survey was conducted among the professionals and technicians who had worked on assembly building design projects, and 10 major influencing factors were selected by the magnitude of the influencing factors. Then, using expert interviews, the 10 factors were ranked in terms of their application to the assembly building design process, and finally five important factors influencing the assembly building design process were derived. The theoretical basis for future research on the optimization of assembly building design was laid.

Research on the secondary design of prefabricated buildings based on Three-Dimensional

With the improvement of design requirements and computer technology, the three-dimensional design with multi-professional collaborative design, refined design and engineering digitization as the core, is being popularized and used in the substation engineering design of State Grid Corporation. This paper will use the three-dimensional software to deepen the design of prefabricated buildings, and refine assembly building design, embed pipeline and set openings reasonably, which would reduce the site labor input, shorten the construction period, and reduce the site construction risk, and improve the quality and technological level of engineering construction at the same time.

러닝 머신 진동 저감 효과를 위한 댐퍼 형상 연구

As interest in the quality of life has recently increased, there is a growing interest and demand for exercise equipment, such as indoor treadmills or cycles, which can be used at home. However, the use of such indoor exercise equipment has caused social problems by generating noise between floors and causing inconvenience to neighbors. In particular, treadmills that generate a lot of vibration during use cause more social problems in an assembly building, such as an apartment. The purpose of this study is to design dampers of various shapes and to develop dampers with high vibration damping effects through vibration analysis. The damper was installed at the lower end of the treadmill to reduce vibration from the product. Three types of dampers were designed by referring to the damper shape of the existing treadmill, and the vibration reduction effect of each damper shape was verified through structural analysis of the magnitude of vibration generated from the bottom surface of each damper.

A comparative study on integration of courtyard in creating environmental sustainability space for eclectic buildings

Buildings are categorised into various types such as residential, educational, assembly and etc. This paper is described one type of assembly building namely mosque and its elements. The mosque is comprising of several elements such as courtyard, prayer hall, arcades, minaret, dome, the ablution rooms and toilets. It should be designed to accommodate the worshipper to feel comfortable and humble in the presence of God while performing the ‘solah’. In tropical region, especially in Malaysia; the existence of the courtyard in traditional mosques is still questionable whether it has fully considered the environmental benefits or it is simply a trend adopted from the Middle East. Previous studies have found that the purpose of having a courtyard inside a mosque is either for spatial reasons or it may be negligible. Hence, this study is conducted to understand the courtyard in a specificity of architectural style and the effects on spatial organization in traditional mosque design. The observation methods are used at the fieldwork in selected traditional mosques. From the observation two types of building indicator of space and form are identified for better understanding of courtyard characteristics of selected traditional mosques.

A study on 3D visual identification of the top structure of assembly building based on BIM

In order to overcome the problem of low recognition rate of building image when constructing three-dimensional model with traditional methods, a new idea of top shape and structure model of assembly building based on BIM is proposed in this paper. The method calculates and identifies the structural parameters of the top contour of assembly building according to BIM technology, retrieves the internal model of the top contour structure of assembly building from the database which is consistent with the result of feature recognition, and obtains the three-dimensional construction of image surface and the three-dimensional modelling of scattered point cloud surface through digital camera and point cloud data, so as to build the final three-dimensional model. Finally, the three-dimensional visualisation of assembly is realised. The experimental results show that the proposed method has high recognition rate.

Three-dimensional collapse simulation on the spatial structure of concrete assembly building based on BIM

Three-dimensional collapse simulation on the spatial structure of concrete assembly building based on BIM

Research on life cycle cost control model of prefabricated building based on system dynamics

This paper takes BIM as the platform and system dynamics as the research method, establishes the life cycle cost control model of prefabricated buildings, draws causality diagram and flow inventory diagram by Vensim software, obtains the main influencing factors of assembly building cost control, and then gives the cost control measures. In this paper, BIM, prefabricated building and system dynamics are combined to study the cost control of prefabricated building from a new perspective, and reasonable suggestions are given to provide new ideas for promoting the development of prefabricated building in China.

Jatio Sangsad Bhaban or National Assembly Building and Sustainability

Designed by American architect, Louis I. Kahn, the Jatio Sangsad Bhaban (JSB) or National Assembly Building of Bangladesh is a world-renowned iconic building situated in Bangladesh. Louis I. Khan was commissioned to design the JSB during the period before the term ‘sustainable’ was coined. In sustainable term it has controversial standing due to its cost, social and participatory aspects. However, it still stands as one of the masterpieces that represent hope and aspiration of the people of Bangladesh. This paper intends to look at the JSB through the lens of ‘sustainability’ to ascertain the degree of sustainability it has or has not achieved considering three tenets of sustainability, namely environmental, social and economic.
 Journal of Engineering Science 11(2), 2020, 127-132

Truss Construction Of Green Fabricated Steel Structure Based On Bim Intelligent Technology

In order to overcome the problems of stability and deformation in the construction of green assembly steel structure truss assisted by common technology, a construction method of green assembly steel structure truss based on BIM intelligent technology is proposed. The construction management platform is constructed by BIM intelligent technology. The truss construction is designed based on BIM intelligent technology, and the truss stress test and truss deformation test are carried out. The experimental results show that the method has better strain and deformation properties than the conventional process. Based on BIM technology, the maximum displacement and stress of truss are 4.04 mm and −37.7 MPa respectively, which meet the requirements of stability and strength, and ensure the safety in the construction process. Practice shows that this method is more conducive to ensure the rationality and scientificity of truss construction, so as to improve the overall quality of green assembly building.

The Multiple Meanings of Jatio Sangsad Bhaban

Jatio Sangsad Bhaban, the National Assembly Building of Bangladesh, is an iconic building and architectural landmark designed by American architect Louis I. Kahn. Jatio Sangsad Bhaban was constructed between 1962 and 1983 and is located in the heart of Dhaka, the nation’s capital. The extant literature on Louis I. Kahn’s work suggests that Jatio Sangsad Bhaban is a significant architectural masterpiece. One of its most notable features is its architectonic quality, providing it with the grandeur of a modern monumental building. In this context, this paper aims to examine the underlying multiple meanings, that is, socio-political, cultural, historic and philosophical meanings of the Jatio Sangsad Bhaban building By constructing and summarising meanings, rather than exploring the physical building itself, this paper supports the notion of multidimensional perspectives of monumental architecture. —The multiple meanings of icoic architecture through the lens of societal issues has been endorsed by many architectural critic. Accordingly, this paper considers the cultural, political, ethical and historical meanings of Jatio Sangsad Bhaban. Revealing and summarising other aspects apart from its architectonic dimensions is a new approach to understanding a widely acclaimed iconic building like Jatio Sangsad Bhaban

Research on Restricting Factors and Countermeasure of Assembled Architecture Development

With the drawbacks of traditional construction methods becoming more and more prominent, many cities in China have responded to the call to actively promote assembly building. In some industrialized developed countries, assembly building occupies a high proportion and a mature technical system, including high standardization of parts, components, and perfect industrial chain. Compared with developed countries, cast-in-situ construction is the main construction method in China, and the construction efficiency is not high. In order to save resources, protect the environment and speed up the structural reform of supply in the construction industry, assembly building has become a way to reform the construction mode in China. This paper first analyses the difference between assembled building and cast-in-place building, then analyses the restricting factors on assembled building, and finally it puts forward some suggestions.

Application Value Analysis of BIM Technology in Assembly Building

With the help of BIM Technology, the design, production and construction level of Assembly Building (hereinafter referred to as AB) can be effectively improved, and the production chain from design to operation and maintenance of AB can be more compact and reasonable, which can play a quite active role in the process of realizing energy conservation and emission reduction, reducing pollution and promoting the development and transformation of the construction industry in China. However, in order to achieve a closer combination of BIM Technology and prefabricated building, it is necessary to further run in and improve in practice, which still needs the joint efforts of the practitioners in the construction industry.