| Modular architecture not only prefabricated mineralization degree is high,but performance is excellent,different from ordinary prefabricated buildings,modular architecture is a building as a whole is decomposed into different modules,staff prefabricated in the factory,transport workers to the construction site will be various modules like "building blocks" building directly,or with other cast-in-place component of whole building.Modular buildings have the advantages of green energy saving,excellent quality and rapid construction,in line with China’s "dual carbon goal" of carbon peak by 2030 and carbon neutral by 2060.Many scholars at home and abroad have studied the effects of seismic performance,shear performance and other mechanical properties of modular buildings,but few have studied the changes of mechanical properties of modular buildings in the construction site,especially the effects of concrete pouring on the mechanical properties of modular building wall panels.The research object of this paper is the new Mi C（Modular building,Modular Cconstruction）product developed by Zhuhai Hailong Company.Its innovation is the application of new Mi C Modular shell wall panel（hereinafter referred to as Mi C wall panel）,which can not only serve as enclosure and partition components,In addition,the whole module has simple structure and is easy to install.However,in actual site construction,the side pressure generated during concrete pouring may lead to cracks,mold expansion,slurry leakage and other defects in Mi C wall panels.In order to verify the influence of concrete pouring on the mechanical properties of Mi C wall panels,This article selects the zhuhai sea dragon staff dormitory building Mi C wallboard and zhuhai dragon integration toilet Mi C wallboard two field test as the research object,analyzing the test of Mi C wallboard in concrete pouring stages of stress and displacement,and with the aid of finite element software ABAQUS to make model is reasonable to assume that the test data from comparing with simulation results,The results are consistent,and the main work of this paper is as follows:（1）Through the field test study of concrete pouring on three Mi C wall panels with different sizes（QM1,QM2 and QM3）of Hailong Staff dormitory building in Zhuhai,the strain and displacement data of each panel were obtained.The changes of strain and displacement were analyzed and compared.The results showed that: First of all,the displacement completed by one casting is large,and the displacement completed by two casting is small,so the site construction can be divided into multiple casting;Secondly,the vibration process will have a great impact on the strain of the inner wall panel,the wall panel is very thin,vibration has a great impact on the mechanical properties of the board,so it is necessary to improve the construction method,reduce the emergence and development of wall cracks;（2）Through the field test study of concrete pouring on Mi C inner wall panel（QM4）of Zhuhai Hailong integrated toilet,the strain data of the panel is obtained,and the strain size is analyzed.The results show that: First of all,it can be seen from the three times pouring and vibrating concrete that the strain in the pouring process is very small,but in the vibrating process the strain of the inner wall plate is large,the wall plate is very thin,vibration has a great impact on the mechanical properties of the board,in this need to improve the construction method,reduce the emergence and development of wall cracks.Second,in the process of concrete pouring,found no cracks and leakage,but all have cracks in concrete vibratory phase,where the cracks are mainly distributed in the position of the truss bars,is produced by the perfoliate crack,is an obvious leakage phenomenon,in two truss bars across the location did not produce obvious cracks;（3）With the help of finite element software ABAQUS,simulation analysis is carried out on three mold shell plates of dormitory building and one mold shell plate of toilet.The simulation results are compared with the experimental data.The results show that: The results of ABAQUS simulation calculation are similar to the mechanical characteristics of Mi C wallboard in construction site,which proves the rationality of the plastic damage model and parameter setting selected in simulation,and provides a reference for the finite element calculation of Mi C shell plate.Finally,this paper analyzes and summarizes the research content and shortcomings,and makes corresponding suggestions and prospects for the follow-up research work.Figure [72] Table [11] Reference [56]... |
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