| Prefabricated building components have been widely used in the field of construction engineering.Prefabricated building components have been widely used in the field of construction engineering.With the introduction of green energy conservation and environmental protection policies and the increasing demand for building materials market,the promotion of green wall materials with better performance in all aspects is the mainstream trend of the development of the construction industry in China and even in the world.The concrete gypsum composite wallboard inherits the advantages of heat insulation,sound insulation,heat preservation and noise reduction of the gypsum board itself,as well as the advantages of bearing and compression resistance of the concrete,its comprehensive performance is superior to that of the ordinary concrete shear wall,with strong practicability and better living environment.In the aseismic design,"strong joint weak component" is advocated,the aseismic performance of slot type and I-shaped joint shear wall is further studied,the stress state and characteristics of the two joints in the quasi-static test research and the numerical analysis of the finite element model are analyzed.Referring to the engineering calculation example of the 18 story building with one shape gypsum concrete composite shear wall board,it is assumed that in the 18 story building with slot type or I shape gypsum concrete composite shear wall,1-5stories are in the form of full hole pouring concrete,6-12 stories are in the form of single hole pouring concrete,and 13-18 stories are in the form of two hole pouring concrete.On the premise of the same joint form of shear wall in each floor,the seismic performance of the sixth floor slot shear wall and the seventh floor I-shaped shear wall is studied by quasi-static loading test.Through the comparison between the calculated results of finite element method and the collected test data,the summarized research results and innovations will be reflected in the following points:1.Through consulting the seismic design code and the structural reinforcement requirements of concrete,a group of slot type cast-in-place concrete gypsum composite shear wall panel and a group of I-shaped cast-in-place concrete gypsum composite shear wall panel are designed.Through the calculation method of two-way slab,the load value and axial compression ratio of the sixth and seventh shear walls are calculated.The stress,stiffness and shape change of the composite wall panel with slot joint and I-joint under the low cycle reciprocating load are obtained.2.The relevant data of the cracking load,yield load,ultimate load,yield displacement and ultimate displacement of the new type of slot type and I-shaped joint components of the composite wall board with the diaphragm concrete and gypsum are obtained,it is found that the joint area of the slot type or I-shaped component is less likely to be damaged than that of the web area and has better safety reserve.3.The results of the numerical simulation software match the test results well.In this paper,the seismic performance of slot and I-shape models with different types of grouting is studied.The results show that the ductility of the channel type specimens is poor under the condition of large axial compression ratio,and the change rule of the seismic performance of the channel type diaphragm concrete members under different axial compression ratio is compared by simulation,The limited number of axial compression ratio of slot type grouting model is put forward. |
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