Seismic Behavior Research Of New Gypsum Concrete Composite Wallboard T-shaped Joints And I-shaped Components

Since the 18 th CPC National Congress,China has started to vigorously develop an energy-saving and environmentally friendly assembly-type building system.To the nineteen major victory held,it calls for the full promotion of the assembly-type building system in our country.However,the new concrete-filled gypsum composite wallboard system was introduced into our country from Australia and was modified as a new type of construction-friendly building assembly system.Our task group has carried out a large number of experimental and theoretical analyzes on the structural system of this kind of wallboard.Based on the low-cycle reciprocating test of T-type nodes,this paper analyzes its seismic performance and performs finite element simulation analysis,verified the possibility of numerical simulation,and then used finite element software to further study the kind of wallboard I-shaped node seismic performance.The main contents of this paper include:1.According to the T-joint test of the new type of concrete-filled gypsum composite wallboard previously conducted by our task group,the test results are further analyzed.It is found that the tensile properties of the T-shaped joints with tensile reinforcement extending into the core area of the joint are better than the tensile strength Into the node core area.The ABAQUS finite element simulation of T-joints was carried out.The comparison between the calculated results and the experimental results shows that the fitting is good,which shows that the finite element model can simulate the mechanical properties of the kind of wallboard.2.The ABAQUS finite element software was used to simulate the seismic behavior of T-joints with different flange length of new CFR-gypsum composite wallboard.The seismic performance indexes such as bearing capacity,ductility,energy dissipation,stiffness degradation and stress cloud are compared.It is found that increasing the flange length under horizontal low-cycle reciprocating loads can improve the seismic performance of T-joints.3.The ABAQUS finite element software is used to simulate the seismic performance of "I" type wallboards with different pull-in patterns.Compared with the seismic performance indexes of bearing capacity,ductility,energy dissipation,stiffness degradation and stress cloud,tie bar into the core area of the joints can improve the seismic performance of I-shaped wallboards.The ABAQUS software was used to simulate the seismic performance of I-shaped wallboards with different core sizes.Compared the calculated results,it was found that increasing the core area of the core can also improve the seismic performance of I-shaped reds.