Nonlinear Finite Element Analysis On The Properties Of Full Prefabricated Concrete Shear Wall System

With the government attaching great importance to the housing industrializationand vigorously promoting it，prefabricated concrete structure has been widely appliedto the field of building. Based on the shear tests of joints of the full precast concreteshear wall system，the interface shear performance is analyzed first. Then the refinedand the macroscopical finite unit analysis of the full prefabricated concrete shear wallstructure are carried out using MSC. Marc and MIDAS，respectively preliminarydiscussion is performed on the seismic performance of the full prefabricated concreteshear wall system. The research work of this thesis could be summarized as thefollows：(1) On the basis of shear tests of joints，the interface shear-slip models and thecorresponding interface shear strength formulas suitable for test connection interfaceare put forward through theoretical analysis and calculation.(2) Refined nonlinear finite element analysis (FEA) of prefabricated shear wallspecimens are performed based on the general FEA program MSC.Marc. Bycomparison with the existing tests，the reasonableness of the finite element model isverify. Parametric analys are performed to study of the effect of the axial compressionratio， interface shear reinforcement strength， diameter and number of differentparameters on the structural performance of precast shear wall.(3) Using the FEA program MSC.Marc，we establish a series of finite elementmodels of prefabricated shear wall and the corresponding cast-in-situ shear wall. Inorder to compare the stiffness ration and the bearing capacity ration of two structures，which the axial compression ratio，the concrete strength，the strength of groutingmaterial，the wall width and thickness，the strength and size of interface connectingbars are analysed. Finally，we put forward formulas of the stiffness and the bearingcapacity reduction，which provide a basis for simplified analysis of macroscopic finiteunit.(4) The macroscopic finite unit models for full prefabricated concrete shear wallstructure with three different heights(5floors,15floors or30floors) are developed bythe FEA program MIDAS/Building，where the stiffness and the bearing capacityreduction factor are used. To investigate the seismic performance of the prefabricatedconcrete shear wall structure，the nonlinear static pushover analysis was conducted.