| With more and more attention to energy conservation and environmental protection and the rapid reduction of demographic dividend,the problems of environmental pollution and low construction efficiency of cast-in-place construction of reinforced concrete structures are becoming more and more prominent.Therefore,prefabricated buildings have achieved highspeed development under the promotion of our government.In this paper,the quasi-static test of three bolted single reinforced concrete ribbed wallboards under reciprocating horizontal load is carried out,and then the axial compression ratio,bolt position,bolt number,and The effects of wall thickness and longitudinal reinforcement configuration on the seismic performance of a single wall panel,and the seismic performance of multiple wall panels working together are studied.The main research contents and results are as follows:（1）The pseudo static test of three full-scale specimens of bolted ribbed wallboard is carried out,and the failure mode,hysteretic curve,skeleton curve,energy dissipation capacity,bearing capacity,stiffness and ductility of bolted ribbed wallboard are obtained,and the above contents are analyzed.The results show that the failure of the specimens is brittle and the ductility is low due to the existence of bolted connections;The hysteretic curves of the specimens are in inverse s shape.The specimens lb1-2 are basically in the working stage with cracks.The maximum equivalent viscous damping coefficient of the specimens Lb1 and Lb2 is 0.1,the energy dissipation performance is poor,and the maximum ductility coefficient is2.7,which is less than that of the ordinary concrete shear wall;The increase of wall thickness and concrete strength have little effect on its failure mode,bearing capacity and energy dissipation capacity;The peak lateral bearing capacity of the specimen can reach more than90 k N,and the bearing capacity reserve is sufficient.（2）The ABAQUS finite element model of bolted single wall panel is established,the test is fitted,and the influencing factors are analyzed.The results show that the basic error between the finite element calculation results and the test results is about 10%,which is in good agreement;The axial pressure ratio has no obvious effect on the failure mode and bearing capacity of the wallboard.The axial pressure decreases from 80 KN to 20 KN,and the failure mode of the wallboard has no obvious change.The maximum fluctuation range of the maximum stress state of the bolt is 3.5%,and the maximum bearing capacity decreases by 8%;When the bolt spacing becomes smaller,the maximum bearing capacity of the specimen decreases by 28%,and the plastic deformation of the concrete at the bottom of the wallboard also decreases;When the number of bolts increases from 2 to 4,the plastic strain of the concrete at the bottom of the wallboard increases,and the maximum increase of the bearing capacity of the wallboard is 3%;The wall thickness of wallboard is reduced from 70 mm to50mm,the damage distribution area of concrete is increased,and the bearing capacity of wallboard is reduced by 3%;When the longitudinal reinforcement configuration of wallboard is reduced,the plastic deformation of concrete at the bottom of wallboard decreases,the plastic deformation of reinforcement increases,with a maximum increase of 54%,and the bearing capacity of wallboard decreases by 26%.（3）The ABAQUS finite element model of bolted multi wall panels is established,and its failure mode and lateral bearing capacity are analyzed.The results show that the failure mode of multiple wall panels is obviously better than that of single wall panel;When multiple wallboards work together,the maximum stress of the horizontal connecting bolt is less than that of the horizontal connecting bolt of a single wallboard,and at the same time,it bears obvious shear force.The maximum stress of the horizontal connecting bolt near the outer wallboard is greater than that of the horizontal connecting bolt of the wallboard in the middle;The bearing capacity of multiple wallboards is about 1.6 times that of a single wallboard. |
