Study on seismic behavior of prefabricated lightweight steel frame-short limb composite wall structure
In order to study the seismic behavior of prefabricated lightweight steel frame-short limb composite wall structure(LSCF-SW),three full-scale specimens including one lightweight steel frame(LSCF)structure,one lightweight steel frame-short limb truss(LSCF-ST)structure,and one LSCF-SW were experimentally studied by low reversed cyclic loading.The failure mode,hysteretic curve,bearing capacity,stiffness degradation,deformation performance,energy consumption and strain characteristics of the strncture were analyzed.The results show that the short limb steel truss and short limb truss composite wall are the first seismic fortification line,which efficiently improve the seismic performance of the LSCF.Compared with the specimen LSCF,the ultimate bearing capacity and initial stiffness of specimen LSCF-SW increase 284.82％and 244.46％respectively.The joint working performance between short limb steel truss and concrete of composite wall was reliable,and the confinement effect of the concrete delays the local buckling of the short limb truss,and the short limb truss enhancs the deformation capacity of the core concrete of composite wall.The proposed prefabricated LSCF-SW structure has the advantages of unambiguous force transfer,good seismic performance,and convenient assembly.The LSCF-SW structure is particularly suitable for low and multi-storey lightweight steel composite structures,and the design method is also suitable for other prefabricated steel frame structures.
万方数据
维普
