Test study on seismic behavior of rectangular multi-cavities steel-concrete composite column about weak-axis
Multi-cavities steel-concrete composite columns(MSCC)of various cross-section types are used in special-shaped column frame structure to provide good functional and assemblable construction performance,unlike special-shaped columns with lateral limbs,it is more important to ensure the seismic performance of rectangular section columns in the weak-axis.To investigate the seismic performance and mechanical mechanism of rectangular MSCC in weak-axis,a combination of the low-cyclic loading test and finite element analysis is used to carry out the research.The results show that the hysteretic curve in the weak-axis of the rectangular MSCC under compression-bending load is full,and the whole process can be divided as stable bearing,transformation transition and post-peak second-order effect,and the story drift of the two feature cut-off points of the specimen in above three stages are 1/57 and 1/27 respectively.The story drift of the specimen at the yield and failure damage point are 1/85 and 1/23 respectively,which are greater than the code limits.The ductility coefficient is 3.73.The steel tube at both ends,the steel plate in the middle and the concrete in the cavity can work together,and no obvious crushing and cracking to the concrete,no obvious damage to the steel tube and the steel plate.The obtained finite element simulation results are in good agreement with the test results,and the average relative error of the skeleton curves is 4.6%.The above results can deepen the knowledge of the seismic performance of rectangular MSCC in the weak-axis and provide a reference for engineering application.
万方数据
维普
