内置CFRP圆管的方钢管高强混凝土框架结构的静力弹塑性分析

目的研究内置CFRP圆管的方钢管高强混凝土柱-工字型钢梁框架结构的工作特点和抗震性能及不同材料配置量对结构抗震性能的影响．方法使用OpenSees软件，对一个8层内置CFRP圆管的方钢管高强混凝土柱一工字型钢梁的框架结构建立标准模型，进行Pushover分析．结果不同参数对组合柱的承载力、刚度、延性均产生影响，并且由于约束作用的存在改变了夹层混凝土和核心混凝土的本构关系，间接影响了组合柱的抗震性能．将Pushover分析中能力谱法得出的性能点反带入能力谱求出其所对应的目标位移为140mm，满足规范的限值要求．结论设计时应根据需要改变梁柱刚度比的最小值及其性能，达到在合理塑性破坏形式的前提下，使组合柱更多的参与结构抗震，以提高结构的抗震能力．

Pseudo-Static Performance of High-Strength Concrete Filled Square Steel Tube Column with Inner CFRP Circular Tube Frame Structure

In this paper, in order to study the seismic performance of high-strength concrete filled square steel tube column with inner CFRP circular tube frame structure, effects of different material allocation of structur- al seismic performance are studied. Eight floors three spans high-strength concrete filled square steel tube column with inner CFRP circular tube-I shaped steel beam frame structure is simulated by OpenSeesNaviga- tor software for Pseudo-static pushover analysis. In addition, four kinds of configuration parameters（ strength of steel, steel ratio, strength of concrete and CFRP layers） are used to simulate the frame structure and pseu- do-static pushover analysis could not only affect the bearing capacity, stiffness and ductility of the coupled column, but also affect its capability in second order through an altered constitutive relation gaining from the restraint of the steel tube to the concrete. It could be concluded that in the structure design, the minimum of the stiffness ratio between beam and column should be confined by controlling four configuration parameters mentioned in this paper to improve the seismic performance of the coupled column and make sure that the column helps the beam for earthquake resistance upon the premise of a plastic failure appearing in structure.