【摘要】 利用OpenSEES有限元平台中的Beam-Column Joint节点单元和梁柱纵筋粘结滑移单元,建立了考虑梁柱节点模型的混凝土框架结构有限元计算模型,分析了国内研究者已完成的两榀两层双跨混凝土框架结构在低周反复荷载作用下的试验,计算得到的滞回曲线和骨架曲线与试验曲线吻合良好。在此基础上,还对国内研究者已完成的一榀两层双跨混凝土框架结构的拟动力试验进行了模拟分析,模拟得到的结构位移时程反应曲线和结构底层层间恢复力曲线与试验曲线基本一致。分析表明考虑梁柱节点模型的混凝土框架结构有限元计算模型能够较好地反映混凝土框架结构在低周反复荷载与地震荷载作用下梁柱节点处纵筋的粘结滑移特性和整体结构各阶段的滞回性能,从而验证了OpenSEES有限元平台中的Beam-Column Joint节点单元和梁柱纵筋粘结滑移单元在混凝土框架结构抗震性能分析中的适用性,为研究混凝土框架结构的抗震性能提供一条简便途径。更多还原

【Abstract】 The author utilize the Beam-Column Joint element and bond-slip element of the finite element platform OpenSEES,establishing the concrete frame finite calculation model which considering beam-column joint models,analysing two Two-Bay Two-Storey concrete frames under low cycle loading which tested by domestic researchers,The calculated hysteresis curves and skeleton curves agree well with experiment results. The author also simulate pseudo-dynamic test of one Two-Bay Two-Storey concrete frame. The calculated displacement time histories and hysteresis loops of 1 ststory shear-story drift agree with test results. The analytic results indicate that the concrete frame finite calculation model which considering beam-column joint models can effectively reflect bond-slip of longitudinal reinforcement at joints and hysteretic performance of integral structure at every stages,which proving applicability of Beam Column Joint element and bond-slip element of OpenSEES in seismic performance analyse of concrete frames,providing a convenient way for the research on seismic performance of concrete frame structures.更多还原