| 应用OpenSees模拟钢管混凝土不等跨框架抗震性能 |
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| 引用本文： | 刘晓强,,许成祥,李蕾,杨曌.应用OpenSees模拟钢管混凝土不等跨框架抗震性能[J].世界地震工程,2021,0(3):111-118. |
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| 作者姓名： | 刘晓强 许成祥 李蕾 杨曌 |
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| 作者单位： | 1. 武汉科技大学 城市建设学院, 湖北 武汉 430065;2. 潍坊科技学院 建筑与艺术学院, 山东 潍坊 262700 |
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| 摘 要： | 基于一榀方钢管混凝土柱-H型钢梁不等跨平面框架的抗震性能试验，应用OpenSees有限元软件，模拟了低周反复荷载作用下框架的荷载-位移曲线，并对其抗震性能影响参数进行分析。研究结果表明:OpenSees中塑性铰纤维单元模拟栓焊连接的H型钢梁具有合理性。混凝土强度对框架的抗震性能影响较小，提高钢材强度可以有效提升框架结构的承载力和延性，其中Q345具有较高的性价比。柱截面宽厚比越小，框架承载力越高。轴压比增大会对框架抗震性能产生不利影响，工程中应避免出现高轴压比。在钢管混凝土不等跨框架结构设计中，钢梁跨度要综合考虑梁截面抗弯能力和梁柱线刚度比，其变梁异型中节点宜选择合适的梁高比。
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| 关 键 词： | 钢管混凝土 不等跨框架 OpenSees 抗震性能 梁高比 |
Application of OpenSees on calculating lateral force-displacement hysteretic curves of concrete-filled steel tubular frame with unequal spans |
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| LIU Xiaoqiang,' target="_blank" rel="external">,XU Chengxiang,LI Lei,YANG Zhao.Application of OpenSees on calculating lateral force-displacement hysteretic curves of concrete-filled steel tubular frame with unequal spans[J].World Information On Earthquake Engineering,2021,0(3):111-118. |
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| Authors: | LIU Xiaoqiang " target="_blank">' target="_blank" rel="external"> XU Chengxiang LI Lei YANG Zhao |
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| Institution: | 1. School of Urban Construction, Wuhan University of Science and Technology, Wuhan 430065, China;2. School of Architecture and Art, Weifang University of Science and Technology, Weifang 262700, China |
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| Abstract: | Based on a destructive test on a concrete-filled steel tubular plane frame with symmetric spans under low cyclic loading, A numerical model of the frame was established in OpenSees software to calculate the lateral force-displacement hysteretic curve and analyze the prominent parameters on seismic performance. The results indicate that the element beam with hinge in the OpenSees can properly simulate the H-beam with bolted-welded connection. The influence of the core concrete strength of frame on the seismic behavior is non-significant, and the increase of axial compression ratio has a negative effect on the seismic performance of the frame. With the increase of steel yeild strength,the bearing capacity and ductility of the frame can both be improved effectively, and Q345 is the most cost-effective choice. The bearing capacity of frame increases with the reduction of width-thickness ratio. The frame with high axial compression ratio should be paid more attention in the design. Suitable the depth ratio of beams should be selected for CFST frame with unequal spans, which is more favorable for seismic resistance. |
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| Keywords: | concrete-filled steel tube (CFST) frame structure with unequal spans OpenSees seismic behavior depth ratio of beams |
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