摘要
体外预应力自复位钢筋混凝土框架(EPSCF)结构采用梁柱铰接节点,通过体外后张拉预应力筋提供结构侧向刚度和恢复力。通过静力分析推导出体外预应力自复位框架抗侧刚度理论公式,确定了预应力钢筋的放置角度与配筋量。建立EPSCF结构有限元分析模型,进行结构的非线性时程分析,对比分析了三种不同预应力筋布置方案的结构加速度响应、层间位移响应以及结构构件内力响应。分析结果表明:不同预应力筋布置方案下的结构加速度响应、位移响应基本一致,而结构主要构件内力响应值存在较大差异。通过分析选出合理的预应力筋布置方案,为体外预应力自复位结构的进一步研究提供了参考。
The external prestressing self-centering frame （EPSCF） introduces hinges as the beam-column joints, in which post-stressed tendons are used to provide the lateral stiffness and the restoring forces of the frame. The EPSCF＇ s lateral stiffness formula is deduced, then the placement angle and the amount of prestressed tendons are determined. The non-linear time history analysis of the earthquake responses of EPSCF is carried out with finite element method. Acceleration response, displacement response, and internal forces of three frames with different layout schemes of prestressed tendons are compared and analyzed, which dedicates that these three frames are with almost the same acceleration and displacement responses, but obvious different internal forces in components. A reasonable layout scheme of prestressed tendons is obtained and would be used to guide the further research of EPSCF.
出处
《结构工程师》
北大核心
2017年第2期26-33,共8页
Structural Engineers
基金
国家自然科学基金资助项目(51678453)
关键词
体外预应力自复位结构
有限元分析
方案优化
动力响应
构件内力
external prestressed self-centering frame, finite element method, scheme optimization, dynamic response, internal force
