摘要
为研究新型PEC柱-钢梁组合框架中层边节点摩擦耗能部分自复位连接的抗震性能,考虑PEC柱的布置方式、PEC柱轴压力、预拉杆预应力、加强型盖板厚度与长度、对穿螺栓设置方式等设计参数,利用有限元商业软件ABAQUS建立对应系列数值模型试件并进行循环荷载下的抗震性能的数值模拟。基于数值模拟结果 ,对各试件的承载能力、耗能能力、自复位功效和节点区传力机理进行了对比分析。结果显示,PEC柱布置方式引起的梁柱刚度匹配的改变和柱轴压力引起的二阶效应相应改变自复位连接的受力发展进程,但对部分自复位传力机理影响甚微;Ma/Mb设计取值对节点连接的自复位功效和耗能能力影响显著,建议合理取值范围为0.40-0.70;所有试件残余转角均不超过自复位残余转角限值0.005 rad,而实际工程作法II型试件在达到预定设计中震侧移角限值0.02 rad后,连接转化为承压型传力模式,随后进一步发挥主体构件梁的受力性能,表明该连接实现了良好的耗能能力、自复位效果和安全冗余度有机统一的性能设计目标。
To investigate the seismic performance innovative PEC column-steel beam inter-story exterior joint with the post-tensioned friction damped connection, several design parameters such as the PEC column layout, the axial compression, the pre-stress of post-tensioned bar, the thickness and the length of reinforced cover plate and the layout of high-strength penetrating bolts were taken into account, and the finite element software ABAQUS was adopted to build a serial models of specimens to simulate their hysteretic behaviors under the lateral cyclic loading. Based on the numerical simulation data, the paper analyzed the specimens＂ performance including the carrying capacity, energy-dissipation capacity, self-centering function and force-transferring mechanism of the panel zone. The results showed that the PEC column layout and the second-order due to the axial compression only affected the mechanical process but not its self-centering function; the predetermined design value of Ma/Mb was critical for self-centering function and energy-dissipation capacity, and its rational range of 0.40-0.70 was suggested; the residual rotational angles of all specimens were less than 0.005 tad, and all partial self-centering connections of II specimen transferred to the bearing type connection when the rotational angle surpassed 0.02 tad at the design earthquake level, and the mechanical performance of steel beam was further developed, correspondingly the performance-based design object of the compatibility between the partial self-centering, the energy-dissipation and the safety redundancy was achieved.
出处
《苏州科技学院学报（工程技术版）》
CAS
2016年第3期10-17,共8页
Journal of Suzhou University of Science and Technology （Engineering and Technology）
基金
国家自然科学基金项目(51478286)
关键词
新型卷边PEC柱
部分自复位连接
摩擦耗能
抗震性能
数值模拟
Innovative PEC column
partial self-centering connection
friction energy-dissipation
seismic performance
numerical simulation
