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部分包裹混凝土组合柱-钢梁端板连接框架结构抗震性能试验研究*
赵根田,王丽娜,狄昊
摘 要

(内蒙古科技大学土木工程学院, 包头 014010)

[摘要]为了研究端板厚度和柱翼缘厚度对部分包裹混凝土组合柱(PEC柱)-型钢梁端板连接框架结构抗震性能的影响,对3榀PEC柱型钢梁端板连接框架进行低周反复荷载试验,得出各框架试件的滞回曲线、极限承载力、转角延性系数以及初始刚度等抗震性能数据。试验表明:端板厚度由12mm增加到20mm,试件承载力增加2%,试件初始刚度提高22-44%,转角延性系数提高10%,耗能能力增加12-87%。柱翼缘厚度由12mm增加到16mm,试件最大承载力提高13-00%,初始刚度提高50-77%,耗能能力增加9-80%,但转角延性系数降低3-4%。增加柱翼缘厚度可以明显提高框架的极限承载力。端板和柱翼缘厚度越大,框架节点初始转动刚度越大。增加端板厚度可以明显改善框架节点的转角延性,增加柱翼缘厚度会降低框架的转角延性。为探究上述规律的一般适用性,以试验为基础,进行有限元模拟拓展分析,得到与试验类似结论。

[关键词]PEC柱; 框架结构; 端板连接; 抗震性能

中图分类号:TU375-2文献标识码:A文章编号:1002-848X(2018)06-0068-08

 

Experimental research on frame seismic behavior of the PEC column-steel beam connected by end plate

Zhao Gentian, Wang Lina, Di Hao

(School of  Civil Engineering, Inner Mongolia University of Science & Technology,  Baotou 014010, China)

Abstract:In order to study the effect of the thickness of end plate and column flange on seismic performance of frame of the partially encased concrete column(PEC column)-steel beam connected by end plate, low cyclic loading tests of three frame specimens of PEC column-steel beam were conducted. The hysteretic curves, ultimate strength, angle ductility, initial rigidness and other relevant seismic performance indicators were carried out. The test results show that, as the end plate thickness increases from 12mm to 20mm, the ultimate load of framework rises by 2%, initial rigidness increases by 22-44%,angle ductility coefficient and cost energy increases by 10% and 12-87% respectively. As the column flange thickness increases from 12mm to 16mm, the ultimate load of framework increases by 13%, the initial rigidness and cost energy increase by 50-77% and 9-80% respectively,but the angle ductility coefficient decreases by 3-4%. Increasing the thickness of column flange can observably improve the bearing capacity of the frame. The more the thickness of end plate and column flange, the greater the frame node initial stiffness. Increasing the thickness of end plate can increase the turn ductility of frame nodes. The optimization node ductility by increasing the column flange thickness is less. Based on experimental research, the finite element simulation was carried out to explore the general nature of the above rules. And the conclusion is similar to the experiment.

Keywords:partially encased concrete column(PEC column); frame structure; end plate connection; seismic performance

 

*国家自然科学基金项目(51268042)。

 

作者简介:赵根田,博士,教授,Email:zhaogentian93110@sina.com。

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