[1]方有珍,王玉玺,钮荣斌,等.T形件加强型节点PEC柱-钢梁组合框架层间倒塌机理试验研究[J].西安建筑科技大学学报(自然科学版),2016,(04):5.[doi:10.15986/j.1006-7930.2016.04. 002]
 FANG Youzhen,WANG Yuxi,NIU Rongbin,et al.Experimental study on collapse mechanism of interstory substructure of PEC column—steel beam composite frame with welded T-stud strengthened connection[J].J. Xi’an Univ. of Arch. & Tech.(Natural Science Edition),2016,(04):5.[doi:10.15986/j.1006-7930.2016.04. 002]
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T形件加强型节点PEC柱-钢梁组合框架层间倒塌机理试验研究()
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西安建筑科技大学学报(自然科学版)[ISSN:1006-6977/CN:61-1281/TN]

卷:
期数:
2016年04期
页码:
5
栏目:
出版日期:
2016-08-31

文章信息/Info

Title:
Experimental study on collapse mechanism of interstory substructure of PEC column—steel beam composite frame with welded T-stud strengthened connection
文章编号:
1006-7930(2016)04-0468-09
作者:
方有珍王玉玺钮荣斌孙国华
苏州科技学院江苏省结构重点实验室,江苏 苏州 215011
Author(s):
FANG Youzhen WANG Yuxi NIU Rongbin SUN Guohua
Jiangsu Key Laboratory of Structure Engineering, Suzhou University of Science and Technology, Suzhou 215011, China
关键词:
新型PEC柱T形件焊接加强型节点组合框架层间子结构低周反复荷载试验倒塌机理
Keywords:
Innovative PEC column welded T-stud strengthened connection interstory substructure of composite frame structure low-cycle reserved loading test collapse mechanism
分类号:
TU375.4
DOI:
10.15986/j.1006-7930.2016.04. 002
文献标志码:
A
摘要:
为研究T形件焊接加强型节点卷边PEC柱-钢梁组合框架层间倒塌机理,按1:2缩尺设计制作了1榀组合框架中间层子结构模型试件并进行拟静力试验,从试件受荷过程分析了组合框架中间层子结构的滞回特性、承载力、抗侧刚度、耗能能力、变形模式和倒塌破坏机构等抗震性能. 研究结果表明:T形件焊接加强型连接方式增强了节点连接的刚度,实现了梁塑性铰位置远离节点区和结构梁端塑性屈服耗能的设计目标;T形件预拉对穿螺栓连接有效实现了节点域混凝土斜压带传力模式,相应降低了节点区的抗剪需求,更好满足了“强节点”的抗震要求;试件沿高度刚度分布均匀,试件整体水平位移表现为理想的倒三角弯剪型变形模式;试件结构的破坏模式为中间层T形件端部梁截面形成塑性铰的塑性倒塌机构,对应层间剪切角和节点连接转角均超过大震层间侧移限值1/30,且试件承载力未出现明显下降趋势,试件结构具有良好的抗倒塌性能.
Abstract:
To investigate the collapse mechanism of innovative PEC column—steel beam composite frame with welded T-stub strengthened connection, a 1:2 scale test specimen of inter-story substructure was designed and fabricated. The test of the specimen was conducted under low-cycle reserved loading to study its seismic performances, including the hysteretic property, loading carrying capacity, lateral stiffness degradation, energy dissipation and failure mode. Test results indicated that the stiffness of connection is strengthened and the design target as plastic hinge forming location away from beam end is achieved by welded T-stud connection; the force-transfer mechanism of concrete equivalent strut in the panel zone is captured due to pre-tension penetrating bolts and t-stub; the lateral stiffness is evenly distributed along the height of the specimen lead to the ideal inverted triangle pattern of flexure-shear type for the specimen; the failure mode occurred primary induced by the plastic hinge of beam near end of T-stub, and interstory drift and connection rotations all surpass the drift limit(1/30) of maximum consideration earthquake, while the load-carrying capacity is not descending obviously, and correspondingly the specimen owns excellent collapse prevention capacity.

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备注/Memo

备注/Memo:
收稿日期:2015-10-08 修改稿日期:2016-08-01
基金项目:国家自然科学基金项目(51478286,51078247);江苏省“青蓝工程”中青年学术带头人资助和江苏省高校首批优秀中青年教师出国研修计划
作者简介:方有珍(1972?),男,教授,博士,从事组合结构抗震研究. Email:Fyz72@mail.usts.edu.cn
更新日期/Last Update: 2016-10-13