[1]吴京,洪曼,郭立行.角钢拼接十字形无焊核心的高性能屈曲约束支撑试验研究[J].东南大学学报(自然科学版),2017,47(4):743-750.[doi:10.3969/j.issn.1001-0505.2017.04.019]
　Wu Jing,Hong Man,Guo Lihang.Experimental study on high-performance welding-free cruciform-shaped buckling-restrained braces with angle steel splicing core[J].Journal of Southeast University (Natural Science Edition),2017,47(4):743-750.[doi:10.3969/j.issn.1001-0505.2017.04.019]
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角钢拼接十字形无焊核心的高性能屈曲约束支撑试验研究()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
47
期数:
2017年第4期
页码:
743-750
栏目:
土木工程
出版日期:
2017-07-20

文章信息/Info

Title:
Experimental study on high-performance welding-free cruciform-shaped buckling-restrained braces with angle steel splicing core
作者:
吴京1; 洪曼1; 郭立行2
1东南大学混凝土与预应力混凝土教育部重点实验室, 南京 210096; 2福建绿城建筑设计有限公司, 厦门 361008
Author(s):
Wu Jing1;  Hong Man1;  Guo Lihang2
1Key Laboratory of Concrete and Prestressed Concrete Structures of Ministry of Education, Southeast University, Nanjing 210096, China
2Fujian Green City Architectural Design Co., Ltd, Xiamen 361008, China
关键词:
屈曲约束支撑;  无焊十字形截面;  低周疲劳;  滞回性能
Keywords:
buckling-restrained brace;  welding-free cruciform-shaped core;  low cycle fatigue;  hysteretic behavior
分类号:
TU375.4
DOI:
10.3969/j.issn.1001-0505.2017.04.019
摘要:
为避免十字形截面屈曲约束支撑的内芯在焊接后对低周疲劳性能的不利影响,提出核心部件采用角钢拼接的无焊十字形截面.进行了3根屈曲约束支撑试件的拟静力滞回性能试验,其中无焊核心部件采用黏钢胶拼接4根等边热轧角钢的方法,避免焊接或直接铸造试件中不可控缺陷的产生.试验结果表明,该类支撑的滞回性能稳定,第1根角钢断裂前,试件的累积塑性变形能力远高于铸造十字形截面,比端部焊接加劲肋的一字形核心屈曲约束支撑也有所提高.在第1根角钢断裂后,剩余截面仍具有相当的耗能能力.3根试件的拉压不平衡系数均在1.1以下,满足AISC规定的1.3限值要求.
Abstract:
To avoid the reduction of low cycle fatigue performance due to welding in the steel core of cruciform cross-section of conventional buckling-restrained braces(BRBs), a new type of welding-free cruciform-shaped BRB with angle steel splicing core was developed. Uniaxial quasi-static cyclic tests for three BRB specimens were carried out to investigate the hysteretic behavior. The steel core of BRB consists of four combined angle steels with equal sides to form a welding-free cruciform cross-section using structure glue, to avoid uncontrollable defects from welding or directly casting. The test results indicate that this type of BRB specimens has stable hysteretic performance. Before the fracture of the first angle steel, the cumulative plastic deformation capacity of the specimens is much higher than that of the casting cruciform cross-section BRB and better than that of the rectangle cross-section BRB with end welding stiffening rib. After the fracture of the first angle steel, the rest sections of angle steel still have energy dissipation capacity. The tension and compression coefficients of the three specimens are all below 1.1, so the limit value of AISC 1.3 is satisfied.

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备注/Memo

备注/Memo:
收稿日期: 2016-11-27.
作者简介: 吴京(1971—),男,博士,教授,博士生导师,seuwj@seu.edu.cn.
基金项目: 国家重点研发计划资助项目(2016YFC0701400)、国家自然科学基金资助项目(51278105).
引用本文: 吴京,洪曼,郭立行.角钢拼接十字形无焊核心的高性能屈曲约束支撑试验研究[J].东南大学学报(自然科学版),2017,47(4):743-750. DOI:10.3969/j.issn.1001-0505.2017.04.019.
更新日期/Last Update: 2017-07-20