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《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

卷:

36卷

期数:

2019年02期

页码:

30-38

栏目:

出版日期:

2019-03-26

文章信息/Info

Title:

Experiment on Seismic Behavior of Cold-formed Thin-walled Steel Walls with Diagonal Braces

文章编号:

1673-2049(2019)02-0030-09

作者:

王宇航^1,2,邓 锐^1,2,姚欣梅³,邹昱瑄³,石 宇^1,2

(1. 重庆大学 山地城镇建设与新技术教育部重点实验室,重庆 400045; 2. 重庆大学 土木工程学院,重庆 400045; 3. 长安大学 建筑工程学院,陕西 西安 710061)

Author(s):

WANG Yu-hang^1,2, DENG Rui^1,2, YAO Xin-mei³, ZOU Yu-xuan³, SHI Yu^1,2

(1. Key Laboratory of New Technology for Construction of Cities in Mountain Area of Ministry of Education, Chongqing University, Chongqing 400045, China; 2. School of Civil Engineering, Chongqing University, Chongqing 400045, China; 3. School of Civil Engineering, Chang'an University, Xi'an 710061, Shaanxi, China)

关键词:

冷弯薄壁型钢墙体;  斜撑;  抗震性能;  螺钉间距;  延性;  耗能

Keywords:

cold-formed thin-walled steel wall;  diagonal brace;  seismic performance;  screw spacing;  ductility;  energy dissipation

分类号:

TU392.1

DOI:

-

文献标志码:

A

摘要:

为了研究带斜撑冷弯薄壁型钢墙体的抗震性能,对4面冷弯薄壁型钢墙体足尺模型进行水平低周反复加载试验,考察斜撑、螺钉间距、端柱承载力对组合墙体抗震性能的影响,总结了各试件的破坏过程和主要破坏特征,分析了墙体的滞回曲线、骨架曲线、刚度退化和耗能等抗震性能指标。结果表明:增加斜撑能够有效提高冷弯薄壁型钢墙体承载力、刚度和耗能能力,但是斜撑和横撑连接节点比较薄弱,连接处横撑翼缘较早发生屈曲,使得斜撑对墙体抗侧性能的提高有限,如果能加强节点区构造,则墙体的抗侧性能能够进一步提升; 墙面板周边螺钉间距50 mm的墙体相对于螺钉间距100 mm的墙体承载力、刚度和耗能能力提高较大,但延性有所下降; 在墙面板周边螺钉间距50 mm的情况下,对端柱进行了加强,延性和耗能能力却下降明显,说明墙面板的整体性对墙体抗侧性能影响较大; 在减小螺钉间距的同时,需要对面板拼接处进行加强或改变拼接方式,防止面板相互挤压而导致脆性破坏。

Abstract:

In order to study the seismic behavior of cold-formed thin-walled steel walls with diagonal braces, horizontal low cyclic loading tests for four full scale models of cold-formed thin-walled steel walls were conducted. The effects of diagonal bracing, screw spacing and chord stud bearing capacity on the seismic performance of the walls were investigated. The failure process and main failure characteristics of all specimens were described, and the hysteresis curves, skeleton curves, lateral stiffness degradation and energy dissipation capacity were discussed. The results show that the arrangement of diagonal bracings result in an effective improvement of the load bearing capacity, stiffness, and energy dissipation capacity of walls. However, the diagonal braces increase the lateral performance limitedly, because the connection between the diagonal brace and the transverse brace is weak and the buckling of transverse braces occurs early. As a results, strengthening the joint construction can improve the lateral performance of wall furtherly. For the wall panel with a peripheral screw spacing of 50 mm compared with that of 100 mm, the load-bearing capacity, stiffness and energy dissipation of the wall are improved obviously, but the ductility is decreased. In the case that the wall panel with a peripheral screw spacing of 50 mm and the chord stud is strengthened, the ductility and energy dissipation decrease significantly. The integrity of the wall panel has a great impact on the lateral performance of the wall. In order to prevent the brittle failure, it is necessary to strengthen or change the splicing manner of the panel splicing while reducing the screw spacing.

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相似文献/References:

备注/Memo

备注/Memo:

收稿日期:2018-11-20
基金项目:国家重点研发计划项目(2016YFC0701201); 国家自然科学
基金项目(51678060)
作者简介:王宇航(1985-),男,重庆市人,教授,博士研究生导师,工学博士,博士后,E-mail:wangyuhang@cqu.edu.cn。

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更新日期/Last Update: 2019-03-27