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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:

64-76

栏目:

出版日期:

2019-03-26

文章信息/Info

Title:

Analysis of Influence Factors on Hysteretic Behavior of Weak-axis Square Tubular Web RBS Connection

文章编号:

1673-2049(2019)02-0064-13

作者:

卢林枫¹,艾 龙¹,郝振奋²,张廷强¹,陈李锰¹

(1. 长安大学 建筑工程学院,陕西 西安 710061; 2. 北京特种工程设计研究院,北京 100028)

Author(s):

LU Lin-feng¹, AI Long¹, HAO Zhen-fen², ZHANG Ting-qiang¹, CHEN Li-meng¹

(1. School of Civil Engineering, Chang'an University, Xi'an 710061, Shaanxi, China; 2. Beijing Special Engineering Design and Research Institute, Beijing 100028, China)

关键词:

节点域;  弱轴连接;  方钢管;  塑性铰;  抗震性能

Keywords:

joint region;  weak-axis connection;  square steel tube;  plastic hinge;  seismic behavior

分类号:

TU391

DOI:

-

文献标志码:

A

摘要:

基于箱形节点域加强式工字形梁柱弱轴连接的基本形式,提出了一种新型的方管束腹板削弱(STW-RBS)型弱轴连接,这种连接是在塑性铰预期出现的位置用方钢管来取代梁平腹板而达到削弱的目的。为了研究该新型连接的抗震性能,设计了8个STW-RBS型弱轴连接节点试件进行有限元变参数(钢管中心距蒙皮板距离L、方钢管的边长A以及方钢管的厚度S)分析,并且设计了一个AW-RBS(Accordion Web RBS)型弱轴连接节点进行对比分析,主要从节点的滞回曲线、骨架曲线、刚度退化曲线、延性系数以及塑性转动能力等分析节点的抗震性能。结果表明:STW-RBS型弱轴连接节点的削弱参数取值范围为L≤0.55h,A≥0.6b_f,S=t_w(h为梁截面高度,b_f为梁翼缘宽度,t_w为梁腹板厚度); 在参数选取合理的情况下,STW-RBS型弱轴连接节点的延性系数可以达到6.0且塑性转动能力不小于0.06 rad,塑性铰出现在方钢管处,钢柱和节点域基本处于弹性状态,满足“强柱弱梁,强节点弱构件”的抗震设计理念; STW-RBS型弱轴连接节点与AW-RBS型弱轴连接节点的抗震性能基本一致。

Abstract:

Based on the basic form of box-strengthened joint region connection for the weak-axis of I-section column, a new type of steel frame beam-column weakening connection, named as STW-RBS was presented, which could weaken the beam's rigidity by using square steel tube to replace the beam web at the expected position of the plastic hinge. In order to study the seismic performance of the new-type connection, seven STW-RBS specimens were designed for finite element parametric(the side length and thickness of the square steel tube and the distance from the steel pipe center to the surface of the skin plate)analysis and one TW-RBS type weak-axis joint specimens for comparative analysis. The seismic behavior of the joints was analyzed mainly from the hysteretic curve, skeleton curve, stiffness degeneration curve, ductility coefficient and plastic rotation ability. The results show that the weakening parameter of STW-RBS type weak axis connection is l≤0.55 h, a≥0.6b_f, s=t_w(h is beam section height, b_f is flange width and t_w is beam web thickness). If the above parameters are reasonable, the ductility coefficient of the STW-RBS weak-axis connection can reach 6.0 and the plastic rotational capacity is not less than 0.06 rad; the plastic hinge appears in the square steel pipe place, and the steel column and nodal area are basically in the elastic state, satisfying the seismic design idea of the “strong column, weak beam and strong joint, weak component”. The seismic performance of STW-RBS type weak-axis connection node is basically same with AW-RBS type weak-axis connection node.

参考文献/References:

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备注/Memo

备注/Memo:

收稿日期:2018-10-09
基金项目:国家自然科学基金项目(51278061); 中央高校基本科研业务费专项资金项目(300102288201)
作者简介:卢林枫(1972-),男,黑龙江龙江人,教授,工学博士,E-mail:lulinfeng@chd.edu.cn。

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更新日期/Last Update: 2019-03-27