Rectangular concrete-filled steel tubular beam-columns using high-strength steel: Experiments and design
Rectangular concrete-filled steel tubular beam-columns using high-strength steel: Experiments and design
复制标题
高强钢矩形钢管混凝土梁柱：试验与设计
DOI：
10.1016/j.jcsr.2016.12.016
复制
发表时间：
2017-04-01
影响因子：
4.1
通讯作者：
Xiong, Ming-Xiang
中科院分区：
文献类型：
--
作者：
Du, Yansheng;Chen, Zhihua;Xiong, Ming-Xiang
钢管混凝土柱和高强钢在建筑中的应用越来越广泛。然而，高强钢在钢管混凝土柱中的应用在许多设计规范中并没有被允许。本文对高强钢矩形钢管混凝土压弯构件的受力性能进行了试验研究。讨论了填充混凝土、偏心率和宽厚比对试件承载力的影响。利用有限元分析研究了接触行为。中国规范DB 29-57采用混凝土只承受轴向荷载，钢管承受弯矩和部分轴向荷载的假设。基于上述假设，提出了一种新的N-M相互作用方法，用于分析高强钢的塑性行为。试验结果和现行设计规范的计算结果表明，该方法具有合理的保守性，可用于高强钢矩形钢管混凝土压弯构件的设计。(C)2016爱思唯尔有限公司版权所有。
Concrete-filled steel tubular (CFT) columns and high-strength steel have been increasingly used in construction. However, the application of high-strength steel in CFT columns has not been permitted in many design codes. This paper reports an experimental investigation on the behavior of rectangular CFT beam-columns using high-strength steel. The influences of the in-fill concrete, eccentricity ratio and the width-to-thickness ratio on the resistance of the test columns are discussed. The contact behavior is studied using the finite element analysis. Chinese code DB 29-57 adopts the assumption that the concrete bears the axial load only, and the steel tube withstands the bending moment and part of the axial load. A new N-M interaction approach is developed based on the foresaid assumption to account for the plastic behavior of high-strength steel. The approach is verified by the experimental results and the available current design codes to be reasonably conservative, and it can be employed to design rectangular CFT beam-columns using high-strength steel. (C) 2016 Elsevier Ltd. All rights reserved.