Analysis of thin-walled steel RHS columns filled with concrete under long-term sustained loads
Analysis of thin-walled steel RHS columns filled with concrete under long-term sustained loads
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DOI：
10.1016/s0263-8231(03)00029-6
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发表时间：
2003-09-01
影响因子：
6.4
通讯作者：
Yang, YF
中科院分区：
文献类型：
--
作者：
Han, LH;Yang, YF
本研究试图通过ACI规范（ACI委员会209，1992）[1]提出的模型预测薄壁RHS（矩形空心截面）混凝土柱的时变性能。提出了一个理论分析模型，以解释持续荷载下RHS型钢混凝土柱的收缩和徐变效应，该模型是短期荷载分析的发展（Han等人，2001 a）[2]。将该模型计算结果与试验结果进行了比较，结果表明该模型计算结果与试验结果吻合较好。本文的主要目的有三个：第一，报告了一系列的长期持续荷载下的行为，除了提供进一步的测试的静力极限强度的组合柱的钢管混凝土柱的试验。其次，分析了含钢率、长期荷载水平、长细比、材料强度和高宽比等参数对矩形钢管混凝土柱承载力的影响。最后，考虑了考虑长期荷载效应的矩形钢管混凝土柱的极限承载力计算公式，该公式应适合于纳入建筑规范。(C)2003爱思唯尔科技有限公司。保留所有权利。
The present study is an attempt to predict the time-dependent behavior of concrete-filled thin walled steel RHS (rectangular hollow section) columns by means of a model that is proposed by the ACI Specifications (ACI Committee 209,1992) [1]. A theoretical model of analysis to account for shrinkage and creep effects on concrete-filled steel RHS columns under sustained loading is presented, and is a development of the analysis used for short-term loading (Han et al, 2001a) [2]. A comparison of results calculated using this model shows good agreement with test results. The main objectives of this paper were threefold: firstly, to report a series of tests on the behavior of concrete-filled steel RHS columns under long-term sustained loading, in addition to providing further tests on the static ultimate strength of the composite columns. Secondly, to analyze influence of several parameters, such as changing steel ratio, long-term sustained load level, slenderness ratio, strength of the materials and depth-to-width ratio on the capacities of the concrete-filled steel RHS columns. And finally, to develop formulas for the calculations of the ultimate strength of the concrete-filled steel RHS columns with long-term sustained loading effects are considered, such formulas should be suitable for incorporation into building codes. (C) 2003 Elsevier Science Ltd. All rights reserved.