Flexural behaviour of concrete-filled stainless steel CHS subjected to static loading
Flexural behaviour of concrete-filled stainless steel CHS subjected to static loading
复制标题
不锈钢CHS混凝土静载弯曲性能
DOI：
10.1016/j.jcsr.2017.09.009
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发表时间：
2017-12-01
影响因子：
4.1
通讯作者：
Wang, Lipeng
中科院分区：
文献类型：
--
作者：
Chen, Yu;Wang, Kai;Wang, Lipeng
本文介绍了不锈钢圆钢管混凝土面内受弯性能的试验方案。共进行了27个试件的试验，包括18个不锈钢填充混凝土的CHS受弯构件和9个空不锈钢CHS受弯构件。给出了试件的极限强度、破坏模式、抗弯刚度、延性、弯矩-跨中挠度曲线、总挠度曲线和应变分布曲线。结果表明，将混凝土沿试件全长填充到试件中，可以显著提高空心钢CHS受弯构件的极限强度、初始刚度和延性，且随着CHS管厚度的增加，提高幅度增大。此外，混凝土强度对不锈钢钢管混凝土受弯构件的极限强度、初始刚度和延性影响不大。将试验得到的钢管不锈钢混凝土面内受弯的初始抗弯刚度和正常使用极限状态的抗弯刚度与现行AIJ标准、BS 5400、EUROCORD 4和AISC规范计算的设计抗弯刚度进行了比较。结果表明，现行设计规范对钢管混凝土面内受弯时的初始抗弯刚度和正常使用极限状态下的抗弯刚度均不保守，计算结果离散性大。(C)2017爱思唯尔有限公司。保留所有权利。
This paper presents a test program on flexural behaviour of concrete-filled stainless steel circular hollow section (CHS) tubes under in-plane bending. A total of 27 specimens including 18 concrete-filled stainless steel CHS flexural members and 9 empty stainless steel CHS flexural members were tested. The ultimate strengths, failure modes, flexural stiffness, ductility, bending moment-midspan deflection curves, overall deflection curves and strain distribution curves of test specimens are reported. It is demonstrated that the ultimate strength, initial stiffness and ductility of empty stainless steel CHS flexural members are significantly enhanced by filling the concrete in the specimen along its full length, The enhancement is increased with the increase of the thickness of the CHS tube. Furthermore, the concrete strength has little influence on the ultimate strength, initial stiffness and ductility of concrete-filled stainless steel CHS flexural members. The test flexural stiffness including both initial flexural stiffness and flexural stiffness at the serviceability limit state of concrete-filled stainless steel CHS tubes under in-plane bending were compared with the design flexural stiffness calculated using the current AIJ standard, BS 5400, Eurocode 4 and AISC specification for concrete-filled steel tubes. It is shown from the comparison that the current design rules are all unconservative for initial flexural stiffness and flexural stiffness at the serviceability limit state of concrete-filled stainless steel CHS tubes under in-plane bending with high scatter of predictions. (C) 2017 Elsevier Ltd. All rights reserved.