Cyclic combined bending-torsion behaviour of reinforced concrete-filled thin-walled corrugated steel tubes

IF 6.6 1区工程技术 Q1 ENGINEERING, CIVIL Thin-Walled Structures Pub Date : 2025-04-01 Epub Date: 2025-01-08 DOI:10.1016/j.tws.2025.112932

Hua Yang , Yong Fang , Ligui Yang

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Abstract

Reinforced concrete-filled thin-walled galvanized corrugated steel tube (RCFCST) is a novel composite member that is particularly proposed to strengthen the seismic and anti-corrosive performance of conventional reinforced concrete (RC) members. The individual compressive, flexural, shear, and torsional behaviour of such members have been addressed previously. In practice, the combined loading conditions are a common occurrence when subjected to winds or earthquakes; however, the cyclic combined bending-torsion behaviour of the proposed RCFCSTs is unclear and the correlation relationship between the cyclic flexural and torsional bearing capacities has not been determined. This paper therefore presents an investigation of the RCFCSTs under cyclic combined bending-torsion loads experimentally. The failure modes, hysteretic curves, ductility, energy dissipation capacity, and stiffness/strength degradations are analyzed comparably. The dependence of the seismic behaviour of RCFCSTs on both the torsion-to-bending moment ratios and torsional directions has been explained. The cumulative damage effects due to the cyclic loading mode have been carefully addressed by comparing them with the previous monotonic tests. The applicability of the simplified calculation methods for the correlation relationship between ultimate bending moments and ultimate torques is examined for the proposed RCFCST member.

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钢筋混凝土填充薄壁波纹钢管的循环组合弯曲-扭转性能

薄壁镀锌波纹钢管钢筋混凝土是一种新型的复合结构构件，是专门为增强传统钢筋混凝土（RC）构件的抗震和防腐性能而提出的。单独的压缩，弯曲，剪切和扭转的行为，这些成员已经解决了以前。在实践中，当受到风或地震的影响时，组合荷载条件是常见的；然而，所提出的rcfcst的循环组合弯曲-扭转行为尚不清楚，循环弯曲和扭转承载力之间的相关关系尚未确定。因此，本文对循环弯曲-扭转复合荷载作用下的混凝土混凝土进行了试验研究。对其破坏模式、滞回曲线、延性、耗能能力和刚度/强度退化进行了比较分析。解释了rcfcst的抗震性能与扭转弯矩比和扭转方向的关系。通过与以往的单调试验进行比较，仔细分析了循环加载模式造成的累积损伤效应。对所提出的RCFCST构件进行了极限弯矩与极限扭矩相关关系简化计算方法的适用性检验。

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来源期刊

Thin-Walled Structures 工程技术-工程：土木

CiteScore

9.60

自引率

20.30%

发文量

801

审稿时长

66 days

期刊介绍： Thin-walled structures comprises an important and growing proportion of engineering construction with areas of application becoming increasingly diverse, ranging from aircraft, bridges, ships and oil rigs to storage vessels, industrial buildings and warehouses. Many factors, including cost and weight economy, new materials and processes and the growth of powerful methods of analysis have contributed to this growth, and led to the need for a journal which concentrates specifically on structures in which problems arise due to the thinness of the walls. This field includes cold– formed sections, plate and shell structures, reinforced plastics structures and aluminium structures, and is of importance in many branches of engineering. The primary criterion for consideration of papers in Thin–Walled Structures is that they must be concerned with thin–walled structures or the basic problems inherent in thin–walled structures. Provided this criterion is satisfied no restriction is placed on the type of construction, material or field of application. Papers on theory, experiment, design, etc., are published and it is expected that many papers will contain aspects of all three.