Experimental study on the seismic behavior of RC columns improved with central large-diameter butted steel rods

IF 1.4 4区工程技术 Q3 ENGINEERING, CIVIL Latin American Journal of Solids and Structures Pub Date : 2022-01-01 DOI:10.1590/1679-78257290

Hanming Zhang, Jie Luo, Jianchun Xiao, J. Chen, Zhuoqun Liu, Yi Zhang, Zongli Luo, Hong Zhang

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Abstract

A reinforced concrete (RC) column improved with central large-diameter butted steel rods (CLBSR column) has been proposed to increase the limit value of the axial compression ratio. This paper presents the seismic behavior analysis of CLBSR columns subjected to low-cycle reciprocating loading. The CLBSR columns were also compared with the RC column improved with central large-diameter steel rods (CLSR column) and the RC column improved with central reinforcement bars (CRB column) under the same experimental conditions. The typical failure modes, hysteretic curves, skeleton curves, stiffness degradation, and energy dissipation capacity were all investigated. The improved PARK damage model obtained the corresponding relationships between the damage indices and the damage state of each column. The test results indicated that the CLBSR columns and CLSR columns had similar seismic behavior, but were slightly inferior to the CRB columns. Overall, the butt joint of large-diameter steel rods had little effect on the seismic behavior.

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中央大直径对接钢杆加固钢筋混凝土柱抗震性能试验研究

为了提高轴压比的极限值，提出了一种中央大直径对接钢棒改进的钢筋混凝土柱(CLBSR柱)。本文对CLBSR柱在低周往复荷载作用下的抗震性能进行了分析。在相同的试验条件下，将CLBSR柱与中心大直径钢筋加固的RC柱(CLSR柱)和中心钢筋加固的RC柱(CRB柱)进行了比较。研究了典型破坏模式、滞回曲线、骨架曲线、刚度退化和耗能能力。改进的PARK损伤模型得到了各列损伤指标与损伤状态的对应关系。试验结果表明，CLBSR柱和CLSR柱具有相似的抗震性能，但略逊于CRB柱。总体而言，大直径钢棒对接对结构抗震性能影响不大。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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