Fragility curves for reinforced concrete (RC)/steel vertical hybrid frame structure under mainshock–aftershock sequences

IF 3 Q2 ENGINEERING, CIVIL

Journal of Structural Integrity and Maintenance Pub Date : 2023-06-19 DOI:10.1080/24705314.2023.2220946

B. Ghanbari, M. Fathi, A. Akhaveissy

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引用次数: 1

Abstract

ABSTRACT A reinforced concrete (RC)/steel vertical hybrid frame structure usually consists of a lower concrete structure and an upper steel structure connected in series. This study aims to derive fragility curves for RC/steel vertical hybrid frame structures under mainshock–aftershock sequences. For this purpose, a double incremental dynamic analysis (D-IDA) approach is performed to derive fragility curves for a five-story RC/steel vertical hybrid frame (a three‐story RC frame at the bottom + a two‐story steel frame at the top) under 14 real mainshock– aftershock earthquake ground motions. The fragility curves obtained for RC/steel frame are also compared with fragility curves for a five‐story purely RC frame. Also, residual capacity diagrams are provided for RC/steel and purely RC frames based on the D-IDA results. The results show that RC/steel frame structure has larger collapse capacity than that of the purely RC frame structure, and can diminish collapse probability by 33% compared to purely RC frame structure.

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钢筋混凝土（RC）/钢垂直混合框架结构在主震-余震序列下的脆性曲线

钢筋混凝土/钢竖向混合框架结构通常由下部混凝土结构和上部钢结构串联组成。本研究旨在推导RC/钢垂直混合框架结构在主震-余震序列下的脆性曲线。为此，采用双增量动力分析（D-IDA）方法推导五层钢筋混凝土/钢垂直混合框架（底部为三层钢筋混凝土框架）的脆性曲线 + 顶部的两层钢架）。将钢筋混凝土/钢框架获得的脆性曲线与五层纯钢筋混凝土框架的脆性曲线进行了比较。此外，基于D-IDA结果，还提供了钢筋混凝土/钢框架和纯钢筋混凝土框架的剩余承载力图。结果表明，钢筋混凝土/钢框架结构比纯钢筋混凝土框架结构具有更大的倒塌能力，与纯钢筋混凝土结构相比，可降低33%的倒塌概率。

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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来源期刊

Journal of Structural Integrity and Maintenance ENGINEERING, CIVIL-

CiteScore

3.90

自引率

9.50%

发文量