Evaluation of the seismic behavior of reinforced concrete structures with flat slab-column gravity frame and shear walls through nonlinear analysis methods

IF 2.6 2区工程技术 Q2 ENGINEERING, CIVIL

Earthquake Engineering and Engineering Vibration Pub Date : 2024-07-13 DOI:10.1007/s11803-024-2267-3

M. A. Najafgholipour, S. Heidarian Radbakhsh, E. Erfani

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引用次数: 0

Abstract

This paper presents an investigation of the seismic behavior of reinforced concrete (RC) structures in which shear walls are the main lateral load-resisting elements and the participation of flat slab floor systems is not considered in the seismic design procedure. In this regard, the behavior of six prototype structures (with different heights and plan layouts) is investigated through nonlinear static and time history analyses, implemented in the OpenSees platform. The results of the analyses are presented in terms of the behavior of the slab-column connections and their mode of failure at different loading stages. Moreover, the global response of the buildings is discussed in terms of some parameters, such as lateral overstrength due to the gravity flat slab-column frames. According to the nonlinear static analyses, in structures in which the slab-column connections were designed only for gravity loads, the slab-column connections exhibited a punching mode of failure even in the early stages of loading. However, the punching failure was eliminated in structures in which a minimum transverse reinforcement recommended in ACI 318 (2019) was provided in the slabs at joint regions. Furthermore, despite neglecting the contribution of gravity flat slab-column frames in the lateral load resistance of the structures, a relatively significant overstrength was imposed on the structures by the gravity frames.

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通过非线性分析方法评估平板柱重力框架和剪力墙钢筋混凝土结构的抗震性能

本文对钢筋混凝土（RC）结构的抗震行为进行了研究，在这些结构中，剪力墙是主要的抗侧荷载构件，并且在抗震设计程序中没有考虑平板楼板系统的参与。为此，我们在 OpenSees 平台上实施了非线性静态和时间历程分析，研究了六个原型结构（具有不同高度和平面布局）的行为。分析结果显示了板柱连接的行为及其在不同加载阶段的破坏模式。此外，还根据一些参数讨论了建筑物的整体响应，如重力平板-柱框架导致的横向超强度。根据非线性静力分析，在仅针对重力荷载设计板柱连接的结构中，板柱连接甚至在荷载的早期阶段就表现出冲孔破坏模式。但是，如果在连接区域的板上设置了 ACI 318（2019 年）建议的最小横向配筋，则会消除冲孔失效。此外，尽管忽略了重力平板-柱框架在结构抗侧荷载中的作用，但重力框架对结构施加了相对显著的超强度。

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

Earthquake Engineering and Engineering Vibration 工程技术-工程：地质

CiteScore

4.70

自引率

21.40%

发文量

1057

审稿时长

9 months

期刊介绍： Earthquake Engineering and Engineering Vibration is an international journal sponsored by the Institute of Engineering Mechanics (IEM), China Earthquake Administration in cooperation with the Multidisciplinary Center for Earthquake Engineering Research (MCEER), and State University of New York at Buffalo. It promotes scientific exchange between Chinese and foreign scientists and engineers, to improve the theory and practice of earthquake hazards mitigation, preparedness, and recovery. The journal focuses on earthquake engineering in all aspects, including seismology, tsunamis, ground motion characteristics, soil and foundation dynamics, wave propagation, probabilistic and deterministic methods of dynamic analysis, behavior of structures, and methods for earthquake resistant design and retrofit of structures that are germane to practicing engineers. It includes seismic code requirements, as well as supplemental energy dissipation, base isolation, and structural control.