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首页> 外文期刊>Journal of structural engineering >Effect of Ductile Shear Wall Ratio and Cross-Section Configuration on Seismic Behavior of Reinforced Concrete Masonry Shear Wall Buildings
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Effect of Ductile Shear Wall Ratio and Cross-Section Configuration on Seismic Behavior of Reinforced Concrete Masonry Shear Wall Buildings

机译：延性剪力比和截面形状对钢筋混凝土砌体剪力墙结构抗震性能的影响

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摘要

Reinforced masonry buildings typically have a load-bearing wall structural system. Thus, the reinforced masonry shear walls must be capable of resisting both vertical forces from gravity loads and lateral forces from seismic and wind loads. Typically, because the walls are subjected to high axial loads, ensuring the ductile response becomes challenging. A possible solution at the component level would be the utilization of walls with confined ends (i.e., walls with boundary elements) to reduce the compression zone and increase the compression strain. Another solution, which is at the system level, is the introduction of a hybrid structural system composed of two types of walls: (1) ductile walls with or without boundary elements to resist the lateral forces and part of vertical forces, and (2) gravity walls that resist only axial loads. This paper proposes a combination of both solutions (i.e., at component and system levels). Additionally, it utilizes a series of linear and nonlinear static and dynamic analyses to evaluate and quantify the effect of cross-section configuration and ductile shear wall area to total floor area (i.e., ductile shear wall ratio) on the seismic response of masonry buildings. The numerical analyses are performed by a macro model detailed to simulate the nonlinear response. The primary objective is to recommend a range of ductile shear wall ratios that optimize the design and overall performance. The study targets mid-rise and high-rise masonry buildings located in regions with moderate seismic hazard. The findings emphasize that utilizing the ductile walls with boundary elements in the proposed hybrid structural system resulted in major favorable enhancements in the structural response and optimization of the design. In addition, the results demonstrate the possibility of vertically reducing and terminating the specially detailed boundary elements, thus promoting ductile reinforced concrete masonry shear wall buildings as a competitive building system. (C) 2020 American Society of Civil Engineers.
机译：钢筋砌体建筑通常具有承重墙结构系统。因此，增强的砌体剪力墙必须能够抵抗来自重力载荷的垂直力和来自地震和风载荷的横向力。通常，由于壁承受高轴向载荷，因此确保延性响应变得充满挑战。在组件级别的一种可能的解决方案是利用具有受限端部的壁（即具有边界元素的壁）来减少压缩区域并增加压缩应变。在系统级别上的另一种解决方案是引入由两种类型的墙组成的混合结构系统：（1）带有或不带有边界元件的可延展壁，以抵抗横向力和垂直力的一部分;（2）只能承受轴向载荷的重力墙。本文提出了两种解决方案的组合（即在组件和系统级别）。此外，它利用一系列线性和非线性静态和动态分析来评估和量化横截面构型和延性剪力墙面积对总建筑面积（​​即延性剪力墙比）对砌体建筑地震响应的影响。数值分析由宏模型执行，该宏模型详细模拟了非线性响应。主要目标是推荐一系列可延展的剪力墙比率，以优化设计和总体性能。该研究针对地震危险程度中等的中高层砖石建筑。研究结果强调，在拟议的混合结构系统中利用具有边界元素的延性墙会在结构响应和设计优化方面带来重大的有利增强。另外，结果证明了垂直减少和终止特别细致的边界元素的可能性，从而促进了韧性混凝土砌筑剪力墙建筑成为竞争性建筑系统。 （C）2020年美国土木工程师学会。

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