New design charts for evaluating the damage potential to RC frame buildings adjacent to deep excavations

IF 1.5 4区 工程技术 Q3 COMPUTER SCIENCE, INTERDISCIPLINARY APPLICATIONS Engineering Computations Pub Date : 2024-07-02 DOI:10.1108/ec-09-2023-0609
Fatemeh Tahmoures, Ali Ghanbari
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Abstract

Purpose

Urban excavations are a cause for concern in terms of the probability of damage to nearby structures. In this study, various structural and excavation parameters were investigated to determine the probability of building damage during excavations.

Design/methodology/approach

Finite-element analysis software was used to develop a set of valid three-dimensional models. Models were developed to assess the effects of structural parameters (building height and position relative to the excavation site) and excavation parameters (depth and support system type) on the responses of the adjacent buildings.

Findings

The new design charts estimated the damage to reinforced concrete frame buildings during excavation by focusing on the angular distortion of the building, additional shear strain on the masonry walls and additional strain and stress on columns. This study showed that the probability of damage decreased as the distance between the building and the excavation increased. By contrast, it increased when the building was located at a distance equal to the excavation depth at its edge. According to this study, the axial stress caused by the excavation of building columns does not exceed 10.9% of the compressive strength of the concrete.

Originality/value

The proposed design charts can replace comparable charts and provide a deeper understanding of damage potential based on key parameters. These charts are more practical than previous charts with limited parameters.

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用于评估深基坑附近钢筋混凝土框架建筑潜在破坏的新设计图表
目的城市挖掘对附近结构造成破坏的可能性令人担忧。在这项研究中,对各种结构和挖掘参数进行了调查,以确定挖掘过程中建筑物受损的概率。研究结果新的设计图表通过关注建筑物的角度变形、砌体墙的额外剪应变以及柱子的额外应变和应力,估算了挖掘过程中钢筋混凝土框架建筑物的损坏情况。这项研究表明,随着建筑物与挖掘机之间距离的增加,损坏的概率也随之降低。与此相反,当建筑物位于与其边缘挖掘深度相等的距离时,损坏概率会增加。根据这项研究,建筑物支柱开挖造成的轴向应力不会超过混凝土抗压强度的 10.9%。这些图表比以往参数有限的图表更加实用。
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来源期刊
Engineering Computations
Engineering Computations 工程技术-工程:综合
CiteScore
3.40
自引率
6.20%
发文量
61
审稿时长
5 months
期刊介绍: The journal presents its readers with broad coverage across all branches of engineering and science of the latest development and application of new solution algorithms, innovative numerical methods and/or solution techniques directed at the utilization of computational methods in engineering analysis, engineering design and practice. For more information visit: http://www.emeraldgrouppublishing.com/ec.htm
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