Seismic pounding between adjacent buildingsconsidering soil-structure interaction

IF 1.4 4区工程技术 Q3 ENGINEERING, CIVIL

Earthquakes and Structures Pub Date : 2021-01-01 DOI:10.12989/EAS.2021.20.1.055

Shehata E. Abdel Raheem, Tarek M. A. Alazrak, A. Abdelshafy, Mohamed M. Ahmed, Y. Gamal

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引用次数: 5

Abstract

In urban cities, buildings were built in the neighborhood, these buildings influence each other through structure-soil-structure interaction (SSSI) and seismic pounding due to limited separation distance in-between. Generally, the effects of the interaction between soil and structure are disregarded during seismic design and analysis of superstructure. However, the system of soil-base adversely changes structural behavior and response demands. Thus, the vibration characteristics plus the seismic response of a building are not able to be independent of those in adjacent buildings. The interaction between structure, soil, and structure investigates the action of the attendance of adjacent buildings to the others by the interaction effect of the sub-soil under dynamic disturbances. The main purpose of this research is to analyze the effects of SSSI and seismic pounding on the behavior of adjacent buildings. The response of a single structure or two adjacent structures with shallow raft base lying on soft soil are studied. Three dimensions finite element models are developed to investigate the effects of pounding; gap distance; conditions of soil; stories number; a mass of adjacent building and ground excitation frequency on the seismic responses and vibration characteristics of the structures. The variation in the story displacement, story shear, and story moment responses demands are studied to evaluate the presence effect of the adjacent buildings. Numerical results acquired using conditions of soil models are compared with the condition of fixed support and adjacent building models to a single building model. The peak responses of story displacement, story moment, and story shear are studied.

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考虑土-结构相互作用的相邻建筑物间地震冲击

在城市中，建筑物多建在相邻区域，由于建筑物之间的距离有限，这些建筑物通过结构-土-结构相互作用(SSSI)和地震冲击相互影响。在上部结构抗震设计和分析中，一般忽略了土与结构相互作用的影响。然而，土基系统对结构性能和响应要求产生了不利的影响。因此，建筑物的振动特性和地震反应不可能独立于相邻建筑物的振动特性和地震反应。结构、土壤和结构之间的相互作用研究了在动力扰动下，通过底土的相互作用，相邻建筑物对其他建筑物的参与作用。本研究的主要目的是分析SSSI和地震冲击对相邻建筑行为的影响。研究了软土地基上具有浅筏基的单个结构和相邻两个结构的响应。建立了三维有限元模型来研究冲击的影响;距离的差距;土壤条件;故事数量;相邻建筑质量和地面激励频率对结构的地震反应和振动特性的影响。研究了层间位移、层间剪力和层间弯矩响应需求的变化，以评价相邻建筑的存在效应。将土模型条件下的数值结果与固定支护条件下的数值结果进行了比较，并将相邻建筑模型与单一建筑模型进行了比较。研究了层位移、层弯矩和层剪力的峰值响应。

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来源期刊

Earthquakes and Structures ENGINEERING, CIVIL-ENGINEERING, GEOLOGICAL

CiteScore

2.90

自引率

20.00%

发文量

审稿时长

>12 weeks

期刊介绍： The Earthquakes and Structures, An International Journal, focuses on the effects of earthquakes on civil engineering structures. The journal will serve as a powerful repository of technical information and will provide a highimpact publication platform for the global community of researchers in the traditional, as well as emerging, subdisciplines of the broader earthquake engineering field. Specifically, some of the major topics covered by the Journal include: .. characterization of strong ground motions, .. quantification of earthquake demand and structural capacity, .. design of earthquake resistant structures and foundations, .. experimental and computational methods, .. seismic regulations and building codes, .. seismic hazard assessment, .. seismic risk mitigation, .. site effects and soil-structure interaction, .. assessment, repair and strengthening of existing structures, including historic structures and monuments, and .. emerging technologies including passive control technologies, structural monitoring systems, and cyberinfrastructure tools for seismic data management, experimental applications, early warning and response