Numerical investigation of the effects of soil-structure and granular material-structure interaction on the seismic response of a flat-bottom reinforced concrete silo

IF 2.6 2区 工程技术 Q2 ENGINEERING, CIVIL
Sonia Benkhellat, Mohammed Kadri, Abdelghani Seghir
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引用次数: 0

Abstract

In this work, a numerical study of the effects of soil-structure interaction (SSI) and granular material-structure interaction (GSI) on the nonlinear response and seismic capacity of flat-bottomed storage silos is conducted. A series of incremental dynamic analyses (IDA) are performed on a case of large reinforced concrete silo using 10 seismic recordings. The IDA results are given by two average IDA capacity curves, which are represented, as well as the seismic capacity of the studied structure, with and without a consideration of the SSI while accounting for the effect of GSI. These curves are used to quantify and evaluate the damage of the studied silo by utilizing two damage indices, one based on dissipated energy and the other on displacement and dissipated energy. The cumulative energy dissipation curves obtained by the average IDA capacity curves with and without SSI are presented as a function of the base shear, and these curves allow one to obtain the two critical points and the different limit states of the structure. It is observed that the SSI and GSI significantly influence the seismic response and capacity of the studied structure, particularly at higher levels of PGA. Moreover, the effect of the SSI reduces the damage index of the studied structure by 4%.

土-结构和颗粒材料-结构相互作用对平底钢筋混凝土筒仓地震响应影响的数值研究
本研究对土壤-结构相互作用(SSI)和颗粒材料-结构相互作用(GSI)对平底储仓非线性响应和抗震能力的影响进行了数值研究。利用 10 次地震记录对大型钢筋混凝土筒仓进行了一系列增量动力分析(IDA)。分析结果由两条平均动态分析承载力曲线给出,这两条曲线代表了所研究结构的抗震承载力,包括考虑和不考虑 SSI 的情况,同时考虑了 GSI 的影响。这些曲线用于量化和评估所研究筒仓的损坏情况,采用了两种损坏指数,一种是基于耗散能量的指数,另一种是基于位移和耗散能量的指数。通过有 SSI 和无 SSI 的平均 IDA 承载力曲线得到的累积能量耗散曲线是基底剪力的函数,通过这些曲线可以得到结构的两个临界点和不同的极限状态。可以看出,SSI 和 GSI 对所研究结构的地震响应和承载力有显著影响,尤其是在 PGA 水平较高的情况下。此外,SSI 的影响使所研究结构的破坏指数降低了 4%。
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来源期刊
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.
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