Quantitative Analysis of Site-city Interaction Effects on Regional Seismic Damage of Buildings

Tian, Yuan; Sun, Chujin; Lu, Xinzheng; Huang, Yiteng

doi:10.1080/13632469.2020.1828199

Cited by 14 publications

(8 citation statements)

References 28 publications

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“…To illustrate the applicability of the above findings, the Pα results for the Tongzhou District case modeled by Tian et al [15] were analyzed using the method described in Section 3.2. In this study, 311 buildings were analyzed with and without the SCI effect.…”

Section: Comparison With Pα Results From Tongzhou District Casementioning

confidence: 99%

“…They observed that the SCI effect generally had a positive impact on building responses, but it could cause more severe damage to low-rise unreinforced masonry structures. Tian et al [15] employed a nonlinear numerical coupling scheme to quantitatively analyze an idealized building cluster and three real-world urban building models to investigate the impact of SCI on seismic damage. They found that the SCI-induced response changes varied significantly among buildings in different areas, with the maximum change exceeding ±50%.…”

Section: Introductionmentioning

confidence: 99%

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The site-city interaction effect on structural responses and its application to fragility analysis

Tian,

Liu,

Chen

et al. 2023

Preprint

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Seismic fragility analysis is a crucial tool for assessing the seismic performance of buildings. In areas with dense clusters of tall buildings, the significant site-city interaction (SCI) effect alters wave propagation mechanisms, influencing the seismic fragility of structures. However, utilizing the incremental dynamic analysis method directly to calculate the seismic fragility of buildings considering the SCI effect encounters two main challenges. Firstly, it is unclear how many seismic scenarios need to be analyzed to fully capture the distribution of the SCI effect on building responses. Secondly, reducing the computational workload arising from the SCI effect and incremental dynamic analysis is a pressing concern. To address these challenges, this study examines the Shanghai Central Business District as a case study and employs a nonlinear numerical coupling scheme to analyze the SCI effect on building responses under different seismic wave inputs. The study investigates the minimum number of selected input motions required to achieve different accuracy levels. According to the findings, a minimum of seven pairs of seismic wave inputs are suggested for the SCI effect analysis. Moreover, the analysis demonstrates that low-rise buildings exhibit significantly larger variations in SCI-induced response changes compared to tall buildings. Therefore, a seismic fragility analysis method considering the SCI effect is proposed for low-rise buildings. This method offers a substantial reduction in computational workload while accurately capturing the SCI effect on building responses.

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Section: Comparison With Pα Results From Tongzhou District Casementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The site-city interaction effect on structural responses and its application to fragility analysis

Tian,

Liu,

Chen

et al. 2023

Preprint

Self Cite

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show abstract

“…The analytical methods or reduced-order methods [19][20][21][22][23][24] with a limited number of DOF have been well recognized and effectively applied in the evaluation of the SSSI effects on the dynamic response of buildings. In these mechanical models, a small number of lumped masses, dashpots, and springs are employed.…”

Section: Introductionmentioning

confidence: 99%

Seismic Structure‐Soil‐Structure Interaction between inelastic structures

Vicencio,

Alexander,

Málaga‐Chuquitaype

2024

Earthq Engng Struct Dyn

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Frequently, buildings in urban areas are designed by considering their stand‐alone response, that is, as single structures with no neighboring buildings. Nevertheless, the existence of a high density of buildings in large metropolitan areas inevitably results in the likelihood of an important seismic interaction between adjacent buildings through the underlying soil. This paper explores the effects of Structure‐Soil‐Structure Interaction (SSSI) on the seismic response of two yielding structures embedded in a linear elastic soil. A simple two‐dimensional nonlinear reduced‐order parametric model is proposed, where different building parameters are considered. A nonlinear phenomenological Bouc–Wen model is assumed for the buildings. A database of 15 strong ground motion records and an additional spectrally matched seismic ground motion are considered. An extensive parametric study comprising over two million nonlinear cases is conducted. The results show important differences between nonlinear SSSI and nonlinear SSI for particular parameter configurations. Nevertheless, due to energy dissipation and increases in damping in the nonlinear case, the effects of SSSI are less relevant compared with the linear case.

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“…The system obtains real-time ground motions from existing strong motion networks and uses models with different levels of detail, from relatively simple multi-degree of freedom (MDOF) models to refined finite element models of essential structures. Then, they put forward a numerical coupling scheme for nonlinear time history analysis of regional-scale buildings considering "site-city interaction(SCI) effects" [27][28][29] .…”

Section: Introductionmentioning

confidence: 99%

Earthquake disaster simulation of regional bridges based on nonlinear dynamic time history response analysis

Qian

Yang

Xia

et al. 2023

Preprint

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As the hub of the traffic network, the rapid assessment of the damaged state of bridges after earthquakes is of great significance for post-disaster rescue. The traditional vulnerability-based method can only provide the probability of different damage states of structures under different earthquake intensity indicators, which confuses the selection of post-disaster rescue routes. Therefore, based on nonlinear dynamic time history response analysis, this paper proposes a technology for earthquake disaster simulation of regional bridge groups and rapid assessment of post-earthquake damage state. First, the surface seismic response is calculated based on the regional geological borehole data obtained from the previous investigation; Second, the simplified computational mechanical model of the regional girder bridge is extracted to achieve standardized and modular data input and response analysis; Finally, the damaged state of the bridge is evaluated quantitatively based on the selected component damage index. Eighty-five bridges in a specific area are considered an example to verify the proposed method. The results show that the proposed method has high calculation efficiency and can consider the site characteristics and structural design parameters. Also, the calculation results can better reflect the actual earthquake damage distribution, providing strong technical support for post-disaster rescue.

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Quantitative Analysis of Site-city Interaction Effects on Regional Seismic Damage of Buildings

Cited by 14 publications

References 28 publications

The site-city interaction effect on structural responses and its application to fragility analysis

The site-city interaction effect on structural responses and its application to fragility analysis

Seismic Structure‐Soil‐Structure Interaction between inelastic structures

Earthquake disaster simulation of regional bridges based on nonlinear dynamic time history response analysis

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