Modeling Nonlinear-Inelastic Seismic Response of Tall Buildings with Soil–Structure Interaction

As an effective way of passive damping, isolation technology has been widely used in all types of building structures. Currently, for its theoretical analysis, it usually follows the rigid foundation assumption and ignores soil-structure interaction, which results in calculation results distortion in conducting seismic response analysis. In this paper, three-dimensional finite element method is used to establish finite element analysis model of large chassis single-tower base isolation structure which considers and do not consider soil-structure interaction. The calculation results show that: after considering soil-structure interaction, the dynamic characteristics of the isolation structure, and seismic response are subject to varying degrees of impact.

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Effect of Pile-Soil-Structure Interaction on the Cable-Stayed Bridge in Response to the Earthquake

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.539.731 ◽

2014 ◽

Vol 539 ◽

pp. 731-735 ◽

Cited By ~ 1

Author(s):

Yu Chen

Keyword(s):

Finite Element ◽

Seismic Response ◽

Soil Structure ◽

Response Spectrum ◽

Three Dimensional ◽

Soil Structure Interaction ◽

Structure Interaction ◽

Finite Element Software ◽

Cable Stayed Bridge ◽

Three Dimensional Finite Element

In this thesis, based on the design of a 140+90m span unusual single tower and single cable plane cable-stayed bridge, free vibration characteristics and seismic response are investigated; three dimensional finite element models of a single tower cable-stayed bridge with and without the pile-soil-structure interaction are established respectively by utilizing finite element software MIDAS/CIVIL, seismic response of Response spectrum and Earthquake schedule are analyzed respectively and compared. By the comparison of the data analysis, for small stiffness span cable-stayed bridge, the pile-soil-structure interaction can not be ignored with calculation and analysis of seismic response.

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Effect of Structure-Soil-Structure Interaction (SSSI) between Three Dissimilar Adjacent Bridges

10.21203/rs.3.rs-368849/v1 ◽

2021 ◽

Author(s):

Mohanad Talal Alfach ◽

Ashraf Ayoub

Keyword(s):

Seismic Response ◽

Seismic Behavior ◽

Soil Structure ◽

Soil Structure Interaction ◽

Numerical Analyses ◽

Seismic Responses ◽

Structure Interaction ◽

Internal Forces ◽

Isolated Bridge ◽

Effect Of Structure

Abstract The present study assesses the effect of Structure-Soil-Structure-Interaction (SSSI) on the seismic behavior of three dissimilar adjacent bridges by comparing their seismic responses with the seismic response of the isolated bridge including Soil-Structure-Interaction (SSI). To this end, an extensive series of numerical analyses have been carried out to elicit the effects of Structure-Soil-Structure-Interaction (SSSI) on the seismic behavior of three dissimilar bridges with different superstructure masses. The studied bridges are based on groups of piles founded in nonlinear clay. A parametric study has been performed for configurations of three dissimilar bridges with superstructure masses ratios of 200% and 300%, concentrating on the influence of the inter-bridge spacing, and the geometrical position of the bridges towards each other and towards the seismic excitation direction. The numerical analyses have been conducted using a three-dimensional finite difference modeling software FLAC 3D (Fast Lagrangian analysis of continua in 3 dimensions). The results of the numerical simulations clearly show that the seismic responses of the dissimilar grouped bridges were strongly influenced by the neighboring bridges. In particular, the results reveal a salient positive impact on the acceleration of the superstructure by a considerable drop (up to 90.63%) and by (up to 91.27%) for the internal forces induced in the piles. Comparably, the influence of bridge arrangement towards the seismic loading were prominent on both of superstructure acceleration and the internal forces in the piles. The responses were as much as 27 times lesser for the acceleration and 11 times smaller for the internal forces than the response of the isolated bridge. Contrarily, the inter-bridge spacing has a limited effect on the seismic response of the grouped bridges.

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