Parameter Identification and Analysis of Shaking Table Tests on SSI System

Li, Peizhen; Zhao, Peng; Lü, Xilin

doi:10.3130/jaabe.10.421

Cited by 10 publications

(8 citation statements)

References 19 publications

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“…In ANSYS, the target and contact elements that form a contact pair are related to each other via a shared real constant set. In this simulation, the normal contact stiffness factor is 1.0, and the maximum contact friction coefficient is 0.2 …”

Section: Simulation Methodsmentioning

confidence: 99%

“…In this simulation, the normal contact stiffness factor is 1.0, and the maximum contact friction coefficient is 0.2. [30] 3.6 | Dealing with uncoordinated degrees of freedom…”

Section: Simulation Of Nonlinearity Of the Soil-structure Interfacementioning

confidence: 99%

“…The model's scale was 1/15. The tests adopted uniform silt clay as the model soil, and a flexible cylindrical container was used to reduce the undesirable boundary effects …”

Section: Introduction To Shaking Table Testmentioning

confidence: 99%

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Numerical analysis of a shaking table test on dynamic structure‐soil‐structure interaction under earthquake excitations

Liu

et al. 2017

Structural Design Tall Build

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Summary Structure‐soil‐structure interaction (SSSI) phenomena under earthquake excitations are investigated in this paper. Based on the results of the shaking table test, this work presents a 3‐dimensional finite element numerical simulation method using ANSYS software. In the simulation, an equivalent linear model is assumed for soil behavior, and contact elements are adopted to consider the nonlinearity state of the interface between foundation and surrounding soil. In addition, constrained equations are added to manage the uncoordinated degrees of freedom. By comparing the results of the finite element analysis with data obtained from the shaking table test, the dynamic response of the shaking table test can be simulated properly. Finally, the dynamic response of adjacent structures considering the SSSI effect is analyzed. The results show that with increased excitation, contact pressure, strain amplitude, and pile slip increase, whereas the peak acceleration magnification coefficient decreases. These results are significant for studying the effect of SSSI on seismic responses of structures.

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Section: Simulation Methodsmentioning

confidence: 99%

“…In this simulation, the normal contact stiffness factor is 1.0, and the maximum contact friction coefficient is 0.2. [30] 3.6 | Dealing with uncoordinated degrees of freedom…”

Section: Simulation Of Nonlinearity Of the Soil-structure Interfacementioning

confidence: 99%

See 1 more Smart Citation

Numerical analysis of a shaking table test on dynamic structure‐soil‐structure interaction under earthquake excitations

Liu

et al. 2017

Structural Design Tall Build

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“…C can be calculated according to Equation (8). Furthermore, an appropriate grid size should also be adopted [36]. Figure 5 illustrates the model meshing.…”

Section: Element Selectionmentioning

confidence: 99%

Studies on Pounding Response Considering Structure-Soil-Structure Interaction under Seismic Loads

Liu

Lü

2017

Sustainability

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Pounding phenomena considering structure-soil-structure interaction (SSSI) under seismic loads are investigated in this paper. Based on a practical engineering project, this work presents a three-dimensional finite element numerical simulation method using ANSYS software. According to Chinese design code, the models of adjacent shear wall structures on Shanghai soft soil with the rigid foundation, box foundation and pile foundation are built respectively. In the simulation, the Davidenkov model of the soil skeleton curve is assumed for soil behavior, and the contact elements with Kelvin model are adopted to simulate pounding phenomena between adjacent structures. Finally, the dynamic responses of adjacent structures considering the pounding and SSSI effects are analyzed. The results show that pounding phenomena may occur, indicating that the seismic separation requirement for adjacent buildings of Chinese design code may not be enough to avoid pounding effect. Pounding and SSSI effects worsen the adjacent buildings' conditions because their acceleration and shear responses are amplified after pounding considering SSSI. These results are significant for studying the effect of pounding and SSSI phenomena on seismic responses of structures and national sustainable development, especially in earthquake prevention and disaster reduction.

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“…At present, researchers have made a series of valuable conclusions and achievements in theory and experiment considering the soil–structure interaction (SSI) or soil–adjacent structure interaction (SASI) problems under the action of earthquake . In experimental study, the shake table test is a preferred choice for the antiseismic analysis of the SSI (SASI) problem.…”

Section: Introductionmentioning

confidence: 99%

Substructure shake table test for equipment‐adjacent structure–soil interaction based on the branch mode method

Jiang

2019

Structural Design Tall Build

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A substructure shake table test (SSTT) based on the branch mode method was performed to reveal the mechanism and rules of equipment-adjacent structure-soil interaction (EASSI) under a seismic effect. EASSI system was divided into three substructures, namely, equipment-single structure, foundation soil, and adjacent structure. The coupling terms of interaction among the substructures were proposed.The branch mode method was effectively applied to the SSTT by decomposing and transforming the dynamic equation of the entire system and utilizing the coupling terms of interaction for data exchange among substructures. The degree of freedom was reduced for the linear substructures. Experiments indicated that in EASSI, the presence of soil magnified the flexibility and equivalent damping of the entire system.The overall effect was presented as a reduction in the dynamic response of the system. The dynamic feedback of the equipment inhibited the dynamic response of the main structure, which intensified the rate of vibration attenuation of the system.The seismic response analysis was also performed for the system when the mass ratio and frequency ratio between the equipment and the main structure and the position of the equipment in the main structure varied. KEYWORDS branch mode method, equipment-adjacent structure-soil interaction (EASSI), seismic response, shake table, soil-structure interaction, substructure test 1 | INTRODUCTION Along with the rapid social and economic development, the costs of equipment add to total costs of construction. A seismic action may cause great damage to the equipment, leading to a growing concern on antiseismic properties of equipment and pipelines. These equipments and structures are considered as a system engaged in dynamic interaction. The methods for analyzing the dynamic interactions between the equipment and the structure include the theoretical and experimental approaches. The floor response spectrum is a typical theoretical approach. In the conventional floor response spectrum, forced decoupling is performed, with the response of the main structure as the seismic input of the equipment.However, the tuning effect and interactions between the equipment and the main structure, as well as nonclassical damping and space coupling, are neglected when computing the floor response spectrum. As a result, the computational result is relatively conservative and does not satisfy the economical requirements. This method was applied to determine the design peak acceleration of the equipment located in the nonelastic structure. [1] The modified floor response spectrum considers the dynamic features of equipment and main structure as well as the interactions between ---

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Parameter Identification and Analysis of Shaking Table Tests on SSI System

Cited by 10 publications

References 19 publications

Numerical analysis of a shaking table test on dynamic structure‐soil‐structure interaction under earthquake excitations

Numerical analysis of a shaking table test on dynamic structure‐soil‐structure interaction under earthquake excitations

Studies on Pounding Response Considering Structure-Soil-Structure Interaction under Seismic Loads

Substructure shake table test for equipment‐adjacent structure–soil interaction based on the branch mode method

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