Effect of soil structure interaction on the dynamic response of reinforced concrete structures

Wani, Faisal Mehraj; Vemuri, Jayaprakash; Chenna, Rajaram; R, Dushyanth V. Babu

doi:10.1016/j.nhres.2022.11.002

Cited by 15 publications

(8 citation statements)

References 13 publications

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“…Winkler's approach, while straightforward, is inaccurate because it does not accurately record deflections, particularly for the sub-structure. Therefore, a contrast of the findings for the super as well as the sub-structure is essential to comprehend the impact of different modelling approaches [16].…”

Section: Dynamic Response Of the Structure Subjected To Ssimentioning

confidence: 99%

The Effect of Soil-Structure Interaction (SSI) on Structural Stability and Sustainability of RC Structures

Krishnan,

Sivakumar

2024

Civil and Environmental Engineering Reports

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The issue of SSI involves how the ground or soil reacts to a building built on top of it. Both the character of the structure and the nature of the soil have an impact on the stresses that exist between them, which in turn affects how the structure and soil beneath it move. The issue is crucial, particularly in earthquake regions. The interaction between soil and structure is an extremely intriguing factor in increasing or reducing structural damage or movement. Structures sitting on deformable soil as opposed to strong soil will experience an increase in static settlement and a decrease in seismic harm. The engineer must take into account that the soil liquefaction problem occurs for soft ground in seismic areas. A reinforced concrete wall-frame dual framework's dynamic reaction to SSI has not been sufficiently studied and is infrequently taken into consideration in engineering practice. The structures’ seismic performance when SSI effects are taken into account is still unknown, and there are still some misconceptions about the SSI idea, especially regarding RC wall-frame dual systems. The simulation study of the soil beneath the foundations significantly impacts the framework's frequency response and dynamic properties. Therefore, the overall significance of SSI in the structural aspect and sustainability aspects will be reviewed in this research.

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Section: Dynamic Response Of the Structure Subjected To Ssimentioning

confidence: 99%

The Effect of Soil-Structure Interaction (SSI) on Structural Stability and Sustainability of RC Structures

Krishnan,

Sivakumar

2024

Civil and Environmental Engineering Reports

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“…The bending stiffness reduction factor of corroded spun pile used in FA-1 has a much smaller value than those used in FB-FEA and FA-2 for corrosion degrees greater than 2%. This is because FA-1 refers to Equations ( 20)- (22), which use rust thickness as the main factor in determining the bending stiffness reduction factor [5]. Equations ( 20)-( 22) are considered to have relatively conservative results compared to the proposed Equations ( 23)- (28).…”

Section: Bending Stiffness Reduction Factor Of Corroded Spun Pilementioning

confidence: 99%

“…The nonlinear Winkler spring model approximates the soil reaction as a series of nonlinear springs and is commonly used in nonlinear structural analysis to model the pile-soil interaction [21]. Numerous studies have discussed the pile-soil interaction modeling method and its application for the dynamic analysis of structures [22][23][24][25][26].…”

Section: Introductionmentioning

confidence: 99%

Simplified Method for Nonlinear Seismic Response Analysis of Corroded Pile-Supported Wharf

Refani,

Nagao

2023

Applied Sciences

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Fiber-based finite element analysis (FB-FEA) has been widely recognized for its ability to reproduce experimental results and is also a reliable method for evaluating the nonlinear seismic response of pile-supported wharves (PSWs). Design practice often employs frame analysis (FA) due to its easy implementation. To precisely reproduce the nonlinear seismic response of PSW using FA, it is necessary to configure mechanical properties such as the hinge property correctly. However, it is unclear whether the hinge properties proposed in previous studies can be applied to PSWs with spun piles. In this study, a novel FA method was developed to investigate the nonlinear seismic response of PSWs with corroded spun piles considering PC bar area reduction, deteriorated material properties, the bending stiffness reduction factor, and the moment–curvature relationship of the spun pile. The nonlinear seismic response of corroded PSWs was determined by performing pushover analysis using three methods: FA using the method of the previous study (FA-1), the proposed FA method (FA-2), and FB-FEA. As regards PSW foundations, vertical pile and batter pile configurations were considered. The pushover analysis results were compared in terms of several parameters, such as the natural period, plastic hinge formation, and load capacity of the corroded PSWs. The FA-2 results agreed very well with the FB-FEA results, while the FA-1 results were less precise with respect to the natural periods and load capacities of corroded PSWs. The results indicated that the bending stiffness reduction factor, moment–curvature relationship, and axial load–bending moment (P–M) capacity of the corroded spun piles should be appropriately defined. Corrosion had greater negative impacts on the compressive axial load and bending moment capacities of the spun pile than on its tensile axial load capacity.

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“…Past earthquakes, such as the 1985 Mexico City, 1994 Northridge, and 1995 Kobe earthquakes, have provided sufficient evidence to prove that the SSI effects should be investigated [8][9][10][11]. Additionally, SSI can influence the natural frequency [12], increase the total displacement [13][14][15], and amplify the floor drifts of the superstructure [16,17]. Consequently, neglecting the kinematic effects from SSI may lead to underestimating the maximum bending moment of the piles [18].…”

Section: Introductionmentioning

confidence: 99%

Numerical Analysis on Effects of Soil Improvement on Pile Forces on Existing High-Rise Building

2023

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Nowadays, seismic codes are regularly updated with new knowledge and a better understanding of the earthquake phenomenon. With these updates, existing buildings require a reevaluation of their stability and a process of reinforcement and/or retrofitting. This study investigated the effects of two types of ground improvement which use cement-mixing soil surrounding the foundation structure to reduce and redistribute forces acting on piles. This is especially important when the reevaluation of high-rise buildings leads to increased forces in the piles. Typically, buildings are designed while assuming fixed base boundary conditions at the foundation level, without considering soil–pile–structure interaction (SPSI). SPSI significantly influences the response of high-rise buildings supported by soft soil. Increasing the lateral resistance of the surrounding soil can reduce the influence of SPSI. In this study, a detailed dynamic numerical analysis was used to investigate the dynamic response of an SPSI system of a high-rise building under seismic load. A dynamic analysis was conducted on a modified layout of a real building, using real-time earthquake motion. The finite element program DIANA FEA was used to perform nonlinear 3D FEM numerical simulations, taking into account the essential SPSI phenomena, gap-slip between the piles and the soil, and free-field boundary conditions. A comparison of the data suggests that the bending moment and shear forces in the piles are reduced in magnitude and evenly distributed along the upper part of the pile, which reduces the stress concentration of the bending moment and shear forces at the contact between the piles and the pile cap.

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Effect of soil structure interaction on the dynamic response of reinforced concrete structures

Cited by 15 publications

References 13 publications

The Effect of Soil-Structure Interaction (SSI) on Structural Stability and Sustainability of RC Structures

The Effect of Soil-Structure Interaction (SSI) on Structural Stability and Sustainability of RC Structures

Simplified Method for Nonlinear Seismic Response Analysis of Corroded Pile-Supported Wharf

Numerical Analysis on Effects of Soil Improvement on Pile Forces on Existing High-Rise Building

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