Pile–soil-structure interaction in pushover analysis of jacket offshore platforms using fiber elements

2009 ◽  
Vol 65 (1) ◽  
pp. 209-218 ◽  
Author(s):  
Behrouz Asgarian ◽  
Mohammad Lesani
Keyword(s):  
Soil Structure ◽  
Pushover Analysis ◽  
Soil Structure Interaction ◽  
Offshore Platforms ◽  
Structure Interaction

Study of Pushover Analysis on RC Framed Structure with Underground Structure Considering the Effects of Soil Structure Interaction

2020 ◽  
Vol 8 ◽  
pp. 22-29
Author(s):  
Nasala Dongol ◽  
Prachand Man Pradhan ◽  
Suman Manandhar
Keyword(s):  
Soil Structure ◽  
Response Spectrum ◽  
Underground Structure ◽  
Pushover Analysis ◽  
Standard Penetration Test ◽  
Soil Structure Interaction ◽  
Base System ◽  
Building Site ◽  
Structure Interaction ◽  
Fixed Base

This study states that the effects of soil structure interaction on the Reinforced Concrete (RC) framed structures is directly influenced by the soil properties of the site. Here, one preexisting structure is taken for the study. The building is a hospital building with two underground basements. Taking into account the actual soil condition of building site, this study provides idea on the soil structure interaction on the structure The properties of springs are calculated from different standard penetration test (SPT) values, Poisson’s ratio and elasticity of soil along the depth of the soil. Entire soil-foundation-structure system is modelled and analyzed using spring approach. Static analysis, response spectrum analysis and pushover analysis (PA) are done in order to find the variations in natural periods, base shears and deflections of the structures by incorporating soil flexibility as compared to structures with conventional fixed base. Pushover analysis is done to evaluate the performance of the structure when modelled in fixed base and spring base system.

scholarly journals Effects of Soil-Structure Interaction on the Inelastic Seismic Response of Continuous Bridges on Piled Foundation

2019 ◽  
Vol 8 (6) ◽  
pp. 1282-1290
Keyword(s):  
Seismic Response ◽  
Soil Structure ◽  
Pushover Analysis ◽  
Time History ◽  
Fundamental Period ◽  
Soil Structure Interaction ◽  
Structure Interaction ◽  
Fixed Base ◽  
Ductility Capacity ◽  
Nonlinear Time History

Effect of soil-structure interaction (SSI) on seismic response of bridges is not clearly understood, and in general practice, bridge design is carried out ignoring its effect. This is due to the general consensus that fixed base leads to a more conservative design despite the fact that many researchers indicate that ignoring soil-structure interaction may lead to underestimation of seismic response. The current paper aims to investigate the effect of SSI on the nonlinear seismic behavior of 9-span continuous bridge supported on pile foundation penetrating sandy soils. Three types of soils were investigated representing medium to stiff sandy soil. Both pushover analysis and nonlinear time history incremental dynamic analysis are carried out using Opensees to investigate the effect of SSI on the seismic response parameters (namely, fundamental period, pushover curves, foundation rigid body motions, global ductility capacity and demand, and maximum drift ratio) of the bridge and to compare it to fixed base assumption (i.e., SSI ignored). The results indicate that although SSI increases the flexibility of the structure (accordingly increasing fundamental period), the seismic demand of the bridge increases. This increase is more pronounced as the soil becomes softer.

Nonlinear Pushover Analysis of Bridge Columns Supported on Full-Moment Connection CISS Piles on Clays

2008 ◽  
Vol 24 (3) ◽  
pp. 751-774 ◽  
Author(s):  
Pedro F. Silva ◽  
Majid T. Manzari
Keyword(s):  
Soil Structure ◽  
Pushover Analysis ◽  
Bridge Columns ◽  
Soil Structure Interaction ◽  
Column Height ◽  
Steel Shell ◽  
Structure Interaction ◽  
Moment Connection ◽  
Aspect Ratios ◽  
Parametric Studies

This paper summarizes results from a static pushover analysis on the inelastic response of bridge columns supported on pile groups and consisting of full moment connection cast-in-place steel shell piles. The analytical models considered the nonlinear actions that develop in the column, the supporting piles and the soil. Parametric studies were then carried out under different sets of column height to diameter or aspect ratios and soil–structure interaction, and included variations in: (a) nonlinear soil–structure horizontal interaction and (b) nonlinear soil–structure vertical interaction. Parametric studies confirmed that variations in the horizontal and vertical soil stiffness can affect the pile cap lateral deflection and rotation, respectively. As importantly, results from this analysis indicate that for columns with aspect ratios lower than six, the contribution of soil–structure interaction is significant; however, for columns with higher aspect ratios and for stiffer soils, the effects of soil–structure interaction are almost negligible regarding the lateral response of the system. Detailed results from this study are presented and discussed in this paper.

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