Abstract
This study aimed to investigate whether the seismic fragility and performance of interaction soil-pile-structure (ISPS) were affected by different parameters: axial load, a section of the pile, and the longitudinal steel ratio of the pile were implanted in different type of sand (loose, medium, dense). In order to better understand the ISPS phenomena, a series of nonlinear static analysis have been conducted for two different cases, namely: (i) fixed system and (ii) ISPS system, to get the curves of the capacity of every parameter for developing the fragility curve. After a comparison of the numerical results of pushover analysis and fragility curves, the results indicate that these parameters are significantly influenced on lateral capacity, ductility and seismic fragility on the ISPS. The increasing in the axial load exhibit high probabilities of exceeding the damage state. The increase in pile section and longitudinal steel ratio, the effect of probability damage (low and high) are not only related to the propriety geometrically, but also related to the values of ductility and lateral capacity of the system. Doi: 10.28991/cej-2021-03091660 Full Text: PDF
Highlights
The results after catastrophic damage of environmental and financial of serious engineering systems have turned so severe that manufactures are seriously considering improvements analysis and design to provide quantitative measures of structural performance.It is generally believed that pile foundations are advantageous for the superstructure under seismic excitations [1]
This study aims to identify structural and soil parameters that have the effects on the seismic fragility of bridges with an account the effect of interaction soil–pile-structure (ISPS) system
The increase in the axial load indicates an increase in the probability of damage in both fixed and ISPS systems for all sand types and limit states, this increase is due to the increase in resistance (Figure 6) which is decreased the period of the system
Summary
The results after catastrophic damage of environmental and financial of serious engineering systems have turned so severe that manufactures are seriously considering improvements analysis and design to provide quantitative measures of structural performance. This study aims to identify structural and soil parameters (types of the sand, pile diameter, longitudinal steel ratio, and axial force level) that have the effects on the seismic fragility of bridges with an account the effect of interaction soil–pile-structure (ISPS) system. To achieve this goal, harness used the fully nonlinear method in which main component of the interaction soil-pile-structure finite element (FE) model. The Pushover analysis is used to estimate the curve of the lateral capacity of the ISPS system and generates the IDA curves for evaluation the fragility curves
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