Exploratory study on the applicability of the capacity spectrum method on bridge pile groups
METADATA ONLY
Loading...
Author / Producer
Date
2024
Publication Type
Conference Paper
ETH Bibliography
yes
Citations
Altmetric
METADATA ONLY
Data
Rights / License
Abstract
The paper presents a feasibility study on the Capacity Spectrum Method (CSM) (widely used in structural design), applied on Soil-Structure Interaction (SSI) systems. A bridge pier founded on two distinct Reinforced Concrete (RC) pile groups, is employed as an illustrative example. Finite Element (FE) models are used to perform (monotonic and cyclic) static pushover and nonlinear time-history analyses. The CSM method predicts the seismic performance of the studied system by comparing the capacity to the demand diagram. The first corresponds to the monotonic pushover analysis, while the latter is the combined acceleration-displacement elastic spectrum of each input motion. The intersection of the two curves represents the expected performance point. Iterations, required to account for increased damping of the SSI system, are possible using the results of the cyclic pushover analyses. The predictions of the CSM method are comparatively assessed to the results of nonlinear FE time-history analysis and are shown to be in good agreement. Thus, the application of the CSM for the design of bridges on pile groups is considered promising. Allowing for parametric investigations, such an approach can contribute towards performance-based design, as an alternative to the computationally demanding time-history analyses.
Permanent link
Publication status
published
External links
Editor
Book title
Journal / series
Volume
10 (29)
Pages / Article No.
1098 - 1103
Publisher
Japanese Geotechnical Society
Event
8th International Conference on Earthquake Geotechnical Engineering (8 ICEGE)
Edition / version
Methods
Software
Geographic location
Date collected
Date created
Subject
Capacity spectrum method; Pile groups; Performance-based design; Soil-structure interaction
Organisational unit
09569 - Anastasopoulos, Ioannis / Anastasopoulos, Ioannis
03946 - Schönbächler, Maria / Schönbächler, Maria
Notes
Funding
188459 - Performance-based Design for the Retrofit of Piled Foundations of Road and Rail Bridges Subjected to Seismic Loading (SNF)