Parameter Study to Assess 3D Geometric Effects on Bridge Foundation Response Resulting from Liquefaction-induced Lateral Spreading Demands PDF Download
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Author: Partha Sarathi Bhattacharjee
Publisher:
ISBN:
Category : Bridges
Languages : en
Pages :
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Author: Partha Sarathi Bhattacharjee
Publisher:
ISBN:
Category : Bridges
Languages : en
Pages :
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Author: Christopher McGann
Publisher:
ISBN:
Category : Bridges
Languages : en
Pages : 263
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Book Description
The response of piled bridge foundations to liquefaction-induced lateral soil deformation is an important design consideration in seismically active regions. Recent research and case history data suggest that three-dimensional deformation of the approach embankment can significantly influence the loads placed on the embedded foundations during a flow failure or lateral spreading event. For example, the 2010 Maule earthquake in Chile caused widespread lateral spreading in the soil surrounding the Mataquito river bridge, however, only insignificant structural damage was observed in the bridge itself. The discrepancy between the amount of soil deformation and structural damage suggests that design procedures for this load case that do not make adequate consideration for 3D soil deformation mechanisms may lead to overly conservative and expensive design solutions. Finite element models of the Mataquito river bridge are created using the OpenSees computational framework to investigate the reduction in foundation loads during lateral spreading implied by the minimal structural damage at the site. These models include beam on nonlinear Winkler foundation models, dynamic effective stress models of the bridge-foundation-soil system in plane strain, and 3D models of the southern bridge abutment, approach embankment, and surrounding soil. This numerical work focuses on the development of efficient element formulations and appropriate mesh configurations to minimize computational effort, and seeks to frame the load reduction mechanisms in the context of a simplified analysis procedure for the lateral spreading load case. The results of the numerical models for the Mataquito bridge, along with a parameter study conducted using a second set of 3D finite element models, indicate that consideration for the 3D geometry of the bridge site results in tangible reductions in foundation bending demands and abutment displacements compared to those returned by a plane strain description of the problem. This reduction increases as the depth of the liquefiable layer and the effective width of the approach embankment are decreased. An approach is proposed to estimate the reductions in abutment displacement and associated foundation bending demands for a given site geometry, and an existing simplified analysis procedure is modified to better consider the findings of this work.
Author: Liangcai He
Publisher:
ISBN:
Category :
Languages : en
Pages : 886
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Author: Allison Theresa Faris
Publisher:
ISBN:
Category :
Languages : en
Pages : 912
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Author: Pedro Arduino
Publisher:
ISBN:
Category : Bridges
Languages : en
Pages : 61
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Author: Francesco Silvestri
Publisher: CRC Press
ISBN: 0429632010
Category : Technology & Engineering
Languages : en
Pages : 8083
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Book Description
Earthquake Geotechnical Engineering for Protection and Development of Environment and Constructions contains invited, keynote and theme lectures and regular papers presented at the 7th International Conference on Earthquake Geotechnical Engineering (Rome, Italy, 17-20 June 2019. The contributions deal with recent developments and advancements as well as case histories, field monitoring, experimental characterization, physical and analytical modelling, and applications related to the variety of environmental phenomena induced by earthquakes in soils and their effects on engineered systems interacting with them. The book is divided in the sections below: Invited papers Keynote papers Theme lectures Special Session on Large Scale Testing Special Session on Liquefact Projects Special Session on Lessons learned from recent earthquakes Special Session on the Central Italy earthquake Regular papers Earthquake Geotechnical Engineering for Protection and Development of Environment and Constructions provides a significant up-to-date collection of recent experiences and developments, and aims at engineers, geologists and seismologists, consultants, public and private contractors, local national and international authorities, and to all those involved in research and practice related to Earthquake Geotechnical Engineering.
Author: United States. Federal Emergency Management Agency
Publisher:
ISBN:
Category : Building laws
Languages : en
Pages : 468
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Author: Kevin Rory Mackie
Publisher:
ISBN:
Category : Concrete bridges
Languages : en
Pages : 180
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Author:
Publisher: AASHTO
ISBN: 156051521X
Category : Bridges
Languages : en
Pages : 271
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Book Description
This work offers guidance on bridge design for extreme events induced by human beings. This document provides the designer with information on the response of concrete bridge columns subjected to blast loads as well as blast-resistant design and detailing guidelines and analytical models of blast load distribution. The content of this guideline should be considered in situations where resisting blast loads is deemed warranted by the owner or designer.
Author:
Publisher: AASHTO
ISBN: 1560514566
Category : Technology & Engineering
Languages : en
Pages : 63
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Book Description
This edition is based on the work of NCHRP project 20-7, task 262 and updates the 2nd (1999) edition -- P. ix.
