详情

Proposed AASHTO Specifications for Design of Piles for Downdrag

项目名称：	Proposed AASHTO Specifications for Design of Piles for Downdrag
摘要：	The AASHTO Load and Resistance Factor Design (LRFD) Bridge Design Specifications recognize that piles in settling soil experience downdrag forces from negative skin friction and may also move downward with the adjacent soil. Many bridges are constructed in areas where there is compressible soil or liquefiable soil, which necessitates the consideration of downdrag forces and associated settlement. Downdrag for static and seismic conditions has increasingly placed greater demands on existing and new foundations and also led to higher construction costs. Therefore, there is an immediate need to review the fundamental behavior of piles subject to downdrag and propose design specifications for the implementation of the neutral plane method for the evaluation of downdrag and the static and seismic design of piles. The objectives of this research are to (1) propose modifications to the AASHTO LRFD Bridge Design Specifications for the static and seismic design of piles for downdrag and (2) develop design examples to demonstrate the application of the proposed design specifications.
状态：	Active
资金：	420000
资助组织：	National Cooperative Highway Research Program<==>Federal Highway Administration<==>American Association of State Highway and Transportation Officials (AASHTO)
项目负责人：	Dekelbab, Waseem
执行机构：	University of Arkansas, Fayetteville
开始时间：	20201015
预计完成日期：	20230714
主题领域：	Bridges and other structures；Design；Highways