详情

Recommended Design Specifications for Live Load Distribution to Buried Structures

项目名称：	Recommended Design Specifications for Live Load Distribution to Buried Structures
摘要：	The design and evaluation of buried structures requires an understanding of how vertical earth loads and vehicular live loads are transmitted through earth fills. Force effects due to vehicular live loads are determined by approximate methods. The approximate method for estimating the distribution of vehicular live loads through earth fill in the AASHTO Standard Specifications has, over many years, produced designs that have performed acceptably. The AASHTO LRFD Bridge Design Specifications use a different approximate method that significantly increases live load pressures on buried structures compared with the Standard Specifications. When combined with the increased dynamic load allowance prescribed in the LRFD Specifications, this increase is even greater. In addition, the basis of the approximate methods in both codes is not well documented or understood. Therefore, a more rational approach that takes into account the numerous factors that affect the actual live load distribution on these structures is needed. The approach should be validated by comparison with buried structure performance. The objective of this project is to develop recommended revisions to the AASHTO LRFD Bridge Design Specifications relating to the distribution of live load to buried structures. In addition, refined methods of analysis for the distribution of live load to buried structures shall be developed.
状态：	Completed
资金：	350000.00
资助组织：	Federal Highway Administration<==>American Association of State Highway and Transportation Officials (AASHTO)<==>National Cooperative Highway Research Program
项目负责人：	Dekelbab, Waseem
执行机构：	CNA Consulting Engineers
开始时间：	20050421
实际结束时间：	20090427
主题领域：	Bridges and other structures；Design；Highways；Planning and Forecasting；I30: Materials