详情

Load and Resistance Factors for Earth Pressures on Bridge Substructures and Retaining Walls

项目名称：	Load and Resistance Factors for Earth Pressures on Bridge Substructures and Retaining Walls
摘要：	The objective of NCHRP Project 12-55, now completed, was to develop recommended load and resistance factors for foundations and retaining walls for possible inclusion in the AASHTO LRFD Bridge Design Specifications using reliability theory. Lateral, vertical, and surcharge earth loads were investigated. Data for use in developing the statistical parameters needed to conduct these analyses were gathered under NCHRP 12-55, and reliability analyses were conducted to estimate load and resistance factors for various strength limit states that incorporate vertical or lateral earth loads. Nevertheless, the statistical parameters used in the calibration process were not documented consistent with recently developed standards (e.g., TRB Circular E-C079). Also, it is not clear that the existing data are adequate to achieve valid calibration of earth load and resistance factors. The objective of the research is to evaluate the data gathered under NCHRP 12-55 and other sources identified herein and assess the adequacy of that data to develop recommended load and resistance factors for foundations and retaining walls for the AASHTO LRFD Bridge Design Specifications.
状态：	Completed
资金：	97700.00
资助组织：	American Association of State Highway and Transportation Officials (AASHTO)<==>Transportation Research Board<==>National Cooperative Highway Research Program
项目负责人：	Beal, David B
执行机构：	Prototype Engineering, Incorporated
开始时间：	20060710
实际结束时间：	20070709
主题领域：	Bridges and other structures；Data and Information Technology；Research；I30: Materials