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原文传递 An Evaluation of Repair Methods FOR Cantilever Bridge Piers

题名：	An Evaluation of Repair Methods FOR Cantilever Bridge Piers
作者：	Susan E. Scott, Brad Wood, and M. E. Kroger
关键词：	Bridge repair, cantilever bridge piers, reinforced concrete bents, cantilever bents
摘要：	In an earlier phase of Project 1364, during the process of testing reduced-scale cantilever bent specimens that were models of selected bents used in the San Antonio Y Project, a flaw in reinforcement details was discovered in the joint region of several cantilever bents. The two types of bents that contained this detailing flaw included reinforced concrete bents and bents utilizing post-tensioning in the overhang. Due to inadequate anchorage of longitudinal reinforcement in the column of the post-tensioned bents and m the column and overhang of the reinforced-concrete bents, tensile forces in the column and overhang were not able to be transferred through the joint once loads imparted by the superstructure reached slightly more than service level. A number of repair schemes were developed to remediate this problem in both the reinforced and posttensioning bents. The most promising of these schemes (namely, external vertical post-tensioning external diagonal post-tensioning, and internal vertical post-tensioning) were fabricated and installed on the damaged reduced-scale cantilever bents, then were tested to factored loads / All tested repair schemes resisted the maximum test load with no indications of distress. Results of the load tests are presented, and the tested repair schemes art evaluated based on serviceability, cost, constructibility, apparent durability, and aesthetics
报告类型：	科技报告