详情

原文传递 STRUCTURAL PATCH REPAIR OF CONCRETE STRUCTURES: TOWARD THE DEVELOPMENT OF A RISK-BASED IMPLEMENTATION PROCEDURE.

题名：	STRUCTURAL PATCH REPAIR OF CONCRETE STRUCTURES: TOWARD THE DEVELOPMENT OF A RISK-BASED IMPLEMENTATION PROCEDURE.
作者：	Canisius-TDG
关键词：	Decision-making; Environmental-conditions; Patching-; Patching-mortar; Reinforced-concrete-bridges; Repairing-; Risk-analysis; Stresses-
摘要：	A repaired bridge has to fulfill strength and durability criteria to achieve a specified safe and useful design life with expected levels of maintenance. During structural patch repair, the structural behavior of a concrete member can change during the excavation of old concrete and in subsequent replacement with new material, and this behavioral change needs to be considered before carrying out the repair. Currently, little guidance is available on the redistribution of stresses within a reinforced concrete structure during and after such repair. Also, there are different views among engineers on whether a structure should be propped or left unpropped during patch repair. However, structural properties and loading conditions are not the only factors important for achieving a successful repair operation. It is not only the stresses present during and after repair that affect the short- and long-term behavior of a repaired structure but also other aspects, such as environmental conditions and compatibility of repair material with original concrete. As the effects of these many facets of patch repair on the behavior of a structure are different, it is difficult to make decisions by comparing them directly. Thus, a risk-based methodology is suggested to help in decision making related to the implementation of patch repair. Discussed are the importance of a risk-based approach to structural patch repair implementation and the parameters to be considered in developing such a methodology.
总页数：	Conference Title: 9th International Bridge Management Conference. Location: Orlando, Florida. Sponsored by: Transportation Research Board
报告类型：	科技报告