详情

原文传递 FIELD STUDY OF LONGITUDINAL MOVEMENTS IN COMPOSITE BRIDGES.

题名：	FIELD STUDY OF LONGITUDINAL MOVEMENTS IN COMPOSITE BRIDGES.
作者：	Pentas-HA; Avent-RR; Gopu-VKA; Rebello-KJ
关键词：	COMPOSITE-BRIDGES; LONGITUDINAL-MOVEMENT; FIELD-STUDIES; INSTRUMENTATION-; MONITORING-; EXPANSION-JOINTS; NEOPRENE-; BRIDGE-BEARING-PADS; THERMAL-EFFECTS
摘要：	Bridge deck expansion joints often develop serious problems requiring extensive and expensive maintenance. This has become a nuisance to users and to bridge engineers, and many states have been involved in investigations aiming to alleviate this problem. Results reported by various states about the behavior of specific joint sealing systems have been contradictory, indicating that the problems may not be inherent to the particular system. Rather, the problems may stem from a failure to properly assess actual joint movements, inadequate design criteria, improper installation procedures, or other factors such as differences in environmental conditions. In recognition of these problems, a comprehensive experimental investigation was conducted to obtain thermally induced movements of a newly constructed bridge in central Louisiana. The instrumentation, field monitoring, and analysis of long-term longitudinal movements are described. The primary causes of movements obtained were thermal changes. The bridge experienced unsymmetrical and irreversible movements, and these were attributed to restraints associated with the neoprene-bearing pads at the expansion joints. The bent movements and the effects of traffic were small compared with the thermal movements.
总页数：	Transportation Research Record. 1995. (1476) pp117-128 (9 Fig., 2 Tab., 16 Ref.)
报告类型：	科技报告