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一、前言近年来,桥梁技术在结构分析、设计、制造和架设等各个方面都已得到改善,其进步是很快的。然而在桥梁上至今仍存在一个难以对付的问题,这就是在公路桥上所用的伸缩装置方面的问题。由于温度变化和车辆行走所引起的桥梁端部的纵向位移和转角,伸缩装置是必不可少的。但是在长期的使用中,由于伸缩装置的组成部分,如钢及混凝土等和与其连接的沥青铺装体之间有显著的刚度差别,故在伸缩缝附近
I. Introduction In recent years, bridge technology has been improved in all aspects of structural analysis, design, manufacture and erection. Its progress has been rapid. However, there is still an unmanageable problem on the bridge, which is the problem with the telescopic equipment used on the bridge. Telescopic devices are indispensable due to the longitudinal displacement and cornering of the bridge ends caused by temperature changes and vehicle travel. However, in the long-term use, since there is a significant difference in rigidity between the components of the telescopic device, such as steel and concrete, and the asphalt pavement to which it is connected, the vicinity of the expansion joint