摘要
桥面连续构造是简支桥梁的一个重要构造措施,但很容易损坏,且易损难修,是公路简支桥梁的通病。通过梳理目前常用的桥面连续构造型式,分析了其受力机理。对目前常规的多跨径简支梁桥的梁端变形进行了分析比较,在此基础上通过对两种桥面连续构造进行有限元计算分析,得出了桥面连续在最不利情况下的应力和裂缝宽度。对比发现植入式桥面连续构造能将混凝土变形在一定范围内分散,从而大幅减小了桥面连续处的应力和计算裂缝宽度,具有较高的应用价值。
Continuous slab-deck is an important structural measure for simply-supported girder bridge,but it is easy to be damaged and difficult to be repaired which is a common problem of simple supported beam highway bridge.By sorting out the current commonly used structure types of continuous slab-deck,loading mechanisms of these structure types were analyzed.The deformations of the beam ends in current conventional multi-span simple supported beam bridges were analyzed and compared.On this basis,by finite element analysis of two types of continuous slab-deck,the stress and the crack width in the most adverse circumstance were obtained.The comparison shows that the implantable continuous slab-deck can disperse deformation of concrete in a certain range to significantly reduce the stress and calculated crack width in continuous slab-deck.This structure type has a higher value in application.
出处
《公路交通科技》
CAS
CSCD
北大核心
2010年第4期89-94,共6页
Journal of Highway and Transportation Research and Development
基金
浙江省交通运输厅科技项目(2009H09)
关键词
桥梁工程
桥面连续
应力分析
简支梁桥
植入式
裂缝宽度
bridge engineering
continuous slab-deck
stress analysis
simple supported beam bridge
implant
crack width
