摘要
桥梁静载试验是分析桥梁静力特性的重要手段,为了分析上海青浦桥的静力特性及安全性能,以青浦桥主拱桥为研究对象,对桥梁结构的实际承载能力、刚度进行分析,以便了解结构的实际工作状况。试验结果表明,在相当于汽车-15级活载和恒载、变位、升降温和收缩应力共同作用下拱脚截面上缘3、L/8截面下缘和拱顶截面下缘主筋总应力小于5#钢规范规定的容许值,拱脚截面下缘、水面以上控制截面和L/4截面下缘混凝土应力小于拱肋25#混凝土容许压应力11.0 MPa;拱顶附近实腹段横向刚度偏小,维修时需适当提高其横向刚度。青浦桥目前主拱的承载能力满足设计荷载的安全承载要求。
The static loading test of a bridge is an important mean to analyze the static characteristics of the bridge.Here,taking the main arch of Qingpu bridge as a research object,the actual load capacity and stiffness of the bridge strcture are analyzed in order to understand the actual working conditions of the bridge structure.The results show that the actual load capacity of the main arch of Qingpu bridge could meet the requirements of the design.Finally,the scientific and objective evaluation is made for the bridge structure,and some suggestions are presented for maintaining and reinforcing the bridge.
出处
《水利与建筑工程学报》
2010年第3期146-149,共4页
Journal of Water Resources and Architectural Engineering
关键词
桥梁检测
检测技术
静载试验
bridge detection
detection technique
static load test
