钢管混凝土拱桥带刚性外套钢管的吊杆索力测定与控制

Testing and Controlling of Rigid Suspender Force with Outer Steel Tube in Concrete Filled Steel Tubular (CFST)Arch Bridge

吊杆是钢管混凝土拱桥重要的受力构件,其实际索力往往与设计索力存在较大的偏差。因此,钢管混凝土拱桥在施工和营运过程中,吊杆索力的分析、测定和控制非常重要。以宿迁市洋河大桥(下承式钢管混凝土拱桥)施工过程中吊杆索力的监测为工程背景,分析了吊杆的力学行为,进行了有限元仿真分析,提出了利用振弦式应变计测量吊杆外套钢管应变(力),从而间接测量吊杆索力的新方法。

Suspender is on important member in concrete filled steel tubular （CFST）arch bridge,and there is error between its actual suspender force and the designed suspender force. Therefore, during the process of construction and operation, it is important to analyze, measure and control the suspender force of CFST arch bridge. Taking the monitoring of suspender force of Yanghe bridge in Suqian city as the engineering background,this paper analyzed suspender mechanical behavior,performed finite element analysis and presented a new method of using vibrating wire strain gauge to measure the strain/stress of the outer steel tube of the suspender, so as to measure the suspender force indirectly.