摘要
广州新光大桥主桥为预应力混凝土刚架-钢桁拱桥,受力较为复杂,尤其是边拱肋与系杆连接区域在承受拱肋与桥墩传递的轴力和弯矩的同时,还要承受系梁的拉力。对该连接区域进行1∶3.2缩尺模型试验。通过特殊设计的试验台座,准确模拟了加载与边界条件。建立了该区域的三维有限元模型。从试验和计算两方面证明了该连接部位的设计是安全合理的。
The main bridge of the Xinguang Bridge in Guangzhou is a long-span hybrid bridge of prestressed concrete rigid-frame and steel truss arch structure. The structural behavior of the bridge, especially that of the connection area between the side steel arch rib and rigid tie member, is rather complicated. At the same time of withstanding axial forces and bending moment trans-mitting from the arch ribs and bridge piers, the connection area will also carry tensile force from the tie member. In this paper, the connection area is tested by a 1 ： 3.2 scale-down model, the loading process and boundary conditions of the area are correctly simulated through special design of the test bedstands and the three-dimensional finite element model for the area is established and applied. As a consequence, the design of the connection area proves to be safe and rational from both aspects of the test and calculation.
出处
《桥梁建设》
EI
CSCD
北大核心
2007年第1期39-42,共4页
Bridge Construction
关键词
拱桥
钢桁架
拱肋
刚性系杆
模型试验
有限元法
arch bridge
steel truss
arch rib
rigid tie member
model test
finite element method
