【摘要】 中山一桥为由中拱、边拱、座拱组成的变异自平衡无推力系杆拱钢桥。介绍了该桥试验模型的设计方法,以及中拱—座拱—座拱横梁和边拱—边拱横梁结点细部构造的试验加载方案,给出这两种加载工况下各测点的应变和变形试验值;建立了空间板壳有限元模型得出各测点的理论值;通过试验数据与理论数据的比较,可以看出二者比较接近,从而从试验和理论两方面证明了该桥细部构造的设计是合理和安全的。更多还原

【Abstract】 The 1st Zhongshan Bridge is a selfbalanced, thrustless variant steel tiedarch bridge composed of central arch, side arch and seat arch. In this paper, the method for design of the test model for the bridge and loading procedures of the central arch→seat arch→seat arch cross beam and side arch→side arch cross beam nodal details are presented. The strain and deformation values at all test points under two kinds of loading cases are given, the spatial shell finite element model is established in order to obtain theoretic values at the test points. By comparison of the test data with the theoretic data, the two kinds of values are found quite agreeable, and the structural details of the bridge design thus prove to be reasonable and safe.更多还原