Abstract: In the designing of the simple beam-arch composite bridge of the 100.5m span in the out Suzhou City Ring Road, Jiangsu Province, the results achieved by calculation, analysis of the structure, and test of the load on the real bridge is int roduced in this paper. We use steel pipe concrete for the arch rib, prest ressed concrete box beam for the stiffened girder, OVM anchorage and low relaxation tendon for the longitudinal prest ressed cable. In the construction of the bridge, the method of the beam first, the arch af terwards, and with little scaffords was used. The results of test have approximately coincide with the calculations and the chief section of the bridge had no crackles.

Key words: simple beam-arch composite bridge, steel pipe concrete

摘要： 介绍了江苏省苏州市跨越外港线新建的跨径100.5m预应力砼下承式简支梁拱组合式桥梁的设计与施工概况, 对重要的构造细节, 特别是端节点的设计构思, 受力特点及详细构造细节作了专门的介绍. 对计算要点及电算有关成果与实桥试验的测试成果作出了对比分析, 并阐明了截面的弯曲内力按梁拱刚度分配的特征, 论证了桥面系参予共同作用的见解, 对于设计同类桥梁具有一定的参考价值.

关键词: 简支梁拱组合桥梁, 钢管砼