（70+125+70）m跨铁路转体连续梁桥设计

摘要

Crossing above both the Nanchang-Jiujiang Intercity Railway and Beijing-Kowloon Railway, the main bridge of Gong’an Bridge is a continuous prestressed concrete girder bridge with the span arrangement of (70+125+70)meters. This thesis introduced how to select the bridge site and bridge type, how to design the bridge structure, how to select the calculation parameters, and how to erect the girder by swing method. Meanwhile, by using finite element software named Dr. Bridge, the bridge structure was calculated and analyzed longitudinally and transversely, and the results show that all the structural strengths, stresses, displacements, etc. can accord with the relevant provisions of the design codes.%共安大桥主桥上跨昌九城际、京九铁路，采用(70+125+70) m预应力混凝土连续梁，对桥位和桥型确定、桥梁结构设计和计算参数选取，以及转体施工方案进行介绍。采用有限元软件桥梁博士对桥梁结构进行纵向计算分析，结果表明结构强度、应力、位移等均满足设计规范的有关规定。