瓯江大桥主桥钢—混结合段设计

Design of Steel-Concrete Joints of Main Bridge of Oujiang Bridge

在借鉴已有桥梁钢—混结合段设计的基础上,针对瓯江大桥钢—预应力混凝土组合连续刚构梁式桥,采用PBL剪力板及加预应力束的设计方法,通过参考国内外规范,局部分析及对预应力锚固体的比较,提出基于传递弯矩和剪力的梁式钢—混结合段,采用PBL剪力板与预应力束组合的设计理念,并介绍PBL剪力板的作用原理及强度计算方法。

Based on the steel-concrete joints of existing bridges and in the light of the situations of the steel and prestressed concrete continuous hybrid rigid frame girder type structure of Oujiang Bridge,the joint parts of the bridge are designed by the method of PBL shearing plates plus prestressing strands.Further with reference to the domestic and foreign codes and specifications,and through local analysis and comparison of prestressed anchor solid,the design conception of PBL shearing plates plus prestressing strands is proposed for the girder type steel and concrete joints that will transmit both bending moment and shearing forces.In this paper,the function principles and strength calculation method for the PBL shearing plates are described.