一、前言 哈尔滨松花江公路大桥是我国公路建设的特大桥梁,全长1656m,其中主桥748m(59+7×90+59m),为九跨预应力混凝土连续箱梁,横截面采用矩形双箱、行车道宽19m、两侧人行道各宽2.5m、采用分箱悬浇,连成整体的施工方案。设计荷载为汽车超-20级,验算荷载挂-120。该桥设计计算时将二个分离的单箱简化为I形梁,引用荷载横向分布系数2.4,按平面杆系进行电算。我们受大桥指挥部的委托进行结构模型 I. Introduction Harbin Songhua River Highway Bridge is a huge bridge in China’s highway construction with a total length of 1656m, of which, the main bridge is 748m (59 + 7 × 90 + 59m), which is a nine-span prestressed concrete continuous box girder with a rectangular cross-section , Traffic lane width 19m, width of 2.5m on both sides of the sidewalks, using sub-tank hanging pouring, even into the overall construction program. Design load for the car super-20, checking load hanging -120. The design of the bridge will be two separate single box simplified I-beam, the reference load horizontal distribution coefficient of 2.4, calculated by the plane rod system. We are entrusted by the headquarters of the bridge structure model