大跨度预应力混凝土变截面连续箱梁桥设计初探

Design of Long-span P.C Continuous Box Girder Bridge with Variable Cross-section

大跨度预应力混凝土连续梁桥具有结构刚度大、变形小、动力特性好、伸缩缝少及行车舒适等优点,在国内得以广泛推广。但随着其的大量修建,在施工及运营阶段都程度不同地出现了梁体开裂的现象,因此在设计与施工中应充分考虑控制产生裂缝的问题。

Because of advantages as big steel structure, small distortion, good dynamics, few flexed slots and comfort driving, the long-span P.C continuous box girder bridge is widely used inside. But there are cracks appearing in too many of buildings during the construction and operation, enough attention must be paid on crack control in design and constructions.