波形钢腹板组合梁桥横向受力研究

该文结合波形钢腹板箱梁的受力特性,考虑了波形钢腹板箱梁横向受力产生的周边不变形的约束扭转和畸变翘曲,对波形钢腹板组合梁桥横向受力进行研究,提出了波形钢腹板箱梁横向受力计算模型;并针对波形钢腹板箱梁实桥进行了试验研究和有限元计算,验证了横向受力计算模型的有效性。对比我国《公路钢筋混凝土及预应力混凝土桥涵设计规范》(JTG D62-2004)中混凝土箱梁桥横向设计要求,研究表明提高横向设计弯矩系数即可实现波形钢腹板箱梁桥的横向设计安全。

RESEARCH ON TRANSVERSE INTERNAL FORCES IN BOX-GIRDER BRIDGES WITH CORRUGATED STEEL WEBS

Combining the mechanical characteristics of a box girder with corrugated steel webs, this paper studies the transverse internal forces in a box-girder bridge with corrugated steel webs, and then proposes a mechanical analytical model for calculating transverse internal forces in box-girder bridges with corrugated steel webs, in which torsion is restrained by non-deformable surroundings and distortional warping is considered. Experimental testing and finite element analysis of the real box-girder bridge with corrugated steel webs was carried out; the result proves the validity of the proposed model. A comparative study using the requirements for transverse design in the Code for Designing Highway Reinforced Concrete and Prestressed Concrete Bridges (JTG D62-2004) indicates that increasing the bending moment coefficients can insure the safety of the transverse design of box-girder bridges with corrugated steel webs.