钢板组合梁桥混凝土温度效应研究

Study on the Temperature Effect of Concrete on Steel Plate Composite Girder Bridge

本研究聚焦于钢板组合梁桥的温度效应,通过调整设计参数系统研究了在整体升降温和温度梯度下的受力性能。结果表明,整体升降温对主梁剪力和扭矩影响微小,但弯矩显著,达到荷载作用下的10%。曲率半径的变化可调控组合梁桥的弯曲程度,影响弯桥在荷载下的弯扭耦合效应。在温度梯度下,主梁的内力变化相似,整体升降温对主梁弯矩的影响显著。这些研究成果为优化设计提供了参数敏感性规律。

This study focuses on the temperature effect of steel plate composite beam bridges,and systematically studies the stress performance under overall lifting and temperature gradient by adjusting design parameters.The results show that the overall temperature rise and fall have a small impact on the shear force and torque of the main beam,but the bending moment is significant,reaching 10%under load.The variation of curvature radius can regulate the degree of bending of composite beam bridges and affect the bending torsion coupling effect of curved bridges under load.Under temperature gradients,the internal force changes of the main beam are similar,and the overall temperature rise and fall have a significant impact on the bending moment of the main beam.These research results provide parameter sensitivity rules for optimizing design.