【摘要】 曲线梁桥的弯-扭耦合效应明显,文章以一工程实例为依托,采用有限元方法建立空间模型,分析在恒载、预应力作用下主梁的扭矩和支座反力分布,研究抗扭支座的预偏心和预应力的设置方式对主梁扭矩的影响,探索有效减少主梁扭矩的方法。结果表明,抗扭支座的预偏心对支座反力及下部结构的受力影响较大,预应力筋的不对称布置方式能改善恒载作用下曲线梁桥的扭矩分布。更多还原

【Abstract】 The bending-torsion coupling effect of curved beam bridge is obvious.In this paper,based on a project case,a spatial model is established by using the finite element method.Torsion moment and bearing reaction force distribution of the primary beam under the action of dead weight and prestess are analyzed,the effects of bearing pre-eccentricity and the layout of prestressing tendon on the beam torsion moment are studied,and the effective ways to reduce the torsion moment are explored.The results show that the bearing pre-eccentricity exerts a great effect on the reaction force and the force of the lower part of structure,and the asymmetric layout of prestressing tendon can improve the torsion moment distribution caused by the dead weight.更多还原