【摘要】 为研究曲线钢混凝土组合梁桥各种设计参数对于其负弯矩区受力的影响,通过有限元软件建立不同参数情况下的曲线钢混凝土组合梁桥模型,并进行非线性分析,得到其横桥向的荷载-位移曲线与开裂荷载。结果表明:预应力越大,对结构挠度限制作用越大,预应力显著提高开裂荷载,最大为30%;混凝土强度的提高对于结构挠度限制较小,对于开裂荷载影响不大,最大为10%;曲率半径小于100m时,曲率半径越大,对挠度限制越大,可以显著提高开裂荷载,最大为24%,曲率半径大于100m时,对于挠度限制很小,开裂荷载最大仅提高3%。更多还原

【Abstract】 In order to Study the influence of various design parameters of curved steel concrete composite girder bridges on the force of the negative bending moment zone, the curve steel-concrete composite girder bridge model with different parameters is established by finite element software, and nonlinear analysis is carried out to obtain the load-displacement curve and cracking load of the transverse bridge. Through analysis and research, it can be known that the greater the prestress, the greater the effect on the structural deflection, the prestressing significantly increases the cracking load, the maximum is 30%; the increase of concrete strength is less restrictive to the structural deflection, for the cracking load the effect is not large, the maximum is 10%; When the radius of curvature is less than 100 m, the larger the radius of curvature, the greater the deflection limit, the significantly higher the cracking load, the maximum is 24%, and the radius of curvature is greater than 100 m, the deflection limit is very small, the maximum cracking load is only increased by 3%.更多还原