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一、前言 曲线梁桥由于弯扭的耦合作用,受力情况比较复杂,在实用计算上很不完善,正处于研究发展阶段。一些近似法大多不计弯扭耦合作用,甚至完全忽略主梁抗扭能力。高岛-岛田的梁格法,附加了与实际不符的各主梁I_i/l_i~3=Const的假设。将G. M.法推广用于曲线梁桥的远藤笃康氏法,按曲线梁与直线梁挠度相等的条件,求出换算I*=(?)I,对参数θ、α进行修正。曲梁的挠度增大是与I无关的曲率效应,可见这种换算是经验性的,曲梁桥各主梁长度不等,引起横向挠度分布不均匀性,对这一棘手问题,
First, the preface Curved beam bridge due to the coupling effect of bending and torsion, the force situation is more complex, very imperfect in practical calculation, is in the research and development stage. Most approximate methods do not account for the coupling effect of bending and torsion, and even ignore the main beam torsion ability. Takashima-Shimada’s beaming method adds the assumption of I_i / l_i ~ 3 = Const of each main beam that does not correspond to the actual one. The G.M.M. method is extended to Endo Takeda’s method for curved beam bridges. According to the condition that the deflection between the curved beam and the linear beam is equal, the conversion I * = (?) I is obtained and the parameters θ, α are corrected. The increase of deflection of curved beam is the curvature effect which has nothing to do with I. It can be seen that this conversion is empirical. The length of each main beam of curved beam bridge is not equal and causes the inhomogeneous distribution of transverse deflection. To this thorny issue,