论文部分内容阅读
以高墩大跨弯连续刚构桥(主跨大于100米,墩高不小于60米)为研究对象,拟定6项主要设计参数主梁平曲线半径、双肢墩墩高、双肢墩截面形式、双肢墩间距、系梁道数、系梁刚度,设计了L24(41×31×24)六因素多水平的正交试验。利用通用ANSYS结构分析程序,基于线弹性理论对24个刚构桥数值模型进行自振模态动力分析,用直观分析法分析各设计参数及参数水平的变化对刚构桥数值模型自振模态的敏感性。双肢墩墩高和双肢墩间距对于高墩大跨弯连续刚构桥自振模态的影响最敏感,可为同类桥梁参数优化设计提供支持。
Taking the high pier and long-span continuous rigid frame bridge (main span greater than 100 meters and pier height not less than 60 meters) as the research object, six main design parameters are proposed, such as main beam horizontal curve radius, double-pier pier height, , The distance between the two limbs, the number of tie beams and the rigidity of tie beam, an orthogonal experiment of six factors and L24 (41 × 31 × 24) was designed. Based on the linear elastic theory, the dynamic model of 24 rigid-framed bridges was modeled by the general ANSYS structural analysis program. The changes of the design parameters and parameters were analyzed by the visual analysis method. Sensitivity. The height of double pier and the distance between double pier are most sensitive to the natural vibration modes of high rigid long span continuous rigid frame bridge, which can provide the support for the optimization design of similar bridge parameters.