基于APDL的车-连续曲线梁桥耦合系统建模及动力学分析

Modelling and Dynamic Analysis of Vehicle-Continuous Curved Girder Bridge Coupling System Based on APDL

随着公路等级、行车速度以及汽车载重等的不断提高,汽车-桥梁相互作用问题越来越突出。在车-曲线桥耦合动力系统中存在"弯-扭耦合作用",使得曲线桥的动力学分析相对复杂得多。基于APDL语言采用位移耦合法建立了车-曲线桥耦合系统有限元模型,并与已有文献对比验证了该方法的正确性。以一座5跨连续曲线箱梁公路桥为例,计算了该桥在车辆荷载作用下的动挠度响应,并分析了偏载、车速、离心力对连续曲线梁桥各跨跨中截面动挠度和动力冲击系数的影响。

With the increasing of the highway grade,driving speed and vehicle load,the vehicle-bridge interaction is becoming more and more prominent.Because of"bend-torsion coupling effect"in the vehicle-curved bridge coupling dynamic system,the dynamic analysis of curved bridge is relatively much more complex.A vehicle-curved bridge coupling system finite element model is established by the displacement coupling method based on APDL language.And the correctness of this method is verified by the existing literatures.Taking a 5-span continuous curved box girder bridge as an example,the dynamic deflection response of this bridge is calculated under the vehicle load.And the influences of partial load,vehicle speed and centrifugal force on the dynamic deflection and dynamic impact coefficients of the mid-span section of each span of continuous curved girder bridge are analyzed.