车辆扰动下高架道路声屏障风荷载的数值模拟

Numerical Simulation of Running Vehicle Induced Wind Loads on Sound Barrier of Viaduct

对车辆扰动下高架道路声屏障屏体表面风荷载进行了数值模拟分析,获得了车辆经过时作用于屏体表面的典型的风压荷载时程。通过参数分析给出了屏体不同位置风压荷载的差异及原因。通过对屏体表面极值风压荷载的深入分析得出:现行采用声屏障所在地区50年一遇基本风压作为其设计控制荷载是不合理和不安全的。

Numerical simulation of running-car induced wind loads on surface of sound barriers on elevated roads is carried out.Typical time history of wind pressure loads on sound barrier surface is obtained in the process of car running nearby the sound barrier.Parametric analysis gives the difference of wind pressure loads on different position and the reason is discussed.The deep analysis of extreme wind pressure loads on sound barrier surface shows that basic wind pressure in 50 years in the existing location of sound barrier used as the control design load on sound barrier is unreasonable and unsafe.