山区峡谷高墩刚构桥施工期风荷载研究

STUDY ON WIND LOAD DURING CONSTRUCTION OF HIGH PIER RIGID FRAME BRIDGE IN MOUNTAINOUS CANYON

为确保高墩大跨钢构桥在山区峡谷中的施工安全,对高墩大跨度悬臂现浇桥受风荷载的影响进行研究。根据山区峡谷的地形数据建立峡谷的三维数值模型,基于计算流体力学进行峡谷风场数值模拟;并通过现场实测风速修正峡谷计算模型,并利用计算流体力学软件模拟计算峡谷风场中桥梁表面的风压值、风速值等风场特征。

In order to ensure the construction safety of long-span steel structure bridge with high piers in mountain canyons, the influence of wind load on cast-in-place cantilever bridge with high piers and large spans was studied.Based on the topographic data of mountain canyons, a three-dimensional numerical model of the canyon is established, and the numerical simulation of the canyon wind field is carried out by computational fluid dynamics(CFD). The computational model of the canyon is modified by the field measured wind speed data, furthermore,the wind pressure and wind speed on the bridge surface in the canyon wind field are simulated and calculated by CFD software.