重载交通作用下桥梁结构承载能力研究

Research on The Bearing Capacity of Bridge Structures Under Heavy Traffic

以梁格法为依托建立桥梁有限元模型,并验证其适用性。通过计算在不同重车荷载作用下桥梁结构的承载能力,对桥梁结构的荷载效应和响应特征进行分析,得出如下结论:(1)结构承载能力效应的水平随跨径的增大而不断提高,但相应特征的变化趋势不受桥梁跨径大小影响;(2)桥梁结构荷载效应呈现横向不均匀性,板(梁)响应呈现双峰特性;(3)桥梁各片板(梁)响应离散程度受重载车辆的行驶位置影响较大。

Builds a bridge finite element model based on the beam grid method and verifies its applicability. By calculating the bearing capacity of the bridge structure under different heavy vehicle loads, the load effect and response characteristics of the bridge structure are analyzed, and the following conclusions are drawn:(1) The level of the structural bearing capacity effect increases with the increase of the span., but the change trend of the corresponding characteristics is not affected by the span size of the bridge;(2) The load effect of the bridge structure presents lateral inhomogeneity, and the response of the slab(beam) presents a bimodal characteristic;(3) The response of each slab(beam) of the bridge is discrete The degree is greatly affected by the driving position of the heavy-duty vehicle.