车轮荷载下玻璃桥面板弯曲问题的理论解

Theoretical Solution to Bending Problem of Glass Bridge Deck under Wheel Load

近年来,玻璃以其自重轻、强度高、透光性强和节能环保的特点,被广泛应用于景区桥梁桥面板结构中。为研究在车轮荷载作用下玻璃桥面板的受力特性,基于薄板小挠度弯曲理论,应用重三角级数法推导出了车轮荷载作用下玻璃桥面板弯曲变形及内力的理论解;设计了四边简支钢化玻璃板试件,对试件进行中心受压试验,并采用ABAQUS有限元软件进行数值模拟,对比分析模型的最大挠度、应变及内力等。研究结果表明,基于薄板小挠度弯曲理论给出的玻璃板挠度、应变、应力、剪力和弯矩的解析表达式的计算结果可靠,可为车行玻璃桥面板设计计算提供理论基础。

In recent years,glass has been widely used in the bridge deck structure of scenic places due to its characteristics of light weight,high strength,strong light transmittance and energy saving and environmental friendliness.In order to study the mechanical characteristics of glass bridge deck under wheel load,based on the small deflection bending theory of thin plate,the theoretical solution of bending deformation and internal force of glass bridge deck under wheel load is derived by using the heavy triangular series method.The four-side simply supported toughened glass plate specimens are designed,and the central compression test is carried out.The ABAQUS finite element software is used for numerical simulation,and the maximum deflection,strain and internal force of the analysis model are compared.The results show that based on the small deflection bending theory of thin plate,the calculation results of the analytical expressions of deflection,strain,stress,shear force and bending moment of glass plate are reliable,which can provide a theoretical basis for the design and calculation of vehicle glass bridge deck.