唐 鹏,宫 赛sup,梁 鹏,等.不同边界条件下玻璃桥面板承载力试验研究[J].深圳大学学报理工版,2020,37(1):84-90.[doi:10.3724/SP.J.1249.2020.01084]
TANG Peng,GONG Sai,LIANG Peng,et al.Experimental study on bearing capacity of glass bridge deck under different boundary conditions[J].Journal of Shenzhen University Science and Engineering,2020,37(1):84-90.[doi:10.3724/SP.J.1249.2020.01084]
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不同边界条件下玻璃桥面板承载力试验研究
唐 鹏1,2,3,宫 赛<sup>1,2,3,梁 鹏1,3,程 高1,3,苏巨峰1,3

1)长安大学公路学院,陕西西安 710064; 2)南阳理工学院,河南南阳 473004; 3)陕西省公路桥梁与隧道重点实验室,陕西西安 710064

桥梁工程; 玻璃桥面板; 夹层玻璃; 边界条件; 轮压荷载; 承载性能

Experimental study on bearing capacity of glass bridge deck under different boundary conditions
TANG Peng1, 2, 3, GONG Sai1, 2, 3, LIANG Peng1, 3, CHENG Gao1, 3, and SU Jufeng1, 3

1)School of Highway, Chang'an University, Xi'an 710064, Shaanxi Province, P.R.China2)Nanyang Institute of Technology, Nanyang 473004, Henan Province, P.R.China3)Shaanxi Provincial Major Laboratory for Highway Bridge & Tunnel, Xi'an 710064, Shaanxi Province, P.R.China

bridge engineering; glass bridge deck; sandwich glass; boundary conditions; wheel load; bearing capacit

DOI: 10.3724/SP.J.1249.2020.01084

备注

为研究车行玻璃桥面板结构的承载力性能,以位移传感器测量玻璃板的变形量,以应变计测试玻璃板外表面应变变化,分析车轮荷载在不同边界条件和最不利荷载位置时玻璃板的破坏形态、荷载-位移曲线、安全性能及刚度要求.结果表明:单层玻璃在两边简支玻璃板的极限承载力约为四边简支玻璃板极限承载力的53.7%; 夹层玻璃在两边简支玻璃板的极限承载力约为四边简支玻璃板极限承载力的66.7%; 荷载作用在板中央时玻璃板的变形最大,作用在板角时玻璃板的应力最大; 从满足结构强度要求的角度出发,荷载作用于板角部是最不利工况; 从满足结构刚度要求的角度出发,荷载作用于板中央是最不利工况; 在板角和板中央位置两种最不利工况下施分别加0.8、1.0、1.2、1.5、1.8和2.0倍的车轮荷载,所得夹层玻璃板的最大应变值、最大变形值均满足规范规定值及试验结果可为车行玻璃桥面板用于实际工程提供参考.

In order to study the bearing capacity of the vehicle glass bridge deck structure, the displacement sensor is used to measure the deformation of the glass panel, and the strain gauge is used to measure the change rule of the strain on the outer surface of the glass panel, and the failure mode, the load-displacement curve, safety performance and stiffness requirements of the glass plate under different boundary conditions and the most unfavorable load position are analyzed. The results show that the ultimate bearing capacity of a single glass plate supported on both sides is about 53.7% of that of a simple glass plate supported on four sides, and that of laminated glass plate supported on both sides is about 66.7% of that of a simple glass plate supported on four sides. The deformation of the glass plate is the largest when the load acts on the center of the plate, and the stress of the glass plate is the largest when the load acts on the corner of the plate. From the perspective of meeting the structural strength requirements, the load acting on the corner of the plate is the most unfavorable working condition, and from the perspective of meeting the structural stiffness requirements, the load acting on the center of the plate is the most unfavorable working condition. Under the two most unfavorable conditions of plate angle and plate center position, applied 0.8, 1.0, 1.2, 1.5, 1.8 and 2.0 times of wheel load, the maximum strain and deformation of laminated glass plate can meet the requirements of the code. The test results can provide a reference for the practical engineering of vehicle glass bridge plate.

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