基于涵长向的涵顶受力分析-OALib.PDFVIP

27 　8 　　　　　 Vol.27　 o.8 2010 8 　　 Journal of Highway and Transportation Research and Development 　　Aug.2010 :1002-0268 (2010)08-0060-06 1,2 2 3 1 周世生 , 孙文龙, 李文华, 肖　倩 (1., 　100088;2., 　100068; 3., 　　1300021) :通过对涵洞顶面所受土体荷载的综合研究分析, 得到符合涵洞顶面的实际受力情况、 适合涵洞结构 化设计的 土压力计算理论。首先对涵洞顶面所受土体荷载进行假定, 然后对涵洞顶面荷载单元体进行简化分析, 运用数学微积 分手段进行理论推导, 以得到涵洞纵向上涵顶不同位置的土压力计算公式, 并且运用BAQUS 有限元软件对该理论进 行验证。通过对比分析传统的土柱计算理论与有限元模拟, 证明此计算理论更加符合涵洞顶面的实际受力情况, 运用 此理论对涵洞结构尺寸进行 化, 可以降低工程造价。 :涵洞工程;微积分理论;BAQUS 有限元模拟;顶面受力 :U449　　　　　:A Analysis on Earth Pressure on Top of Culvert along Lengthwise Orientation 1,2 2 3 1 ZHOU Shisheng , SU Wenlong , LI Wenhua , XIAO Qian (1.Research Institute of Highway, Ministry of Transport, Beijing　100088, China; 2.Beijing Road and Bridge Construction Group Co., Ltd., Beijing　100068, China; 3.Changchun Institute of Technology, Changchun　Jilin　130021, China) Abstract:According to the comprehensive research and analysis about the soil load on culvert top, the calculation method of earth pressurewhich reflects the actual stresson culvert top and suitable for optimal design of culvert was obtained.At first, the soil load on culvert top was assumed, and the calculation formula of earth pressure at different positionson top of culvertwas deducted by using simplified analysisof load element of culvert top and theo- ry of calculus.Then, the calculation methodwas verified by using BAQUS finite element software.Comparedwith traditional earth column calculation theory and finite element simulation, it shows that this calculation theory is