摘要
近年来,高速公路事业蓬勃发展,为适应路线走向,越来越多的斜桥在公路建设中得到应用。然而大宽跨比大斜交角的空心板桥在实践中的应用依然不多,其根源在于对其力学性能和构造设计的研究较少。本文对某在役大宽跨比大斜交角空心板桥进行荷载试验和有限元计算,通过试验和计算数据的对比验证了有限元计算方法的准确性,然后通过有限元变参分析,研究不同斜交角小的大宽跨比空心板桥的横向分布系数和内力。通过计算分析,发现斜交桥的横向分布系数较正交桥更不均匀,说明斜交桥的横向刚度较正交桥差,同时,随着斜交角增大,主梁所受弯矩减小,扭矩增大,且斜交角40°以上的空心板桥受力较正交桥变化很大,需要单独设计计算。
In recent years,the highway industry has flourished,and in order to adapt to the route direction,more and more skew bridges have been applied in highway construction.However,the application of hollow slab bridges with large width-span ratios and large skew angles in practice is still limited,and the root cause lies in the lack of research on their mechanical properties and structural design.This article conducts load tests and finite element calculations on an in-service hollow slab bridge with a large width-span ratio and a large skew angle.The accuracy of the finite element calculation method is verified through the comparison of experimental and computational data.Then,through finite element variable parameter analysis,the lateral distribution coefficient and internal force of hollow slab bridges with different small skew angles and width-span ratios are studied.Through calculation and analysis,it was found that the transverse distribution coefficient of skew bridges is more uneven than that of orthogonal bridges,indicating that the transverse stiffness of skew bridges is worse than that of orthogonal bridges.At the same time,as the skew angle increases,the bending moment on the main beams decrease and the torque increase.Moreover,hollow slab bridges with a skew angle of 40°or more have a significant change in stress compared to orthogonal bridges,and require separate design and calculation.
作者
王晓平
梁晨
Wang Xiaoping;Liang Chen(Shandong Transport Vocational College,Weifang,China;Shandong Hengjian Engineering Testing Co.,Ltd.,Weifang,China)
出处
《科学技术创新》
2023年第22期112-115,共4页
Scientific and Technological Innovation
关键词
斜交桥
大斜交角
大宽跨比
横向分布系数
内力分析
skew bridge
large skew angle
large width-span ratio
transverse distribution coefficient
internal force analysis
