摘要
采用通用有限元软件ANSYS ,计算了金沙洲大桥空心桥墩的空间应力分布 .首先将大桥空心桥墩离散为由块体单元组成的空间结构 ,然后考虑上部桥梁结构自重和活载作用 ,进行了空心墩的空间应力分析 ,得出了墩顶实体段和中间区段的空间应力分布 ,结果表明原设计空心桥墩最大应力超过了规范的限值 .文中提出加厚顶板和调整隔板位置的改进措施 ,计算表明修改后空心桥墩的最大应力和位移均有较大的改善 。
With the finite element(FE) software ANSYS, the three-dimensional stress analysis of a pier of Jinshazhou Bridge is carried out. First, a spatial FE model of the pier with box cross-section is developed. Then under the vertical dead and live loads, the stress distributions at the upper and middle section of the pier are computed, and the behavior of the pier can be evaluated. The computing results show that the maximum tension stresses of the pier exceed the limit values of the Bridge Design Specification of China. Finally, some modifications for the piers structure are proposed and the numerical results show that the maximum stresses and displacements of the piers can be reduced significantly. The result of the present study provides some reference for the design of long-span bridge piers with box cross-section.
出处
《昆明理工大学学报（理工版）》
CAS
2003年第6期113-116,共4页
Journal of Kunming University of Science and Technology(Natural Science Edition)
关键词
金沙洲大桥
有限元分析
空间应力分布
空心桥墩
广州市
pier with box cross-section, three-dimensional stress analysis, long-span PC bridge
