摘要
针对传统的空间梁-杆单元建模无法考虑异形拱局部应力的问题,以宁波甬江异形拱为研究背景,建立了梁-杆-壳混合有限元模型,并分别对恒载、恒载+活载、恒载+活载+风荷载三种工况下结构整体及局部内力进行对比,整体结构在三种工况下轴力、面内弯矩误差在1.1%以内,拱顶局部段轴力、面内弯矩误差分别为1%和2%,验证了混合有限元模型的正确性。根据混合有限元模型计算结果,截面畸变应力为70~90 MPa,在实际工程中进行整体-局部稳定分析时不可忽视。
Aiming at the problem that the traditional spatial beam-rod element modeling cannot consider the local stress of the special-shaped arch,a beam-rod-shell hybrid finite element model is established with a special-shaped arch as the research background.The overall and local internal forces of the structure under the three working conditions of dead load+live load+wind load are compared.The in-plane bending moment errors are 1%and 2%,respectively,which verifies the correctness of the hybrid finite element model.According to the calculation results of the hybrid finite element model,the section distortion stress is 70~90 MPa,which cannot be ignored in the global-local stability analysis in practical engineering.
作者
陈冠
CHEN Guan(Hunan Road and Bridge Construction Group Co.,Ltd.,Changsha,Hunan 410015,China)
出处
《黑龙江交通科技》
2022年第4期95-98,共4页
Communications Science and Technology Heilongjiang
关键词
空间梁-杆单元
异形拱
梁-杆-壳混合单元
轴力
面内弯矩
spatial beam-rod element
special-shaped arch
beam-rod-shell hybrid element
axial force
in-plane bending moment
