摘要
根据功的互等定理,推导出一种计算指定截面内力影响函数的极为简便的方法,计算结果可以利用商业通用有限元软件输出.在实际桥梁结构设计中,特别是大型复杂结构的分析计算中具有广泛的应用价值.
Based on the principle virtual work,an uniform method is deduced to calculate influence function of member structure inner forces by using business FEM program and it is very simple and easy to apply.Different from the traditional calculating method of finite element bending moment or shear force influence function, the method presented can avoid the conventional approach of bending moment or shear force influence function by using unit load passed through every bridge nodal.The actual engineering project,especially large bridge engineering structure is analyzed,for the engineers notice few influence function of the bending moment or shear force at the control part of the bridge structure or the other.Furthermore, it can output moment or shear force influence function graphics by using common business finite element software,which originally can neither calculate any bending moment or shear force influence function nor output any moment or shear force influence function graphics or text table,so it has wide practical value for larger complex structures and actual bridge structures' inner forces calculated in the preliminary design period.
出处
《兰州交通大学学报》
CAS
2004年第1期1-5,共5页
Journal of Lanzhou Jiaotong University
基金
国家自然科学基金资助项目(503780436)
