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针对钢筋砼箱形截面桁梁桥的侧倾稳定性分析 ,提出一种基于薄壁杆件理论的新型超级单元 .通过采用结构矩阵分析中的逆步变换原理和静态凝聚方法 ,得到了超级单元刚度矩阵 ,并利用文中提供的算法编制了FORTRAN语言计算程序LSAP .由于超级单元具有较少的自由度 ,所以本文算法降低了对计算机内存和计算机时的需求 ,利用微机即可有效地分析工程问题 .文中对一桁梁桥设计方案进行了实际计算 ,并与桁梁桥挠曲扭转理论计算结果进行了对比
According to the analysis of roll stability of reinforced concrete box girder bridge, a new type of super-unit based on the theory of thin-walled bars is proposed. By using the principle of inverse step transformation and static condensation in structural matrix analysis, Stiffness matrix, and use the algorithm provided in the article FORTRAN language calculation program LSAP. Since the super-unit has less freedom, so this algorithm reduces the computer memory and computer requirements, the use of computer can effectively analyze engineering problems In this paper, the design of a truss bridge is calculated and compared with the theoretical calculation results of the torsional torsion of the truss bridge