弹性基础上梁体结构的应力分析

通过求解弹性基础上梁体结构挠度曲线微分方程 ,建立了梁体结构内力与基础系数间的关系 ,分析了混凝土徐变等特性对梁体应力的影响。结合实例 ,讨论了混凝土梁体结构在弹性基础上预制时保证结构制造质量的合理弹性基础系数。通过对极端刚性和柔性基础的讨论 ,说明了所得到的结论与初等结构分析理论的一致性。借助应力测试结果和理论解 ,指出了有限元分析时建立合理计算模型的重要性。

Stress Analysis of Beam Body Structure on Elastic Foundation

The deflection curve differential equation of beam body structure on elastic foundation is solved, relationship of variables between its internal force and coefficient of elastic foundation is formulated. Creep of concrete producing effect on stress of beam body structure is analyzed. For instance of the construction of a concrete beam on elastic foundation, enough stiffness of elastic foundation must be constructed, so that the beam body is ensured not to split during the construction. Through discussion of limit stiffness and flexible foundation, those results are accorded with primary structure analysis theories. According to stress test and solution theoretically, it is very important to construct rational model of finite element analysis.