大型复杂钢结构施工力学问题及分析方法

CONSTRUCTION MECHANICAL PROBLEMS AND COMPUTATIONAL METHODS OF COMPLEX STEEL STRUCTURES

结构施工过程的力学分析属于施工力学的范畴,是力学理论与土木工程实践相结合而交汇发展起来的新型交叉学科,主要特征在于研究对象的几何参数、物理参数、边界参数,是时间的函数,是耦合时间与空间的四维力学问题。施工过程"路径"和"时间"效应直接影响施工阶段及使用阶段结构的受力性能。现代大型项目的建设要求设计人员须对结构的施工过程进行分析,同时施工人员须预测和控制施工过程中结构内力和变形的发展和变化,以保证施工过程中结构的安全性以及竣工状态结构的内力和位形满足设计要求。通过对大型复杂钢结构施工过程中表现出的诸多亟待解决的施工力学问题及其求解思路与分析方法的探讨,为施工力学学科的研究与发展奠定一定的基础。

The construction mechanic combines structure mechanic and construction technology together, Its main feature is that the geometry profiles, the physical properties and the boundary conditions of a research object will change with construction duration, It is evident that the different construction processes and procedures will lead to different deformation and internal force distribution locked within a structure after the construction is ended. Therefore a structural design state must be estimated accurately if a construction-finished structure meets the design and service requirements. It will be focused on the construction mechanic problems which are explored from many large and complex steel structure construction and erection processes currently. The ten key construction mechanic problems have been pointed out, and they are analyzed and discussed comprehensively. The discussion on these problems has of great; importance to further developing construction mechanics and engineering application.