结构的状态-过程相关性原理  

State-Process Correlation Principle of Structures

作　　者：李乔[1] LI Qiao(School of Civil Engineering,Southwest Jiaotong University,Chengdu 610031,China)

机构地区：[1]西南交通大学土木工程学院,四川成都610031

出　　处：《桥梁建设》2020年第5期22-29,共8页Bridge Construction

摘　　要：提出能将结构状态与施工过程的各种相关性及影响因素考虑在内的一般性原理——结构的状态-过程相关性原理。该原理揭示了结构作用-响应关系及材料特性中的加载与卸载路径与结构状态-过程相关性的关系。定义了初始无应力构形与现时无应力构形,并根据该原理导出扩展无应力状态原理,将适用范围扩展到非线性弹性和几何非线性领域。定义了强/弱相关性结构以及弱相关性结构的去相关等概念,并给出扩展无应力状态原理应用于弱相关性问题的条件。结构的状态-过程相关性原理更具一般性,可为分阶段成形结构分析方法提供新的理论依据,可用于桥梁等复杂结构的设计与施工控制计算。A general principle,named state-process correlation principle of structures,is put forward in this paper.With this principle,the various correlations and their influence factors between the structural state and the construction process can be taken into account.The relationship of the loading and unloading paths involved in the material properties,the structural action-response relationship and the structural state-process correlation are revealed by this principle.The initial and the current stress-free geometrical configuration are defined.According to this principle,the extended principle of stress-free state is derived,and the scope of its application is expanded to nonlinear elasticity and geometric nonlinearity.The concepts of strong/weak correlation structures and the decorrelation of weak correlation structures have been defined,and the conditions for extending stress-free state principle to resolve weak correlation problems have been proposed.The state-process correlation principle of structures is more general,which can provide a new theoretical basis for the analysis method of phased forming structures,and can be used for the design and construction control calculation of complex structures such as bridges.

关 键 词：结构原理 非线性结构 结构状态 施工过程 相关性 材料特性 几何体系 作用体系 无应力状态 

分 类 号：U441[建筑科学—桥梁与隧道工程]