基于可视化荷载路径的结构混凝土拉-压杆模型

通过荷载路径可以直观地了解结构实现其功能的方式。本文首先根据荷载路径的定义，介绍一种基于平衡原理，将有限元方法和流线追踪算法结合，确定二维线弹性结构中荷载路径的方法。采用这种方法结合商用有限元软件Algor13和商用数据处理软件Tecplot9．0，把前者得到的结构应力计算结果及对应的有限元网格信息通过数据文件输入后者，以得到结构内连续的可视化荷载路径。最后，本文将这种方法用于确定牛腿结构中的可视化荷载路径，并在此基础上建立该结构的拉杆-压杆模型。

Strut-and-Tie Model of Structural Concrete Based on Load Path Visualization

The concept of load path could be employed to describe the way a structure carry the applied load. Based on the definition of the term load path, a procedure is proposed to determine load paths in two-dimensional (2-D) structure. This procedure utilizes equilibrium concept and combines with finite element method and stream tracing algorithm. To get visual continuous load path in structural concrete, commercial code ALGOR13 is firstly used to get stress field and finite element mesh and then these information is input to commercial code Tecplot9.0 via data files. Finally, load paths in a corbel is also plotted to establish a Strut-and-Tie model.