PQ-Fiber是清华大学土木工程系结构工程研究所潘鹏副教授和曲哲博士基于大型通用有限元程序ABAQUS开发的一组材料单轴滞回本构模型的集合。主要用于在钢筋混凝土结构、钢结构等的弹塑性时程分析中定义杆系结构的材料本构，同时可用于任何需要定义材料单轴滞回本构模型的情况。(PQ fiber is a set of uniaxial hysteretic constitutive models developed by Pan Peng and Dr. Qu Zhe of Institute of structural engineering, Department of civil engineering, Tsinghua University Based on ABAQUS. It is mainly used to define the material constitutive model of bar structure in the elasto-plastic time history analysis of reinforced concrete structure and steel structure. It can also be used in any case where it is necessary to define the material uniaxial hysteretic constitutive model.)