基于ANSYS的体外预应力钢梁的抗弯性能研究

Study on Flexural Behavior of Externally Prestressed Steel Beams Based on ANSYS

摘要: 预应力钢梁作为一种新型的组合结构可以显著提升材料的经济效益和力学性能。通过体外主动植入钢绞线并施加偏心预拉力，在结构中施加与外部荷载效应相反的初始应力，同时由于钢绞线与钢梁的协同工作，进一步的提升钢梁的力学性能。为研究体外预应力钢梁的受力性能，本文基于Ansys有限元软件建立有限元模型，阐述建模方法及实现流程并进行验证，对不同预应力水平的钢梁进行参数化分析，对体外预应力钢梁的仿真模拟有一定实际参考价值。

Abstract: Prestressed steel girders, as a novel type of composite structure, can significantly enhance material economic efficiency and mechanical performance. By actively embedding external steel strands and applying an eccentric prestressing force, an initial stress counteracting the effects of external loads is induced within the structure. Concurrently, the synergistic interaction between the strands and the steel girder further improves the girder’s mechanical behavior. To investigate the mechanical performance of externally prestressed steel girders, this study establishes a finite element model based on Ansys software. The modeling methodology and implementation process are elaborated and validated. Parametric analyses are performed on girders with varying prestress levels. This work provides practical reference value for the simulation of externally prestressed steel girders.