人民长江2015，Vol.46Issue(24)：38-42,47,6.DOI:10.16232/j.cnki.1001-4179.2015.24.010
混凝土结构有限元计算中预应力模拟方法及比较
Prestress simulation and comparison for finite element analysis of concrete structure
摘要
Abstract
Different simulation methods of pre-stress in FEM of reinforced structure are introduced and the relevant formulas are given, a block structure and a pre-stressed pier are taken as examples to compare the differences of these simulations. The analysis shows that the accuracy of loading method is affected by rise-span-ratio of the pre-stressed steel tendons and the er-ror is large when the rise-span-ratio is large. Steel tendons with any curvature can be simulated by nodal force method and if the mesh is reasonably arranged, the result is approximately the same as the entitative rebar method that considers the stretching process. The entitative rebar method should be adopted if post-cracking behavior of mass concrete structures must be taken into consideration;otherwise, the nodal force method should be adopted. For entitative rebar method, whether the stretching process is considered or not has great influence on the concrete compressive stress near the anchor part but little effect on other area.关键词
后张法预应力混凝土/张拉过程/实体力筋法/荷载法/节点力法/预应力分析Key words
post-tensioned pre-stressed concrete/stretching process/entitative rebar method/loading method/nodal force method/pre-stress analysis分类
建筑与水利引用本文复制引用
周沈安,汪基伟,冷飞..混凝土结构有限元计算中预应力模拟方法及比较[J].人民长江,2015,46(24):38-42,47,6.基金项目
住房和城乡建设部2014年科学技术项目计划(2014-K2-008) （2014-K2-008）
