考虑粘结滑移的RC锚固区段修正钢筋本构关系

Modified constitutional relation of reinforcement for RC anchored zones considering bond and slip

根据静力平衡和变形协调,考虑锚固方式、粘结失效和拉脱滑移等对粘结滑移作用的影响,分别按钢筋水平锚固段和下弯段滑移值推导了钢筋混凝土结构锚固区段在粘结滑移作用下的修正钢筋本构关系,为在钢筋混凝土结构非线性有限元分析中考虑粘结滑移关系提供了简化和有效的途径.采用不同的材料模型对典型的梁柱节点试验进行非线性模拟,并与试验结果进行对比,分析表明:修正钢筋本构关系可以有效模拟锚固区段粘结作用的发展和失效过程,以及粘结滑移作用下结构的受力性能.

Based on the conditions of equilibrium of forces and compatibility of deformations, the modified constitutional relation of steel within the anchored zone was derived from slip strain of horizontal and vertical portions of anchorage lengths, taking into account of the influences of anchorage mode, bar slip and cohesion failure, which provides the simplified and effective way for considering bond and slip in nonlinear finite element analysis of reinforced concrete structure. The proposed methods were used to analyze the typical tests of reinforced concrete joints. Analytical results show that the modified constitutional relation is an effective method to simulate the development and failure process of bond-slip in anchored zones and the mechanical behavior of structures.