粘贴钢板加固RC梁非线性有限元数值模拟  

NONLINEAR FINITE ELEMENT NUMERICAL SIMULATION OF RC BEAMS WITH EXTERNALLY BONDED STEEL PLATES

作　　者：杜青[1] 李晓会[2] 

机构地区：[1]河北工业大学土木工程学院,天津300132 [2]河北工业大学理学院,天津300130

出　　处：《工业建筑》2006年第z1期1018-1021,1060,共5页Industrial Construction

摘　　要：提出了外粘钢板加固受弯钢筋混凝土梁的非线性有限元模型,该模型采用了一种特殊的、具有剥离破坏功能的界面单元来模拟混凝土和外粘钢板之间的粘结层,影响这种剥离破坏的主要因素是板的厚度。由于传统的梁理论不能描述这种加固梁剥离破坏,因此,采用有限元方法能全面地、整体地描述这种加固梁的各种破坏模式。数值计算结果与各种厚度的钢板加固梁试验结果相吻合。It is presented a nonlinear finite element model for the flexure-shear response of reinforced concrete(RC) beams strengthened externally by epoxy bonded steel plates.The model includes a special interface element to simulate the thin epoxy adhesive layer and which allows for the debonding failure.This particular failure mainly depends on plate thickness.Since the conventional beam theory cannot predict the debonding failure of such beams,a finite element model capable of predicting the overall behavior of strengthened beams including different failure modes accurately is developed.The numerical results show close correlation to experimental data available for an RC beam strengthened by plates of various thickness.

关 键 词：钢筋混凝土梁 钢板 非线性有限元 界面单元 受弯性能 

分 类 号：TU375.1[建筑科学—结构工程]