Research on Stress Intensity Factor of the Concrete Crack Based on FEM

Journal of Chongqing Jiaotong University(Natural Science) ›› 2007, Vol. 26 ›› Issue (增刊1): 1-2.

Research on Stress Intensity Factor of the Concrete Crack Based on FEM

ZHAO Wei，XIANG Yang-kai

School of Civil Engineering＆Architecture，Chongqing Jiaotong University，Chongqing 400074，China

Received:2006-04-14 Revised:2006-05-12 Online:2007-07-15 Published:2015-05-18

三点弯曲梁裂缝应力强度因子有限元分析

赵伟，向阳开

重庆交通大学土木建筑学院，重庆 400074

作者简介:赵伟(1982—)，男，山东荷泽人，硕士生，主要从事桥梁设计理论方面研究.E-mail:zhaowei@sina.com.

Abstract

Abstract: Through the FEM to research 3-D crack of a three point bent concrete beam，the viariation law of the stress intensi— ty factor K1 is got when it changes with the crack length and the load leve1．The correctness of the FEM is validated by compa ring with the existent formula．Finally，the simplified formula KI is generalized．

Key words: FEM, 3一D crack, J-integral, stress intensity factor

摘要： 利用有限元数值模拟方法对一定尺寸的砼三点弯曲梁三维裂缝进行分析，得出应力强度因子随裂缝长度和荷载水平变化时的变化规律，并通过与已有经验公式的比较，验证有限元裂缝分析方法的正确性．并归纳出K1简化计算公式．

关键词: 有限元法, 三维裂缝, ．厂积分, 应力强度因子

CLC Number:

U441 +.6

ZHAO Wei，XIANG Yang-kai. Research on Stress Intensity Factor of the Concrete Crack Based on FEM[J]. Journal of Chongqing Jiaotong University(Natural Science), 2007, 26(增刊1): 1-2.

赵伟，向阳开. 三点弯曲梁裂缝应力强度因子有限元分析[J]. 重庆交通大学学报（自然科学版）, 2007, 26(增刊1): 1-2.

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