摘要
裂缝是桥梁最常见病害之一,基于对腹拱圈分析理论的把握,从裂缝拓展理论进行分析,结合断裂力学原理,以实际工程为依托,通过有限元仿真分析腹拱圈裂缝产生的原因。结论表明:结构拉应力大于抗拉强度裂缝发生,裂纹尖端形成应力集中,并以产生应变的形式释放能量,导致裂缝持续拓展,从而危害桥梁安全。
Crack is one of the most common diseases of bridge.Based on the understanding of the analysis theory of ventral arch ring,thecauses of cracks were analyzed through finite element simulation,combining with the fracture mechanics principle and relying on practicalengineering.The results show that cracks will occur when the tensile stress is greater than the tensile strength of the structure,and at thesame time,stress concentration will occur at the crack tip,and the energy will be released in the form of strain,which will lead to the contin-uous expansion of the cracks,thus endangering the safety of the bridge.
出处
《福建建设科技》
2020年第5期62-64,共3页
Fujian Construction Science & Technology
关键词
腹拱圈
裂缝成因
断裂力学
ventral arch ring
cause of crack
fracture mechanics
