H型Q690高强钢裂纹扩展驱动力计算分析  

Calculation and Analysis of Driving Force for Crack Propagation in H-Shaped High-Strength Steel

作　　者：高杰 张祯祥 Gao Jie;Zhang Zhenxiang(Instrumentation Technology and Economy Institute,Beijing 100055;Sinopec Petroleum Engineering Technology Research Institute Co.,Ltd.,Beijing 102206)

机构地区：[1]机械工业仪器仪表综合技术经济研究所,北京市100055 [2]中石化石油工程技术研究院有限公司,北京市102206

出　　处：《仪器仪表标准化与计量》2025年第2期13-16,共4页Instrument Standardization & Metrology

摘　　要：针对含初始裂纹的铁路桥梁典型H型钢结构,采用新开发的铁路桥梁Q690高强钢材料,考虑焊接残余应力的影响,本文通过有限元方法计算了两种裂纹形式下H型高强钢结构在单向受力和多向受力的裂纹扩展驱动力。For typical H-shaped steel structures of railway bridges with initial cracks,a newly developed Q690 highstrength steel material for railway bridges was used.Considering the influence of welding residual stress,the crack propagation driving forces of H-shaped high-strength steel structures under unidirectional and multi-directional loads were calculated using finite element method under two types of crack forms.

关 键 词：Q690高强钢 H型钢结构 裂纹扩展驱动力 多向受力 

分 类 号：U448.21[建筑科学—桥梁与隧道工程]