摘要
基于疲劳试验进一步分析了H型钢混凝土(SRC)梁梁连接节点的疲劳破坏模式和机理,探讨了表征这种组合节点疲劳强度的参数,对其疲劳强度进行了评估。研究表明:SRC梁梁节点疲劳破坏发生在连接到主梁的次梁截面上,次梁H型钢受拉翼缘的疲劳断裂是这种组合节点疲劳破坏的关键特征;提出了采用次梁H型钢受拉翼缘应力幅和国内外钢结构疲劳设计规范相关的S-N曲线的计算方法来进行对SRC梁梁节点的疲劳强度评估,该方法简单实用且偏于安全。
The fatigue failure mode and mechanism of beam-to-girder joints of H-shaped steel reinforced concrete （SRC） were analyzed based on fatigue experiment. Parameters affecting fatigue strength of the composite joints were discussed and the fatigue strength of the joints was evaluated. Results indicate that the fatigue failure of an SRC beam-to-girder joint occurs in the secondary beam section connected to the main girder. Fatigue fracture of the tension flange of H-shape steel in the secondary beam was the critical attribute for the fatigue failure of the composite joints. A calculation method, easy and practical, was proposed for assessing the fatigue strength of the beam-to-girder joints. This method uses the stress range of tension flange of H-shape steel in the secondary beam and the corresponding S-N curves in national or international codes and standards for fatigue design of steel structures.
出处
《工程力学》
EI
CSCD
北大核心
2016年第4期188-194,204,共8页
Engineering Mechanics
基金
国家自然科学基金项目(51078291
51478334)
关键词
H型钢混凝土梁梁节点
疲劳破坏模式与机理
钢结构疲劳设计
疲劳强度评估
计算方法建议
H-shaped steel reinforced concrete beam-to-girder joint
fatigue failure mode and mechanism
fatigue design of steel structures
fatigue strength assessment
recommendation for calculation method
