摘要
为了给波形钢腹板组合箱梁的疲劳设计和施工提供参考,制作了试验模型梁,并对其进行疲劳荷载试验,得到了这种结构的典型疲劳破坏特征。结合有限元分析,利用已有的研究资料,比较了波形钢腹板组合箱梁与波形钢腹板钢梁应力状态的相似性。采用断裂力学分析方法,对比有限元分析和模型梁试验结果,研究了波形钢腹板组合箱梁疲劳寿命的计算模式,进而推导出这种结构的S-N曲线。研究结果表明:对于波形钢腹板组合箱梁的疲劳设计,在有限疲劳寿命设计与计算中建议偏安全地采用美国规范AASHTO 2007提供的设计参考中的C类标准。
In order to provide reference for design and construction of composite box girder with corrugated steel webs（CBCW）,test beams were made for fatigue experiment and the typical fatigue failure characteristics were obtained from the experiment.Based on test results and finite element analysis,the comprehensive comparative analysis on similarity of the stress state between steel beam and CBCW was conducted.By fracture mechanics analysis and comparison between the test and finite element analysis results,the fatigue life calculation model was studied and the S-N curves of CBCW were derived.The results show that,for design of CBCW,the category C design standard of the AASHTO 2007 specifications is recommended for finite life fatigue design calculation for safety.
出处
《中国公路学报》
EI
CAS
CSCD
北大核心
2013年第4期94-101,共8页
China Journal of Highway and Transport
基金
国家自然科学基金项目(51278183)
陕西省交通运输厅科技项目(12-21K)
关键词
桥梁工程
波形钢腹板组合箱梁
模型试验
疲劳性能
S-N曲线
bridge engineering
composite box girder with corrugated steel web
model test
fatigue performance
S-N curve
