工程科学与技术2017，Vol.49Issue(5)：78-84,7.DOI:10.15961/j.jsuese.201700112
波纹钢腹板组合箱梁常幅疲劳性能试验研究
Experimental Study on Constant Amplitude Fatigue Behaviors of Box Girders with Corrugated Steel Web
摘要
Abstract
In order to investigate the failure mechanisms of box girders with corrugated steel web (BGCSW),static and fatigue tests were performed on two BGCSWs respectively.Crack initiation and propagation evolution process were detected,and the failure mode,bearing capacity,loading-deflection curve and loading-stress curve were analyzed.Besides,beam deflection under 100 kN was calculated using the formula in mechanics of materials.The experimental results indicated that:Failure started with crack initiation and propagation throughout the concrete bottom plate,then followed by the slip between webs and bottom plate,and eventually firactured in shear at concrete dowel.Therefore,FRP or prestressed bar reinforcement in bottom plate should be adopted in practical engineering to retard the crack initiation and propagation.BGCSW exhibited good fatigue resistance because of the slow propagation of fatigue cracks.The fatigue life exceeded 6× 106 cycles under the cyclic loading of half static capacity.BGSCW followed the quasi plane assumption,because the concrete plate was in the deformation of bending when the webs was sustain in shearing.The deflection calculating by the formula was slightly lower than that of experiment,which can be ascribed to that the effect of corrugated steel beam shearing deformation on the deflection was neglected.关键词
波纹钢腹板组合箱梁/破坏模式/裂纹萌生/裂纹扩展Key words
box girders with corrugated steel web/failure mode/crack initiation/crack propagation分类
建筑与水利引用本文复制引用
袁书成,董江峰,王清远..波纹钢腹板组合箱梁常幅疲劳性能试验研究[J].工程科学与技术,2017,49(5):78-84,7.基金项目
国家自然科学基金资助项目(51408382) （51408382）
四川省科技支撑项目(2015GZ0245) （2015GZ0245）
