钢纤维混凝土梁抗剪强度截面分析方法  

Sectional analysis approach for shear strength of steel fiber reinforced concrete beams

作　　者：车轶[1] 武玉赞[2] 仲伟秋[1] 

机构地区：[1]大连理工大学海岸和近海工程国家重点实验室,辽宁大连116024 [2]信息产业电子第十一设计研究院有限公司大连分院,辽宁大连116600

出　　处：《大连理工大学学报》2010年第6期1003-1007,共5页Journal of Dalian University of Technology

基　　金：国家自然科学基金资助项目(50778034);"九七三"国家重点基础研究发展计划资助项目(2007CB714202)

摘　　要：在修正压力场理论和钢纤维混凝土梁受弯理论的基础上建立了钢纤维混凝土梁抗剪强度的截面分析方法,考虑了钢纤维混凝土梁裂缝处的局部应力控制条件.通过对采用3条不同钢纤维混凝土受拉应力-应变曲线的计算结果与试验结果比较,建议了考虑受拉强化效应的受拉应力-应变曲线.此外讨论了计算模型中裂缝局部控制条件对抗剪强度计算结果的影响.对44根剪跨比大于2.0的钢纤维混凝土梁进行了分析,分析结果与试验值吻合很好.Based on modified compression field theory and bending theory of steel fiber reinforced concrete（SFRC） beams,a sectional analysis approach for predicting shear strength of SFRC beams with local stress check at cracks is presented.A tensile stress-strain curve considering tensionstiffening effect is suggested based on the comparative study of the predicted shear strength obtained by three tensile stress-strain curves of SFRC with experimental results.Moreover,the effect of local stress check at cracks on the predicted shear strength is discussed.44 fiber reinforced concrete beams with shear-to-span ratios more than 2.0 subjected to shear are analyzed and a good correlation between predicted shear strength and experimental results is achieved.

关 键 词：钢纤维混凝土 抗剪强度 修正压力场理论 

分 类 号：TU377.1[建筑科学—结构工程]