钢筋混凝土开裂面剪力传递性能试验研究  

Experimental research on shear transfer behavior in cracked reinforced concrete

作　　者：张申 车轶[1,2] 谢庆红 徐东坡[3] 

机构地区：[1]中海油山东化学工程有限责任公司 [2]大连理工大学海岸和近海工程国家重点实验室 [3]中国人民解放军73670部队

出　　处：《建筑结构学报》2011年第2期48-53,共6页Journal of Building Structures

基　　金：国家自然科学基金项目(50778034)

摘　　要：通过对12个Z形推开式试件的试验研究,分析了配筋率、销栓作用和开裂面尺寸对钢筋混凝土开裂面剪力传递性能的影响。在试验范围内剪切面的配筋率、高度和宽度的增加都有助于提高试件的抗剪强度,钢筋的销栓作用对未预裂试件剪切面处的抗剪强度影响不大,对于预裂试件剪切面处的剪力传递性能影响比较明显。试验中量测了预裂和未预裂试件剪切面的剪切滑移和裂缝宽度,并根据试验结果和依据已有文献试验对提出的开裂面受剪强度计算式进行了对比分析。研究表明:Mansur的单曲线和三线段式的计算精度较好。The influences of reinforcement ratio,dowel action of reinforcing bars,and dimensions of shear plane on shear transfer behavior of cracked reinforced concrete were investigated experimentally by conducting direct shear tests on 12 Z-shaped push-off specimens.The shear strength can be increased with the increase of reinforcement ratio,height and width of shear plane within the test range.Dowel action has an insignificant influence on uncracked plane,while an obvious influence on cracked plane.Both shear slip and shear crack widths of the cracked planes of specimens were recorded during the experiment,and the equations for predicting the ultimate shear stress of cracked reinforced concrete proposed by existent research were compared and verified by experimental data.It is found that Mansur＇s single curve and tri-linear formulations for determining shear transfer strength provide better predictions.

关 键 词：钢筋混凝土 剪力传递 推开试验 裂缝宽度 剪切滑移 

分 类 号：TU528.571[建筑科学—建筑技术科学] TU317.1