侵蚀环境与荷载耦合作用下钢筋混凝土梁斜截面承载力试验  

EXPERIMENTS OF SHEAR BEARING CAPACITY OF RC BEAM UNDER ACTION OF MULTI-AGGRESSIVE ENVIRONMENT AND LOAD COUPLING

作　　者：孙洋[1] 刁波[1] 

机构地区：[1]北京航空航天大学交通科学与工程学院土木工程系,北京100191

出　　处：《工业建筑》2010年第6期16-20,共5页Industrial Construction

基　　金：国家自然科学基金项目(50778010);国家科技支撑计划项目(2007BAF23B02-06);北京市自然科学基金项目(8092020)

摘　　要：通过室内模拟试验,研究混合侵蚀溶液、冻融循环与持续荷载耦合作用下,钢筋混凝土梁斜截面承载力和刚度退化、斜截面破坏形态等规律。试验结果表明,预加载比例对侵蚀和冻融环境下钢筋混凝土梁斜截面承载力影响明显,梁的刚度和延性退化程度与箍筋锈蚀和剪压区混凝土劣化有关。最后,给出混合侵蚀、冻融与持续荷载耦合作用下钢筋混凝土梁斜截面承载力计算方法。The simulative experiment was carried out for researching the degradation rule of shear strength,deformation,stiffness and failure mechanism of the reinforced concrete beams under the action of different persistent loading and freeze-thaw cycles and mixed aggressive solution.The conclusion indicate that persistent loading influence the shear capacity of RC beams observably,and the degradation of stiffness and ductility of RC beams arise in part from stirrup corrosion and concrete deterioration in shear-compression zone.Calculation mehtod of shear strength of RC beam under the alternative action of freeze-the cycles and mixed aggressive solution based on the experiment data was also proposed.

关 键 词：侵蚀环境 荷载 钢筋混凝土梁 抗剪承载力 试验研究 

分 类 号：TU375.1[建筑科学—结构工程]