受腐蚀钢筋混凝土墩柱受侧向冲击后裂缝开展与破坏形态研究  

Study of crack development and failure mode of corroded reinforced concrete column under lateral impact

作　　者：邱春杰 方从启[1] 杨帅[1] 张龙建 

机构地区：[1]上海交通大学船舶海洋与建筑工程学院,上海200240

出　　处：《混凝土》2015年第8期39-42,48,共5页Concrete

基　　金：国家自然科学基金项目(51178264);铁道部科技研究开发计划项目(J2011G003)

摘　　要：通过对不同腐蚀率的钢筋混凝土墩柱的侧向冲击试验,研究腐蚀率对混凝土墩柱的变形,裂缝形成和发展及破坏形态的影响。试验采用落锤式冲击加载模拟墩柱受侧向冲击。通过改变落锤冲击高度得到不同的冲击工况,观察记录墩柱的裂缝开展和破坏形态。试验结果表明:高腐蚀率的试件抗侧向冲击能力弱,延性差,随着腐蚀率的增加,试件破坏形态由纵向裂缝和斜裂缝控制的弯剪破坏向无预兆的剪切破坏转变。Study the influence of corrosion rate to the concrete columns＇deformation, crack development and damage mode under lateral impact by experiments. Using drop hammer impact test to simulate pier columns subjected to lateral impact. Observe and record the crack development and failure pattern. Test results show that the resistance to lateral impact ability and ductility of specimens with high corrosion ratio is Ix）or.With the rising of corrosion rate, the failure pattern changed from bending shear failure which is controlled by the ver- tical cracks and the bending shear cracks to the shear failure.

关 键 词：腐蚀 侧向冲击 弯剪破坏 剪切破坏 

分 类 号：TU528.01[建筑科学—建筑技术科学]