酸雨环境下RC短柱抗震性能试验研究  

Experimental Study of Seismic Behavior of RC Short Columns Under Acid Rain Environment

作　　者：郑淏[1] 郑山锁[1,2] 贺金川 张艺欣 明铭 Zheng Hao;Zheng Shansuo;He Jinchuan;Zhang Yixin;Ming Ming(School of Civil Engineering,Xi’an University of Architecture and Technology,Xi’an 710055,China;Key Lab of Structural Engineering and Earthquake Resistance,Ministry of Education(XAUAT),Xi’an 710055,China;Architectural Design and Research Institute,Xi’an University of Architecture and Technology,Xi’an 710055,China)

机构地区：[1]西安建筑科技大学土木工程学院,西安710055 [2]西安建筑科技大学结构工程与抗震教育部重点实验室,西安710055 [3]西安建筑科技大学建筑设计研究院,西安710055

出　　处：《天津大学学报（自然科学与工程技术版）》2021年第2期171-178,共8页Journal of Tianjin University：Science and Technology

基　　金：国家重点研发计划资助项目(2019YFC1509302);国家科技支撑计划资助项目(2013BAJ08B03);国家自然科学基金资助项目(51678475);西安市科技计划资助项目(2019113813CXSF016SF026);陕西省教育厅产业化项目(18JC020).

摘　　要：为探究酸雨环境下RC短柱抗震性能的劣化规律,以4榀剪跨比为2.84的RC短柱试件作为研究对象,首先对试件进行人工气候加速腐蚀试验,随后对其进行拟静力试验,观测试件破坏特征,并分析腐蚀程度变化对其抗震性能的影响规律.试验结果表明:腐蚀试件呈现出明显的表观损伤现象;各试件在往复荷载作用下均发生弯剪型破坏,而随着腐蚀程度的加重,试件的斜裂缝扩展速率增加,破坏时剪切破坏特征愈加明显;腐蚀试件的承载能力、变形能力及耗能能力均呈现出不同程度的退化,表明酸雨腐蚀对RC短柱的抗震性能影响显著.综合考虑混凝土立方体抗压强度和纵筋锈蚀率对腐蚀RC短柱峰值荷载的影响,通过多参数拟合,建立了考虑酸雨影响的RC短柱峰值荷载修正系数计算公式.To analyze the seismic behavior of reinforced concrete(RC)short columns under acid rain environment,four RC short column specimens with shear span ratio of 2.84 were used as objects.First,artificial climate environment tests were conducted on the specimens.Then,pseudo-static tests were performed.The damage characteristics of the specimens were observed,and the effect of corrosion level on the seismic behavior of the specimens was analyzed.The test results show that the corroded specimens exhibit obvious visual damage.All four specimens are dominated by flexural-shear failures under low reversed cyclic loads.With the increase of the corrosion level,the oblique cracks of the specimens expand rapidly,and the shear failure characteristics become obvious when the specimens are destroyed.Meanwhile,the load-carrying,deformation,and energy dissipation capacities continuously decrease.Hence,acid rain has a significant influence on the seismic behavior of an RC short column.On the basis of the influence of concrete cube compressive strength and longitudinal reinforcement corrosion ratio,a calculation model for the peak load correction coefficient of an RC short column that accounts for the influence of acid rain is established using multiparameter fitting.

关 键 词：RC短柱 酸雨环境 拟静力试验 抗震性能 

分 类 号：TU375.3[建筑科学—结构工程] TU352.11