模拟波浪作用下锈蚀钢筋混凝土墩柱的疲劳试验研究  

Fatigue Experimental Research of Corroded Reinforcement Concrete Pier Column under Simulated Wave Loading

作　　者：陈妤[1] 蒋俊南 李向楠 张娜娜 CHEN Yu;JIANG Jun-nan;LI Xiang-nan;ZHANG Na-na(Faculty of Civil Engineering and Mechanics,Jiangsu University,Zhenjiang 212013,China)

机构地区：[1]江苏大学土木工程与力学学院

出　　处：《硅酸盐通报》2019年第6期1923-1928,共6页Bulletin of the Chinese Ceramic Society

基　　金：国家自然科学基金(51508234)

摘　　要：基于莫里森方程,将波长、波高、建筑前水深、基床上水深满足一定条件下的波浪荷载简化成正弦式疲劳荷载。通过墩柱构件的通电锈蚀和疲劳加载试验,研究锈蚀率和疲劳加载频率对裂缝宽度和残余应变的影响。结果表明:目标锈蚀率为0,5%时,疲劳加载频率对裂缝宽度和残余应变的增幅均不超10%;目标锈蚀率为10%时,疲劳加载频率与两者几乎无关;锈蚀率对两者的影响较为显著,降低钢筋的锈蚀率有助于提高钢筋混凝土墩柱的耐久性。Based on morison equation, wave loading was simulated as sinusoidal fatigue loading satisfying certain conditions including wavelength, wave height, water depth in front of the building and water depth over the foundation bed. The electric corrosion and fatigue loading experiments on pier columns were carried out to analyze the effects of corrosion rate and fatigue loading frequency on crack width and residual strain. The results show that the increase of crack width and residual strain induced by fatigue loading frequency is less than 10%, when target corrosion rate is 0 and 5%. The fatigue frequency is almost nothing to do with above both values, when target corrosion rate is 10%, but the corrosion rate has significant impacts on both ones. In a word, the reduction of the rebar corrosion rate contributes to the durability of the reinforcement concrete pier column.

关 键 词：钢筋混凝土柱 波浪作用 疲劳 锈蚀 裂缝宽度 残余应变 

分 类 号：TU528.1[建筑科学—建筑技术科学]