建筑结构学报2017，Vol.38Issue(9)：20-27,8.DOI:10.14006/j.jzjgxb.2017.09.003
酸雨环境下钢筋混凝土框架梁抗震性能试验研究
Experimental study on seismic behaviors of reinforced concrete frame beams in simulated acid environment
摘要
Abstract
To investigate seismic behaviors of RC frame beams corroded in the environment of acid rain,3 groups of RC frame beam specimens with shear span ratios of 5.0,4.2 and 3.4 respectively were subjected to accelerated corrosion in simulated acid environment (pH =3.0).After that,quasi-static tests on the specimens were carried out to investigate the influence of both corrosion degree and shear span ratio on seismic behavious of RC frame beams with different acidulated depth,including strength,stiffness degradation,energy-dissipating capacity,etc.The results reveal that,some holes appear on the surface of RC frame beam concrete due to the combined erosion of H + and SO42-in the simulated acid solution,and get more severe with the prolongation of corrosion.When acidulated depth is less than concrete cover,both the bearing capacity and ductility of RC frame beams show an increase.With the increasing of acidulated depth,the failure patterns of test beams change from flexure failure to flexure-shear failure.Compared with non-corroded specimen,the load bearing capacity of the corroded specimen is decreased by 17.6％,the ductility is dropped by 5.24％,and the cumulative energy dissipation is dropped by 30.87％ when the mass loss of longitudinal steel is 6.5％.With the similar degree of reinforcement corrosion,the flexure-shear behavior becomes obvious with the reduction of shear span ratio,and the load bearing capacity of specimens shows an increase,but the ductility as well as the energy dissipation capacity decreases.关键词
RC框架梁/酸雨侵蚀/酸化深度/剪跨比/拟静力试验/抗震性能Key words
RC frame beam/acid rain corrosion/acidulated depth/shear span ratio/quasi-static test/seismic behavior分类
建筑与水利引用本文复制引用
郑山锁,张艺欣,黄鹰歌,关永莹,郑捷..酸雨环境下钢筋混凝土框架梁抗震性能试验研究[J].建筑结构学报,2017,38(9):20-27,8.基金项目
“十二五”国家科技支撑计划(2013BAJ08B03),国家自然科学基金项目(51678475). （2013BAJ08B03）
