防灾减灾工程学报2018，Vol.38Issue(1)：39-46,80,9.DOI:10.13409/j.cnki.jdpme.2018.01.006
酸溶液、冻融循环及其耦合作用下玄武岩纤维筋耐久性试验
Experimental Study on the Durability of BFRP Bars under the Acidic Solution,the Cycle of Freezing and Thawing and the Coupled Actions
摘要
Abstract
The effects of environment types and acting time on the elastic modulus and tensile strength of basalt fiber reinforced polymer (BFRP) were analyzed by performing durability experimental tests under the condition of acid solution,freeze-thaw cycles and coupled effects.The test variables include BFRP diameter (6 mm,8 mm,10 mm),corrosion age (15 d,30 d,45 d),freeze-thaw cycles (50-300 times),etc.The results show that under the action of acid solution,freeze-thaw cycles and coupled actions,the tensile strength is decreased by up to 33.9％,10.5％,31.1％,respectively,for BFRP bars with diameter of 6 mm,by up to 29.2％,6.9％,28.6％,respectively,for those with diameter of 8 mm,and by up to 10.2％,14％,10.2％,respectively,for those with diameter of 10 mm.The damages of BFRP bars with diameter of 6 mm or 8 mm and the epoxy resin matrix interface were greater under coupled effects than those under single effect,but the influence is not obvious for bars with diameter of 10 mm.The elastic modulus of BFRP bars with three different diameters is 46.2 ± 1 GPa under the natural environment,while it became 46.5 ± 1.5 GPa under the condition of acid solution,freeze-thaw cycles and coupled effects.Under the influence of above environmental factors,the variation of elastic modulus of BFRP bars with three different diameters reinforced is 0.44％-1.67％.BFRP bars with three different diameters have a certain precision with respect to the Lemaitre strain equivalence principle under freeze-thaw cycles.关键词
BFRP筋/冻融循环/抗拉强度/应变等价Key words
BFRP bar/freeze-thaw cycle/tensile strength/strain equivalence分类
建筑与水利引用本文复制引用
王海良,吴振..酸溶液、冻融循环及其耦合作用下玄武岩纤维筋耐久性试验[J].防灾减灾工程学报,2018,38(1):39-46,80,9.基金项目
天津市自然基金重点项目(12JCZDJC28900)、天津市科技兴海项目(KJXH2012-19)资助 （12JCZDJC28900）
