复合材料科学与工程Issue(2)：89-95,101,8.DOI:10.19936/j.cnki.2096-8000.20240228.013
BFRP加固对冻融损伤混凝土短柱承载能力的影响
Effect of BFRP strengthening on bearing capacity of freeze-thaw damaged concrete short columns
李志强 1张宏家 2孙玉洁2
作者信息
- 1. 河北建筑工程学院土木工程学院,张家口 075000||河北省土木工程诊断、改造与抗灾重点试验室,张家口 075000||河北省高校绿色建材与建筑改造应用技术研发中心,张家口 075000
- 2. 河北建筑工程学院土木工程学院,张家口 075000
- 折叠
摘要
Abstract
This paper aimed to reduce the effect of freeze-thaw cycles on the mechanical properties of concrete and to extend the service life of freeze-thaw damaged concrete structures in severe cold regions economically and ef-ficiently.In this study,the effect of BFRP cloth reinforcement layers on the bearing capacity of concrete columns with different freeze-thaw damage was systematically investigated through three BFRP cloth wrapping layers(0,2 and 3 layers)constrained to experience four freeze-thaw cycles(0,25,50 and 75 times)for vegetated concrete short columns.The results show that after freeze-thaw cycles,the ultimate bearing capacity of concrete column is significantly reduced and the ultimate displacement is slightly increased.3 layers of reinforcement increase the ulti-mate bearing capacity of concrete column by 20％,16％,22％and 37％for 0,25,50 and 75 freeze-thaw cycles,and also increase the ultimate displacement significantly.From the analysis of the experimental phenomena and data,it was found that additional reinforcement should be applied to the column ends to obtain better reinforcement results.The simulation results of 12 finite element models were established by using ABAQUS and selecting suitable material intrinsic model with reference to the test,and the results were in good agreement with the test results.After considering the effective restrained area division of the FRP-constrained prismatic column,the ultimate stress for-mula of the BFRP-constrained concrete column and the uniaxial compressive stress principal structure relationship of the freeze-thaw damaged concrete are brought in,and the applicable BFRP-constrained freeze-thaw damaged concrete short column ultimate bearing capacity formula is established.关键词
冻融循环/BFRP加固/力学性能/复合材料Key words
freeze-thaw cycle/BFRP reinforcement/mechanical property/composites分类
通用工业技术引用本文复制引用
李志强,张宏家,孙玉洁..BFRP加固对冻融损伤混凝土短柱承载能力的影响[J].复合材料科学与工程,2024,(2):89-95,101,8.
