无腹筋玄武岩纤维复材筋再生混凝土深受弯构件抗剪性能

发布时间：2018-01-08 20:34

本文关键词：无腹筋玄武岩纤维复材筋再生混凝土深受弯构件抗剪性能　出处：《工业建筑》2017年11期 　论文类型：期刊论文

【摘要】：为研究无腹筋玄武岩纤维(BFRP)筋再生混凝土深受弯构件的破坏模式、开裂荷载、极限荷载、裂缝扩展趋势及变形性能,对9根BFRP筋再生混凝土深受弯构件进行四分点集中力加载试验。考虑影响深受弯构件抗剪性能的主要因素:剪跨比、再生混凝土抗压强度、BFRP筋配筋率、截面有效高度。在此基础上利用ANSYS建立非线性有限元模型进行对比分析。研究结果表明:有限元分析结果与试验结果基本一致;试验梁的抗剪承载力随剪跨比的增大而减小,随纵向BFRP筋配筋率、截面有效高度和再生混凝土抗压强度的提高而呈上升趋势;模拟较好地反映了裂缝发展趋势及BFRP筋的应变;但试验梁的荷载-变形曲线与模拟结果有一定偏差,仍需进一步研究。
[Abstract]:In order to study the failure mode, cracking load, ultimate load, crack propagation trend and deformation performance of recycled concrete reinforced with basalt fiber reinforced concrete without web reinforcement (BFRP), the failure mode, cracking load, ultimate load, crack propagation trend and deformation behavior of deep flexural members are studied. A four-point concentrated load test was carried out on 9 reclaimed concrete members with BFRP tendons. The main factors affecting the shear behavior of deep flexural members were the shear span ratio and compressive strength of recycled concrete. On the basis of BFRP reinforcement ratio and section effective height, the nonlinear finite element model is established by ANSYS. The results show that the finite element analysis results are in good agreement with the experimental results. The shear capacity of the test beams decreases with the increase of the shear span ratio, and increases with the reinforcement ratio of longitudinal BFRP bars, the effective height of section and the compressive strength of recycled concrete. The simulation well reflects the trend of crack development and the strain of BFRP tendons. However, the load-deformation curve of the test beam is deviated from the simulation result, which needs further study.
【作者单位】：辽宁工业大学土木建筑工程学院;
【基金】：辽宁省自然科学基金项目(2015020208)
【分类号】：TU37
【正文快照】： 再生混凝土替代普通混凝土为解决对天然生态环境造成的破坏问题、建筑石材日益短缺问题、城市废弃物填埋占地和环境污染问题提供了有效的途径,具有极其重要的工程应用价值和巨大的社会效益等[1-3]。然而,再生混凝土由于再生粗骨料的自身缺陷,其力学性能低于普通混凝土。因而,

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