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。
In order to investigate the failure mode,cracking load,ultimate load,crack extension trend and the characteristics of the load-deformation relationship of Basalt fiber reinforced plastics（BFRP） reinforced recycled aggregate concrete deep beams without stirrups,a total of 9 beams reinforced with BFRP bars were tested under fourpoint loading.The main effects of shear-span ratio,concrete compressive strength,reinforcement ratio and section effective depth on the ultimate shear behavior were considered.The nonlinear finite element model was established by using ANSYS based on the experimental study.The results showed that the finite element analysis was basically consistent with experimental results.The shear bearing capacity of test beams decreased with the increasing of shearspan ratio,while increased with the increasing of longitudinal BFRP reinforcement ratio,sectional effective height and recycled concrete compressive strength.The simulation results well reflected the development trend of cracks and the strain of BFRP bars.The load-deformation curves and the simulated results of the test beams had a certain deviation,which still need further study.
出处
《工业建筑》
CSCD
北大核心
2017年第11期28-34,共7页
Industrial Construction
基金
辽宁省自然科学基金项目(2015020208)
关键词
BFRP筋
再生混凝土
深受弯构件
有限元分析
抗剪性能
BFRP rebar
recycled aggregate concrete
deep bending member
finite element analysis
shear behavior
