玄武岩筋纤维再生混凝土梁抗剪性能有限元分析  

Numerical simulation analysis of shear performance of FIBER recycled concrete beams with BFRP bars

作　　者：赵琳[1] 王家贺 刘华新[1] ZHAO-Lin;WANG Jia-he;LIU Hua-xin

机构地区：[1]辽宁工业大学土木建筑工程学院,辽宁锦州121001 [2]中交路桥建设有限公司,北京100024

出　　处：《砖瓦》2022年第11期32-35,共4页Brick-tile

基　　金：研究生联合培养基地项目(YJD202102)。

摘　　要：在试验研究的基础上运用ANSYS对11根试验梁的抗剪性能进行数值模拟分析,分析了剪跨比、玄武岩纤维体积掺量和配箍率对试验梁的混凝土应力和裂缝发展、开裂荷载、极限荷载、荷载-跨中挠度曲线的影响。结果表明:随着剪跨比的增大,梁的开裂荷载和抗剪承载力随之降低,挠度略有增大;随着纤维体积掺量的增大,试验梁的开裂荷载与抗剪承载力均有所提高,挠度增大不明显;当配箍率增大,试验梁的开裂荷载与抗剪承载力随之增大,相同荷载下,挠度有明显提高。试验梁的应力云图和裂缝扩展与试验结果基本一致,基于ANSYS可以较好地模拟BFRP筋纤维再生混凝土梁的抗剪过程。In order to study the shear performance of fiber reinforced concrete beams with BFRP bars,11 test beams were numerically simulated by ANSYS on the basis of the test.The shear span ratio,basalt fiber volume content and stirrup ratio were analyzed under different conditions.Analysis of concrete stress and crack develop⁃ment,cracking load,ultimate load,load-span deflection curve.The simulation results show that with the in⁃crease of shear span ratio,the cracking load and shear capacity of the beam decrease,and the deflection increas⁃es slightly.With the increase of fiber volume content,the cracking load and shear capacity of the test beam are increased,but the increase of deflection is not obvious.When the stirrup ratio increases,the cracking load and shear capacity of the test beam increase,and the deflection increases obviously under the same load.Comparing the stress cloud diagram and crack development diagram of the test beam with the test situation,the two condi⁃tions are basically the same,so ANSYS can better simulate the shear process of the fiber recycled concrete beam with BFRP bars.

关 键 词：BFRP筋 纤维再生混凝土 开裂荷载 抗剪性能 数值模拟 

分 类 号：TU528.572[建筑科学—建筑技术科学]