摘要
为研究超高性能混凝土(UHPC)板柱节点在不同参数下的力学性能,本文结合已有的板柱节点冲切破坏试验,通过ABAQUS有限元软件对试验进行建模,并对比试验结果与模拟结果,以验证有限元模型的准确性。在验证基础上,改变UHPC的范围、混凝土的强度和钢筋配筋率,共建立了49组有限元模型,以分析不同参数对UHPC板柱节点力学性能的影响。研究结果表明:不同UHPC区域面积的板柱节点模型会显著影响挠度和承载力,其中UHPC区域面积在2倍板厚到5倍板厚之间提升效果显著;UHPC与普通混凝土(NC)强度的提高对构件承载力有不同程度的提升作用;钢筋配筋率的增加会使UHPC板柱节点构件的挠度逐渐减小,并显著提高其极限抗冲切承载能力。
To investigate the mechanical performance of ultra-high performance concrete(UHPC)slab-column joints under different parameters,this study utilizes existing punching shear tests on slab-column joints and models them using the ABAQUS finite element software.By comparing the experimental results with the simulation results,the accuracy of the finite element model is verified.Based on this verification,49 finite element models were established by varying the UHPC range,concrete strength,and reinforcement ratio to analyze the mechanical performance of UHPC slab-column joints under different parameters.The results indicate that different UHPC area sizes significantly affect the deflection and bearing capacity of the slab-column joint models,with notable improvements observed when the UHPC area ranges from 2 to 5 times the slab thickness.Additionally,increasing the strength of UHPC and normal concrete(NC)enhances the bearing capacity of the components to varying degrees.The increase in reinforcement ratio gradually reduces the deflection of the UHPC slab-column joint components and significantly enhances their ultimate punching shear capacity.
作者
顾凯欣
梁诗雪
吴君宁
高佳辉
Kaixin Gu;Shixue Liang;Junning Wu;Jiahui Gao(School of Civil Engineering and Architecture,Zhejiang Sci-Tech University,Hangzhou Zhejiang)
出处
《建模与仿真》
2024年第5期5651-5663,共13页
Modeling and Simulation
关键词
UHPC
板柱节点
抗冲切
有限元模拟
力学性能
UHPC
Slab-Column Nodes
Punch Shear Resistance
Finite Element Simulation
Mechanical Properties
