预应力混凝土扁梁框架内节点的三维有限元模拟分析
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摘要
为了分析轴压比对预应力混凝土扁梁框架内节点抗震性能的影响,运用ANSYS软件,模拟了单调荷载作用下预应力混凝土扁梁框架内节点的荷载-位移曲线,并与相应的试验结果进行比较分析。在有限元模拟试验的扁梁框架内节点的基础上,用ANSYS软件模拟了未做过试验的不同轴压比下的扁梁框架内节点荷载-位移曲线,模拟结果表明,轴压比的增大在一定程度上可以提高试件的承载力,但是太大的轴压比则会使试件的延性不足,反而会对抗震不利。
To analyze the impact of axial compression ratio on the seismic behavior of inner joints of prestressed concrete flat-beam frame,load-displacement curves of inner joints of prestressed concrete flat-beam frame under laterally monotonic load were simulated by ANSYS software,and the analysis results were compared with the experimental results.Based on the finite element analysis results,the load-displacement curves of inner joints of prestessed concrete flat-beam frame with different axial compression ratios were obtained through the simulative analysis with ANSYS software.It is demonstrated that,with the increase of axial compression ratio,the loading capacity of specimens can be improved in certain degree,but the ductility of specimens will reduce too much caused by too big axial compression ratio,which is disadvantageous to resist earthquakes.
To analyze the impact of axial compression ratio on the seismic behavior of inner joints of prestressed concrete flat-beam frame,load-displacement curves of inner joints of prestressed concrete flat-beam frame under laterally monotonic load were simulated by ANSYS software,and the analysis results were compared with the experimental results.Based on the finite element analysis results,the load-displacement curves of inner joints of prestessed concrete flat-beam frame with different axial compression ratios were obtained through the simulative analysis with ANSYS software.It is demonstrated that,with the increase of axial compression ratio,the loading capacity of specimens can be improved in certain degree,but the ductility of specimens will reduce too much caused by too big axial compression ratio,which is disadvantageous to resist earthquakes.
引文
1程浩德,房贞政,周翔.考虑轴压比影响的预应力混凝土扁梁框架内节点抗震性能试验研究[J].地震工程与工程振动,2005,25(4):99-104.
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3顾磊,焦彬如,严家熺.无粘接预应力混凝土扁梁-平板楼盖体系的受力分析和设计计算[J].建筑结构学报,1995,16(5):3-9.
4房贞政,李斌,郑则群.部分预应力混凝土扁梁框架节点的拟静力试验研究[J].地震工程与振动工程,2003,23(4):111-116.
5陈鸿媛,房贞政,林希.无粘接部分预应力混凝土扁梁框架抗震性能试验研究[J].地震工程与振动工程,2003,23(6):91-96.
6别怀庆,宫锡胜.浅谈某工程预应力的设计与施工[J].安徽建筑工业学院学报,2007(1).
7江见鲸,陆新征,叶列平.混凝土结构有限元分析[M].北京:清华大学出版社,2004.
8过镇海.混凝土的强度和本构关系[M].北京:中国建筑工业出版社,2004.
2何利,段建中.预应力混凝土扁梁节点性能的试验研究[J].建筑结构,1999,(8):18-26.
3顾磊,焦彬如,严家熺.无粘接预应力混凝土扁梁-平板楼盖体系的受力分析和设计计算[J].建筑结构学报,1995,16(5):3-9.
4房贞政,李斌,郑则群.部分预应力混凝土扁梁框架节点的拟静力试验研究[J].地震工程与振动工程,2003,23(4):111-116.
5陈鸿媛,房贞政,林希.无粘接部分预应力混凝土扁梁框架抗震性能试验研究[J].地震工程与振动工程,2003,23(6):91-96.
6别怀庆,宫锡胜.浅谈某工程预应力的设计与施工[J].安徽建筑工业学院学报,2007(1).
7江见鲸,陆新征,叶列平.混凝土结构有限元分析[M].北京:清华大学出版社,2004.
8过镇海.混凝土的强度和本构关系[M].北京:中国建筑工业出版社,2004.
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