考虑柱脚纵筋滑移的平面框架拟静力试验数值模拟
|
摘要
目前对于钢筋混凝土框架的数值模拟大多没有考虑柱子底部纵筋的滑移。基于OpenSEES平台对一榀三层三跨的带有翼缘板的混凝土框架多点位移控制的低周反复加载试验进行模拟。通过在柱纤维单元下串联一个零长度截面单元来模拟底层柱脚的应变渗透现象,用bond-slip材料定义柱底纵筋的粘结滑移关系。数值模拟结果表明:考虑柱底纵筋滑移模型较不考虑柱底纵筋滑移模型与实验结果吻合更好,但是后期模拟值略小于实验值。因此,柱底纵筋应力滑移模型仍需进一步试验研究和验证。
Most numerical simulations of the concrete frame neglect the rebar slippage at the column base so far.This paper uses the OpenSEES to conduct numerical simulation of a concrete frame under reversed-cyclic loads.Based on the fiber model,a zero-length section element was combined at the bottom with the nonlinear beam-column element,which was used to simulate the bar slippage at column ends.This proposed model is better than the conventional model because it close not needs to consider slippage in the earlier stage.But the result still shows some differences against the test result.Further experimental study should be done to calibrate the bar stress-slip relation at column base.
Most numerical simulations of the concrete frame neglect the rebar slippage at the column base so far.This paper uses the OpenSEES to conduct numerical simulation of a concrete frame under reversed-cyclic loads.Based on the fiber model,a zero-length section element was combined at the bottom with the nonlinear beam-column element,which was used to simulate the bar slippage at column ends.This proposed model is better than the conventional model because it close not needs to consider slippage in the earlier stage.But the result still shows some differences against the test result.Further experimental study should be done to calibrate the bar stress-slip relation at column base.
引文
[1]陈滔,黄宗明.钢筋混凝土框架非弹性地震反应分析模型研究进展[J].世界地震工程,2002,12(1):91-97.Chen Tao,Huang Zongming.A review of inelastic dynamic analysis models of reinforced concrete frames under earthquake ground motions[J].World Earth-quake Engineering,2002,12(1):91-97.(in Chi-nese)
[2]杨红,徐海英,王志军.考虑柱底纵筋滑移的纤维模型及框架地震反应分析[J].建筑结构学报,2009,30(4):130-137.Yang Hong,Xu Haiying,Wang Zhijun.Seismic re-sponses analysis of RC frame based on fibermodel considering bar slippage at column bottom section[J].Journal of Building Structures,2009,30(4):130-137.(in Chinese)
[3]Mazzoni S,McKenna F,Fenves G L.OpenSees Command Language Manual[Z].Berkeley:PEER,University of California,2007.
[4]Kent D C,Park R.Flexural members with confined concrete[J].Journal of the Structural Division,1971,97(7):1969-1990.
[5]过镇海.混凝土的强度和本构关系—原理与应用[M].北京:中国建筑工业出版社,2004:22-23.Guo Zhenhai.The strength and constitutive model of concrete:theory and application[M].Beijing:China Architecture&Building Press,2005:145-146.(in Chinese)
[6]Filippou F C,Popov E P,Bertero V V.Effects of bond deterioration on hysteretic behavior of reinforced concrete joints[R].Report EERC83-19,Earthquake Engineering Research Center,University of Califor-nia,Berkeley,1983.
[7]Zhao J,Sritharan S.Modelling of strain penetration effects in fibre-based analysis of reinforced concrete structures[J].ACI Structural Journal,2007,104(2):133-141.
[8]Ueda T,L in I,Hawkins N.Beam bar anchorage in exterior column-beam connections[J].ACI Structural Journal,1986,83(3):412-422.
[9]Lin I.Anchorage characteristics for reinforcing bars subjected to reversed cyclic loading[D].Seattle,WA:University of Washington,1981.
[10]Lowes L N,Nilanjan Mitra,Arash Altoontash.A beam-column joint model for simulating the earth-quake response of reinforced concrete frames[R].Pacific Earthquake Engineering Research Report,PEER,2003.
[2]杨红,徐海英,王志军.考虑柱底纵筋滑移的纤维模型及框架地震反应分析[J].建筑结构学报,2009,30(4):130-137.Yang Hong,Xu Haiying,Wang Zhijun.Seismic re-sponses analysis of RC frame based on fibermodel considering bar slippage at column bottom section[J].Journal of Building Structures,2009,30(4):130-137.(in Chinese)
[3]Mazzoni S,McKenna F,Fenves G L.OpenSees Command Language Manual[Z].Berkeley:PEER,University of California,2007.
[4]Kent D C,Park R.Flexural members with confined concrete[J].Journal of the Structural Division,1971,97(7):1969-1990.
[5]过镇海.混凝土的强度和本构关系—原理与应用[M].北京:中国建筑工业出版社,2004:22-23.Guo Zhenhai.The strength and constitutive model of concrete:theory and application[M].Beijing:China Architecture&Building Press,2005:145-146.(in Chinese)
[6]Filippou F C,Popov E P,Bertero V V.Effects of bond deterioration on hysteretic behavior of reinforced concrete joints[R].Report EERC83-19,Earthquake Engineering Research Center,University of Califor-nia,Berkeley,1983.
[7]Zhao J,Sritharan S.Modelling of strain penetration effects in fibre-based analysis of reinforced concrete structures[J].ACI Structural Journal,2007,104(2):133-141.
[8]Ueda T,L in I,Hawkins N.Beam bar anchorage in exterior column-beam connections[J].ACI Structural Journal,1986,83(3):412-422.
[9]Lin I.Anchorage characteristics for reinforcing bars subjected to reversed cyclic loading[D].Seattle,WA:University of Washington,1981.
[10]Lowes L N,Nilanjan Mitra,Arash Altoontash.A beam-column joint model for simulating the earth-quake response of reinforced concrete frames[R].Pacific Earthquake Engineering Research Report,PEER,2003.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心