考虑施工缝影响的钢筋混凝土柱滞回特性
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摘要
以两组(Z4组、Z3组)尺寸、材料、配筋形式、荷载完全相同的整浇柱与带缝柱的试验数据为基础,采用基于材料本构关系的纤维模型对整浇柱及带缝柱的滞回特性进行数值模拟。在纤维模型中,采用非线性零长截面单元来模拟施工缝,同时考虑缝面处钢筋的滑移以及剪切恢复力模型来模拟带缝柱的静力非线性行为。通过模拟结果与试验数据进行对比,验证模型的可行性,提出一种施工缝模型化的方法。
Based on the experimental data of two pairs of columns with the same size,material,volume of ties and load,and with the only difference that one column has construction joint,and the other has not.Zero-length element was used to simulate the column with joint.The way of simulating construction joints was put forward in two sides,one was considering slip of steel bars,and the other was considering restoring shear model of columns with construction joint.Through the contrast of the experimental result and simulating result,the way of simulating columns with construction joint was validated.
Based on the experimental data of two pairs of columns with the same size,material,volume of ties and load,and with the only difference that one column has construction joint,and the other has not.Zero-length element was used to simulate the column with joint.The way of simulating construction joints was put forward in two sides,one was considering slip of steel bars,and the other was considering restoring shear model of columns with construction joint.Through the contrast of the experimental result and simulating result,the way of simulating columns with construction joint was validated.
引文
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[2]ZHAO JIAN,SRITHARAN S.Modeling of strain pene-tration effects in fiber-based analysis of reinforcedconcrete structures[J].ACI Structural Journal,2007,104(2):133-141.
[3]MAZZONI S,MCKENNA F,SCOOT M H,et al Open-Sees users manual[R].Berkeley,CA:University ofCalifornia,2006.
[4]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).
[5]OZCEBE G,SAATCIOGLU M.Hysteretic shear modelfor RC members[J].Structure Engineering,1989,115(1).
[6]张令心,杨桦,等.剪力墙的剪切滞变模型[J].世界地震工程,1999,15(2):9-16.
[7]ATALAY M,PENZIEN J.Behavior of critical regionsof reinforced concrete components as influenced bymoment,shear and axial force[R].UCB/EERC-75/19,University of California Berkeley,Calif.EarthquakeEngrg.Res.Ctr,1975.
[8]臧登科.纤维模型中考虑剪切效应的RC结构非线性特征研究[D].重庆:重庆大学.2008.
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