利用混凝土高应变损伤累积本构模型的模拟分析
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摘要
在试验结果的基础上,通过对以往假定的混凝土卸载-再加载本构模型做出重要调整,提出了能够在任意加载模式下较好反映混凝土材料累积损伤规律的本构模型,以反映加载历史对混凝土在滞回过程中的强度、刚度退化和滞回耗能的影响,同时编制了混凝土材料应力-应变反应分析程序,并添加到基于柔度法的纤维模型梁柱单元非线性有限元分析程序中去,分别对本文试验和所收集到的柱子低周疲劳试验进行对比模拟分析,在材料层次和构件层次上初步验证了本文模型的有效性。
Based on the results of experiments,in order to reflect the influence of loading history on the intensity,stiffness and hysteretic energy of concrete under cyclic loading,this paper had modified the former concrete unloading-reloading constitutive model and put up a kind of constitutive model which was valid under random loading history on the base of fatigue tests.Synchronously,the concrete material stress-strain behavior is developed to be analysis program and inserted it into the FEDEAS program as a subprogram.The validity and reliability of the model in this paper were proved in material and member hierarchy by comparing the calculated results with the test results of cyclic loading tests and the column tests we collected.
Based on the results of experiments,in order to reflect the influence of loading history on the intensity,stiffness and hysteretic energy of concrete under cyclic loading,this paper had modified the former concrete unloading-reloading constitutive model and put up a kind of constitutive model which was valid under random loading history on the base of fatigue tests.Synchronously,the concrete material stress-strain behavior is developed to be analysis program and inserted it into the FEDEAS program as a subprogram.The validity and reliability of the model in this paper were proved in material and member hierarchy by comparing the calculated results with the test results of cyclic loading tests and the column tests we collected.
引文
1]周文峰.结构地震动力反应分析中的混凝土恢复力模型的适用性研究[D].重庆:重庆大学,2003.
2]傅剑平,慕遂峰,白绍良.高应变状态下混凝土的等应变幅重复受压性能试验研究[J].工程力学,2005.
3]吴从超.混凝土高压应变下累积损伤本构规律研究[D].重庆:重庆大学,2006.
4]陈滔.基于有限单元柔度法的钢筋混凝土框架三维非弹性地震反应分析[D].重庆:重庆大学,2003.
5]DUANE E OTTER,ANTOINE E NAAMAN.Model forresponse of concrete to random compressive loads[J].ASCE,ST11,1989.
6]EI-BAHY A,KUNNATH S K.Cumulative seismicdamage of circular bridge columns:benchmark and low-cycle fatigue tests[J].ACI Structural Journal,1999,96(4):633-641.
7]EI-BAHY A,KUNNATH S K.Cumulative seismicdamage of circular bridge columns:variable amplitudetests[J].ACI Structural Journal,1999,96(5):711-719.
8]SHEIKH UZUMERI.Strength and ductility of tiedconcrete column[J].ASCE,1980.
2]傅剑平,慕遂峰,白绍良.高应变状态下混凝土的等应变幅重复受压性能试验研究[J].工程力学,2005.
3]吴从超.混凝土高压应变下累积损伤本构规律研究[D].重庆:重庆大学,2006.
4]陈滔.基于有限单元柔度法的钢筋混凝土框架三维非弹性地震反应分析[D].重庆:重庆大学,2003.
5]DUANE E OTTER,ANTOINE E NAAMAN.Model forresponse of concrete to random compressive loads[J].ASCE,ST11,1989.
6]EI-BAHY A,KUNNATH S K.Cumulative seismicdamage of circular bridge columns:benchmark and low-cycle fatigue tests[J].ACI Structural Journal,1999,96(4):633-641.
7]EI-BAHY A,KUNNATH S K.Cumulative seismicdamage of circular bridge columns:variable amplitudetests[J].ACI Structural Journal,1999,96(5):711-719.
8]SHEIKH UZUMERI.Strength and ductility of tiedconcrete column[J].ASCE,1980.
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