钢筋混凝土结构的模型更新混合试验方法
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摘要
当结构在极端荷载作用下进入强非线性时,混合试验数值子结构是否能够准确模拟结构的强非线性成为关注焦点。模型更新从本构模型参数准确性的角度出发,提出了在线更新数值子结构本构模型参数的概念。由于构件本构模型与截面本构模型具有一定局限性,现有构件、截面本构模型更新的混合试验很难满足大型复杂结构的需求。作者从材料层次出发,采用混凝土本构模型参数的识别方法,并将其应用于钢筋混凝土结构的在线更新混合试验中。通过完成平面混凝土框架3种工况的混合试验,对混凝土材料本构参数识别方法和在线模型更新混合试验进行了验证。试验结果表明该参数识别方法具有较好的收敛速度和稳定性;混凝土本构模型参数的在线更新提高了数值子结构的准确性,进而提高了混合试验的可靠性。
The accuracy of numerical substructures in structural hybrid simulation attracts more and more attention, especially when structures experience strong nonlinearity under extreme loadings. Model updating technique concerning on the accuracy of the parameters for the constitutive model is proposed to online update these parameters of numerical substructures. Due to their certain limitation, the component and sectional constitutive model for parameter updating in hybrid simulations cannot satisfy the requirements of large, complicated structures. To this end, the parameter identification of material constitutive model is proposed and applied to the hybrid simulation of RC frame structures. The identification of the parameters for concrete constitutive law and the hybrid simulation with model updating were validated through three cases of RC frame hybrid simulation. Results show that the convergence speed and stability of the parameter identification are quite good; the credibility of the hybrid simulation is highly enhanced by improving the accuracy of numerical substructures.
The accuracy of numerical substructures in structural hybrid simulation attracts more and more attention, especially when structures experience strong nonlinearity under extreme loadings. Model updating technique concerning on the accuracy of the parameters for the constitutive model is proposed to online update these parameters of numerical substructures. Due to their certain limitation, the component and sectional constitutive model for parameter updating in hybrid simulations cannot satisfy the requirements of large, complicated structures. To this end, the parameter identification of material constitutive model is proposed and applied to the hybrid simulation of RC frame structures. The identification of the parameters for concrete constitutive law and the hybrid simulation with model updating were validated through three cases of RC frame hybrid simulation. Results show that the convergence speed and stability of the parameter identification are quite good; the credibility of the hybrid simulation is highly enhanced by improving the accuracy of numerical substructures.
引文
[1]Zhang Yu,Pan Peng.Parallel computing method for structural seismic response analysis considering interaction between substructures[J].Engineering Mechanics,2013,30(5):118-124.[张钰,潘鹏.考虑子结构间相互作用的结构地震反应并行计算方法研究[J].工程力学,2013,30(5):118-124.]
[2]Pinto A V,Pegon P,Magonette G,et al.Pseudo-dynamic testing of bridges using non-linear substructuring[J].Earthquake Engineering and Structural Dynamics,2004,33:1125-1146.
[3]Lamarche C P,Bonelli A,Bursi O S A.Rosenbrock-W method for real-time dynamic substructuring and pseudo-dynamic testing[J].Earthquake Engineering and Structural Dynamics,2009,38(9):1071-1092.
[4]Wang Zhen,Liu Jinjin,Wu Bin.Parameter determination of nearly-complete compensation scheme for time delay in realtime hybrid simulation[J].Engineering Mechanics,2014,31(10):158-166.[王贞,刘进进,吴斌.实时混合试验近完全时滞补偿方法的参数确定[J].工程力学,2014,31(10):158-166.]
[5]Abbiati G,Bursi O S,Caparan P.Hybrid simulation of a multi-span RC viaduct with plain bars and sliding bearings[J].Earthquake Engineering and Structural Dynamics,2015,44(13):2221-2224.
[6]Wang Tao,Wu Bin.Hybrid testing method based on model updating with constrained unscented Kalman filter[J].Journal of Earthquake Engineering and Engineering vibration,2013,33(5):100-109.[王涛,吴斌.基于约束UKF模型更新的混合实验方法[J].地震工程与工程振动,2013,33(5):100-109.]
[7]Kwon O S.Model updating method for substructure pseudo-dynamic hybrid simulation[J].Earthquake Engineering&Structural Dynamics,2013,42(13):1917-1984.
[8]Hashemi M J,Masroor A.Implementation of online model updating in hybrid simulation[J].Earthquake Engineering and Structural Dynamics,2014,43(3):395-42.
[9]Wu Bin,Chen Yongsheng,Xu Guoshan,et al.Hybrid simulation of steel frame structures with sectional model updating[J].Earthquake Engineering and Structural Dynamics,2016,45:1251-1269.
[10]Song W,Dyke S.Real-time dynamic model updating of a hysteretic structural system[J].Journal of Structural Engineering,2014,140(3):1-14.
[11]Mei Zhu,Wu Bin,Yang Ge.Online parameter identification of concrete constitutive model[J].Engineering Mechanics,2016,33(7):108-115.[梅竹,吴斌,杨格.钢筋混凝土结构材料本构模型参数的在线识别[J].工程力学,2016,33(7):108-115.]
[12]Julier S.A general method for approximating nonlinear transformations of probability distributions[D].Oxford:University of Oxford,1996:1-27.
[2]Pinto A V,Pegon P,Magonette G,et al.Pseudo-dynamic testing of bridges using non-linear substructuring[J].Earthquake Engineering and Structural Dynamics,2004,33:1125-1146.
[3]Lamarche C P,Bonelli A,Bursi O S A.Rosenbrock-W method for real-time dynamic substructuring and pseudo-dynamic testing[J].Earthquake Engineering and Structural Dynamics,2009,38(9):1071-1092.
[4]Wang Zhen,Liu Jinjin,Wu Bin.Parameter determination of nearly-complete compensation scheme for time delay in realtime hybrid simulation[J].Engineering Mechanics,2014,31(10):158-166.[王贞,刘进进,吴斌.实时混合试验近完全时滞补偿方法的参数确定[J].工程力学,2014,31(10):158-166.]
[5]Abbiati G,Bursi O S,Caparan P.Hybrid simulation of a multi-span RC viaduct with plain bars and sliding bearings[J].Earthquake Engineering and Structural Dynamics,2015,44(13):2221-2224.
[6]Wang Tao,Wu Bin.Hybrid testing method based on model updating with constrained unscented Kalman filter[J].Journal of Earthquake Engineering and Engineering vibration,2013,33(5):100-109.[王涛,吴斌.基于约束UKF模型更新的混合实验方法[J].地震工程与工程振动,2013,33(5):100-109.]
[7]Kwon O S.Model updating method for substructure pseudo-dynamic hybrid simulation[J].Earthquake Engineering&Structural Dynamics,2013,42(13):1917-1984.
[8]Hashemi M J,Masroor A.Implementation of online model updating in hybrid simulation[J].Earthquake Engineering and Structural Dynamics,2014,43(3):395-42.
[9]Wu Bin,Chen Yongsheng,Xu Guoshan,et al.Hybrid simulation of steel frame structures with sectional model updating[J].Earthquake Engineering and Structural Dynamics,2016,45:1251-1269.
[10]Song W,Dyke S.Real-time dynamic model updating of a hysteretic structural system[J].Journal of Structural Engineering,2014,140(3):1-14.
[11]Mei Zhu,Wu Bin,Yang Ge.Online parameter identification of concrete constitutive model[J].Engineering Mechanics,2016,33(7):108-115.[梅竹,吴斌,杨格.钢筋混凝土结构材料本构模型参数的在线识别[J].工程力学,2016,33(7):108-115.]
[12]Julier S.A general method for approximating nonlinear transformations of probability distributions[D].Oxford:University of Oxford,1996:1-27.
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