一种非迭代式的分布式子结构混合试验方法
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摘要
该文针对混合试验中的子结构试验积分算法进行研究,提出了一种基于模型的预测-修正算法(M-PC)。M-PC在预测时采用初始刚度求解动力方程以得到预测边界位移,与差分得到的预测位移相比,具有较高的精度和稳定性。M-PC是一种非迭代式的算法,对于子结构边界自由度较多的混合试验,该算法具有效率高的特点。该文首先介绍了M-PC积分算法的基本公式和进行子结构混合试验的具体步骤,然后通过编程实现了与OpenSEES和ABAQUS两种有限元软件的通用接口、电液伺服式加载装置的控制程序以及网络通讯功能,最后通过门式框架的子结构数值试验和物理试验对M-PC算法进行验证。结果表明:M-PC算法有效地预测静力边界位移,结构整体响应合理,正确地模拟了各子结构的非线性行为。
Proposed in this paper is a model-based predicting and correcting algorithm(M-PC) which serves as the time integration algorithm for substructure hybrid tests.M-PC adopts the initial stiffness to solve the equation of motion to predict the boundary displacements.Compared with the difference-based predictor,the model-based predictor is characterized by a better accuracy and stability.M-PC is a non-iterative algorithm which is much efficient particularly for the cases with many degrees of freedom associated with substructure boundaries.The M-PC algorithm is first formulated and procedures to implement hybrid test are given.Then a hybrid test framework is developed to realize the interface to two finite element programs,i.e.,OpenSEES and ABAQUS.The functions to control servo-hydraulic devices and exchange data via Internet are also integrated into the framework.Finally,a numerical hybrid simulation and physical hybrid test are conducted on a portal moment frame.Both results demonstrate that the M-PC algorithm is able to effectively predict the displacement associated with static boundaries.The responses of the entire structure are reasonable and correctly reproduce the nonlinearities of two substructures.
Proposed in this paper is a model-based predicting and correcting algorithm(M-PC) which serves as the time integration algorithm for substructure hybrid tests.M-PC adopts the initial stiffness to solve the equation of motion to predict the boundary displacements.Compared with the difference-based predictor,the model-based predictor is characterized by a better accuracy and stability.M-PC is a non-iterative algorithm which is much efficient particularly for the cases with many degrees of freedom associated with substructure boundaries.The M-PC algorithm is first formulated and procedures to implement hybrid test are given.Then a hybrid test framework is developed to realize the interface to two finite element programs,i.e.,OpenSEES and ABAQUS.The functions to control servo-hydraulic devices and exchange data via Internet are also integrated into the framework.Finally,a numerical hybrid simulation and physical hybrid test are conducted on a portal moment frame.Both results demonstrate that the M-PC algorithm is able to effectively predict the displacement associated with static boundaries.The responses of the entire structure are reasonable and correctly reproduce the nonlinearities of two substructures.
引文
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[2]郭迅.地震工程试验联网最新进展[J].地震工程与工程振动,2006,26(4):37―41.Guo Xun.New advances of the project of network ofearthquake engineering simulation[J].EarthquakeEngineering and Engineering Vibration,2006,26(4):37―41.(in Chinese)
[3]邱法维.结构抗震试验方法进展[J].土木工程学报,2004,37(10):19―27.Qiu Fawei.Developments of seismic testing methods forstructures[J].China Civil Engineering Journal,2004,37(10):19―27.(in Chinese)
[4]Nakashima M,Ishii K,Kamagata S,et al.Feasibility ofpseudo dynamic test using substructuring techniques[C].Proceeding of 9th World Conference on EarthquakeEngineering.Tokyo,Japan,1988,4:47―52.
[5]Nakashima M,Kaminosono T,Ishida M,Ando K.Integration techniques for substructure pseudodynamictest[C].Proceedings of the 4th U.S.National Conferenceon Earthquake Engineering.Palm Springs,California,US,1990,2:515―524.
[6]Combescure D,Pegon P.α-operator splitting timeintegration technique for PSD testing error propagationanalysis[J].Soil Dynamics and Earthquake Engineering,1997,16:427―443.
[7]Ghaboussi J,Yun G J,Hashash Y M A.A novelpredictor-corrector algorithm for sub-structurepseudo-dynamic testing[J].Earthquake Engineering andStructural Dynamics,2006,35:453―476.
[8]Belytschko T,Hughes T J R.Computational methods fortransient analysis,Vol.1:Computational methods inmechanics[M].Amsterdam,Netherlands:ElsevierScience B.V.,2001:81.
[9]ABAQUS Inc..ABAQUS Version 6.8 Documentation[M].2008.
[10]戴在平,刘蓉,凌朝东.基于LabVIEW实现网络远程通信[J].国外电子测量技术,2004(增刊1):62―64.Dai Zaiping,Liu Rong,Ling Chaodong.Network remotecommunication based on LabVIEW[J].ForeignElectronic Measurement Technology,2004(Suppl 1):62―64.(in Chinese)
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