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6篇 您的检索式：作者名="M.Ricles"

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		题名	作者	年代	出处	被引量
	1	Ductility demands on buckling-restrained braced frames under earthquake loading显示文摘Accurate estimates of ductility demands on buckling-restrained braced frames (BRBFs) are crucial to performance-based design of BRBFs. An analytical study on the seismic behavior of BRBFs has been conducted at the ATLSS Center, Lehigh University to prepare for an upcoming experimental program. The analysis program DRAIN-2DX was used to model a one-bay, four-story prototype BRBF including material and geometric nonlinearities. The bucklingrestrained brace (BRB) model incorporates both isotropic and kinematic hardening. Nonlinear static pushover and timehistory analyses were performed on the prototype BRBF. Performance objectives for the BRBs were defined and uscd to evaluate thc time-history analysis results. Particular emphasis was placed on global ductility demands and ductility demands oa the BRBs. These demands were compared with anticipated ductility capacities. The analysis results, along with results from similar previous studics, are used to evaluate the BRBF design provisions that have been recommended for codification in the United States. Thc results show that BRB maximum ductility demands can be as high as 20 to 25. These demands significantly exceed those anticipated by the BRBF recommended provisions. Results from the static pushover and timehistory analyses are used to demonstrate why the ductility demands exceed those anticipated by the recommended provisions.The BRB qualification testing protocol contained in the BRBF recommended provisions is shown to be inadequate because it requires only a maximum ductility demand of at most 7.5. Modifications to the testing protocol are recommended.	Larry A.Fahnestock Richard Sause James M.Ricles Le-Wu Lu	2003	Earthquake Engineering and Engineering Vibration2003，2，2：	11
	2	Large‐scale real‐time hybrid simulation involving multiple experimental substructures and adaptive actuator delay compensation显示文摘	ChengChen James M.Ricles	2012	Earthquake Engng Struct Dyn2012，，3：	1
	3	Stability analysis for real‐time pseudodynamic and hybrid pseudodynamic testing with multiple sources of delay显示文摘	OyaMercan James M.Ricles	2008	Earthquake Engng Struct Dyn2008，，10：	1
	4	Stability analysis of SDOF real‐time hybrid testing systems with explicit integration algorithms and actuator delay显示文摘	ChengChen James M.Ricles	2008	Earthquake Engng Struct Dyn2008，，4：	1
	5	Stability and accuracy analysis of outer loop dynamics in real‐time pseudodynamic testing of SDOF systems显示文摘	OyaMercan James M.Ricles	2007	Earthquake Engng Struct Dyn2007，，11：	1
	6	A model reference adaptive control based method for actuator delay estimation in real-time testing显示文摘Real-time testing provides a viable experimental technique to evaluate the performance of structural systems subjected to dynamic loading.Servo-hydraulic actuators are often utilized to apply calculated displacements from an integration algorithm to the experimental structures in a real-time manner.The compensation of actuator delay is therefore critical to achieve stable and reliable experimental results.The advances in compensation methods based on adaptive control theory enable researchers to accommodate variable actuator delay and achieve good actuator control for real-time tests.However,these adaptive methods all require time duration for actuator delay adaptation.Experiments show that a good actuator delay estimate can help optimize the performance of the adaptive compensation methods.The rate of adaptation also requires that a good actuator delay estimate be acquired especially for the tests where the peak structural response might occur at the beginning of the tests.This paper presents a model reference adaptive control based method to identify the parameter of a simplified discrete model for servo-hydraulic dynamics and the resulting compensation method.Simulations are conducted using both numerical analysis and experimental results to evaluate the effectiveness of the proposed estimation method.	Cheng CHEN James M.RICLES	2010	Frontiers of Structural and Civil Engineering2010，4，3：	0

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