Abstract:Sliding isolator is an isolation device of steady performance and simple structural configuration, this paper introduced a novel sliding bearing with friction interface coated with molybdenum disulfide. To study the friction character of the sliding isolator and the isolation effect of parallel isolated building with sliding isolators, quasi-static test, real time hybrid simulation (RTHS) and numerical simulation were applied in this research. The results of quasi-static test showed the friction coefficient of the sliding bearing correlated with horizontal loading frequency and pressure. RTHS, with the sliding bearing as the experimental substructure, the lead rubber bearings and the upper structure as the numerical substructure, investigated the responses of the sliding bearing under earthquakes. Then the RTHS results were compared with finite element analysis results to evaluate isolation effect. It is concluded that the parallel isolated structure with sliding isolators and lead rubber bearings has desirable isolation effect.
[1] 周福霖. 工程结构减震控制[M]. 地震出版社, 1997.
Zhou Fulin. Vibration-Reduction Control of Engineering Structures[M]. Earthquake Publishing House.1997.
[2] Nakashima M, Kato H and Takaoka E. Development of real-time pseudodynamic testing [J]. Earthquake Engineering and Structural Dynamics, 1992,21 (1):79-92.
[3] Dion C, Bouaanani N, Tremblay R, Lamarche C. Real-Time Dynamic Substructuring Testing of a Bridge Equipped with Friction-Based Seismic Isolators[J]. Journal of Bridge Engineering. 2012;17(1):4-14.
[4] Chae Y, Ricles JM, Sause R. Large‐scale real‐time hybrid simulation of a three‐story steel frame building with magneto‐rheological dampers[J]. Earthquake Engineering & Structural Dynamics. 2014;43(13):1915-33.
[5] Spencer BF, Chang C, Asai T. Real-Time Hybrid Simulation of a Smart Base-Isolated Building[J]. Journal of Engineering Mechanics. 2015;141(3):4014128.
[6] 陈永盛,吴斌,王贞,等. 基于Simulink的混合试验系统及其验证[J]. 振动与冲击. 2014;33(7):18-23.
Chen Yong-sheng, Wu Bin, Wang Zhen, et al. Simulation and validation of a hybrid testing system with Simulink[J]. Journal of Vibration. 2014;33(7):18-23.
[7] Darby AP, Williams MS, Blakeborough A. Real-Time Substructure Tests Using Hydraulic Actuator[J]. Journal of Engineering Mechanics. 1999;125(10):1133-9.
[8] 袁涌, 熊世树,青木彻彦. 基于速度控制型子结构试验的橡胶隔振支座性能研究[J]. 振动与冲击.2008,27(6):151-154.
Yuan Yong,Xiong Shishu,Tetushiko Aoki. Rubber Bearing Performance Basing on a Real-time Substructure Hybrid Loading Test with Velocity Control[J]. Journal of Vibration and Shock.2008,27(6):151-154.
[9] Castaneda N, Gao X, Dyke S. A real-time hybrid testing platform for the evaluation of seismic mitigation in building structures[C]. Proceedings of the 2012 Structures Congress Conference, Chicago, USA. 2012.
[10] Chen C, Ricles J M. Improving the inverse compensation method for real-time hybrid simulation through a dual compensation scheme [J]. Earthquake Engineering and Structural Dynamics ,2009,38(10):1237-1255.
[11] Guo T, Chen C, Xu WJ, et al. A frequency response analysis approach for quantitative assessment of actuator tracking for real-time hybrid simulation[J]. Smart Materials and Structures, 2014, 23(4): 045042.
[12] Mercan O. Analytical and experimental studies on large scale real-time pseudo dynamic testing[D]. Lehigh University: Department of Civil and Environmental Engineering, 2007.
[13] Constantinou M C, Tsopelas P, Kasalanati A, et al. Property modification factors for seismic isolation bearings[M]//Technical Report MCEER. US Multidisciplinary Center for Earthquake Engineering Research (MCEER), 1999, 99.