Investigations of the effects of a passive bumper on the seismic response of base-isolated buildings: Experimental study and parameter optimization

Abstract

The horizontal displacement values experienced by the isolation layer of base-isolated buildings can exceed the allowable range and cause failures during the rare or very-rare earthquakes. Excessive horizontal displacements of the isolation layer may cause collisions between the building and retaining walls of the isolation ditch and even cause the collapse of the isolated building. This paper proposes a cost-effective, easy-to-build, passive bumper device, called Flexible Limit Protective Device (FLPD) in order to act as shock-absorbers. Through numerical simulations and experiments, the nonlinear behavior of the FLPD is investigated. Subsequently, through structural simulations, the effectiveness of using FLPDs is studied. The elitist non-dominated sorting genetic algorithm (NSGA-II) is used to optimize the design of FLPDs, and the response of structures equipped with optimized FLPDs are simulated numerically. The results indicate that proposed optimized FLPDs can effectively work as shock-absorbers for base-isolated structures. This paper can provide a guideline for the design of shock-absorbers.

Keywords

base isolation shock-absorbers passive bumper compression tests NSGA-II parameter optimization

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References

Burchfiel

Royden

van der Hilst

, et al. (2008) A geological and geophysical context for the Wenchuan earthquake of 12 May 2008, Sichuan, People’s Republic of China. GSA Today 18(7): 4–11.

Deb

Kumar

(2007a) Interactive evolutionary multi-objective optimization and decision-making using reference direction method. In: Proceeding of the genetic and evolutionary computation conference (GECCO-2007), London, UK, 7–11 July 2007. New York: The association of computing machinery (ACM), pp. 781–788.

Deb

Kumar

(2007b) Light beam search based multi-objective optimization using evolutionary algorithms. In: Proceeding of the genetic and evolutionary computation conference GEC07, London, UK, 7–11 July 2007, pp. 2125–2132.

Deb

Sundar

(2006) Reference point based multi-objective optimization using evolutionary algorithms. International Journal of Computational Intelligence Research 2(6): 273–286.

GB/T 20688.1 2007 (2007) Rubber Bearings: Part I: Seismic Protection Isolation Isolators Test Methods. Beijing, China: China Standards Press.

GB 18306-2015 (2016) Seismic Ground Motion Parameters Zonation Map of China. Beijing, China: China Standards Press.

GB 50011-2010 (2016) Code for Seismic Design of Buildings. Beijing, China: China Standards Press.

Ismail

Rodellar

Pozo

(2014b) An isolation device for near-fault ground motions. Structural Control and Health Monitoring 21: 249–268.

Ismail

Rodellar

Pozo

(2015) Passive and hybrid mitigation of potential near-fault inner pounding of a self-braking seismic isolator. Soil Dynamics and Earthquake Engineering 69: 233–250.

10.

Ismail

López-Almansa

Benavent-Climent

, et al. (2014a) Finite element code-based modeling of a multi-feature isolation system and passive alleviation of possible inner pounding. International Journal of Advanced Structural 6: 69.

11.

Jangid

(2010) Stochastic response of building frames isolated by lead-rubber bearings. Structural Control and Health Monitoring 17: 1–22.

12.

Komodromos

(2008) Simulation of the earthquake-induced pounding of seismically isolated buildings. Computers and Structures 86: 618–626.

13.

Kishida

Nishimura

Yamashita

, et al. (2017) Response reduction methods for base isolated buildings with collision to retaining walls. In: Society of Photo-Optical Instrumentation, Conference on Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems, Portland, OR.

14.

Mullins

(2012) Softening of rubber by deformation. Rubber Chemistry and Technology 42(1): 339–362.

15.

Morales

(2021) Narrowbandness of seismic ground displacement on a broader area of the lithosphere and importance on base motion in isolated structures. Journal of Vibroengineering 23(2): 400–406.

16.

Nicos

Constantinou

(1990) Viscous damper: testing, modeling and application of seismic isolation. NCEER Rep. 90-0028. New York: State University of New York at Baffalo.

17.

Nguyen

Anh

(2012) Extension of equivalent linearization method to design of TMD for linear damped systems. Structural Control and Health Monitoring 19: 565–573.

18.

Polycarpou

Komodromos

(2011) Numerical investigation of potential mitigation measures for poundings of seismically isolated buildings. Earthquakes and Structures 2(1): 1–24.

19.

Polycarpou

Komodromos

(2013) Numerical Investigation of the Effectiveness of Rubber Shock-Absorbers as a Mitigation Measure for Earthquake-Induced Structural Poundings. Dordrecht, The Netherlands: Springer Netherlands.

20.

Tsai

H-C

(1997) Dynamic analysis of base-isolated shear beams bumping against stops. Earthquake Engineering and Structural Dynamics 26: 515–528.

21.

Takewaki

(2011) Preliminary report of the 2011 off the Pacific coast of Tohoku earthquake. Journal of Zhejiang University-SCIENCE A 12(5): 327–334.

22.

Wang

AHC

Deb

(2011) Multi-Objective Evolutionary Optimization for Product Design and Manufacturing. Germany: Springer-Verlag.

23.

Xie

(2019) Experimental Study on Seismic Collapse-Resistance Performance and Failure Mechanism of RC Frame Columns. China: Southeast University.

24.

Zhou

Tan

Cui

, et al. (2018) Recent progress and application on seismic isolation energy dissipation and control for structures in China. Earthquake Engineering and Engineering Vibration 17(1): 19–27.

25.

Zargar

Ryan

Rawlinson

, et al. (2017) Evaluation of a passive gap damper to control displacements in a shaking test of a seismically isolated three‐story frame. Earthquake Engineering and Structural Dynamics 46: 51–71.