Experimental study on the load-carrying capacity of steel-mesh-reinforced rubber bearings under axial compression

Abstract

Isolation bearings play an important role in the seismic resilience of highway bridges. Flexible and high-strength reinforcement has been applied in elastomeric isolation bearings to substitute conventional rigid steel plate reinforcement to enhance their lateral performance, for example, Iower lateral stiffness and larger deformability. However, the main literature shows that existing flexible reinforcement, such as carbon/glass fiber fabric, may not guarantee a sufficient vertical load-carrying capacity of elastomeric bearings to meet the design requirement of 30 MPa considering the vertical seismic effect. To this end, the emerging high-strength steel woven wire mesh was introduced as an alternative flexible reinforcement for the bearings in this study to increase their ultimate compression capacity while maintaining superior lateral performance. Vertical compression tests were conducted on 34 specimens of the proposed unbonded steel-mesh-reinforced bearings (USRBs) to investigate the ultimate compression capacity. In addition to the general ultimate behavior of USRBs under vertical loading, the influence of various design parameters (i.e., individual rubber layer thickness, number of reinforcement layers, bearing design load) was investigated through comparisons among the specimens. From the test results, the compressive failure mechanism of USRBs was unveiled, which originated from the tensile failure of the steel mesh reinforcement. The steel mesh reinforcement was proved to increase the bearing ultimate compression capacity to an average of 52.0 MPa compared to fiber-reinforced bearings, with 85% of specimens exceeding 30 MPa. Moreover, the compression capacity of USRBs was identified to be significantly affected by the individual rubber layer thickness. Specific discussions were further provided concerning the influence of potential manufacturing defects. Finally, suggestions were provided to further enhance the ultimate compression capacity of USRBs based on the results and discussions.

Keywords

compression test / failure mechanism / seismic isolation / steel-mesh-reinforced rubber bearing / ultimate compression capacity

References

[1] KellyJM. Analysis of fiber-reinforced elastomeric isolators. J Seismol Earthq Eng. 1999;2(1):19-34.

[2] KellyJM, Takhirov SM. Analytical and Experimental Study of Fiber-Reinforced Elastomeric Isolators. Rep No PEER 2001/11, Pacific Earthq Eng Res Center. Univ California;2001(September).

[3] KonstantinidisD. Two low-cost seismic isolation systems. 15th World Conf Earthq Eng. 2012:24-28.

[4] RussoG, Pauletta M. Sliding instability of fiber-reinforced elastomeric isolators in unbonded applications. Eng Struct. 2013;48:70-80.

[5] Van EngelenNC, Osgooei PM, TaitMJ, KonstantinidisD. Partially bonded fiber-reinforced elastomeric isolators (PB-FREIs): Partially bonded fiber-reinforced elastomeric isolators (PB-FREIS). Struct Health Monit. 2015;22(3):417-432.

[6] CalabreseA, SerinoG, StranoS, Terzo M. Experimental investigation of a low-cost elastomeric anti-seismic device using recycled rubber. Meccanica. 2015;50(9):2201-2218.

[7] DasA, DebSK, DuttaA. Comparison of numerical and experimental seismic responses of FREI-supported un-reinforced brick masonry model building. J Earthq Eng. 2016;20(8):1239-1262.

[8] Van EngelenNC, TaitMJ, KonstantinidisD. Development of design code oriented formulas for elastomeric bearings including bulk compressibility and reinforcement extensibility. J Eng Mech. 2016;142(6):1-15.

[9] EhsaniB, Toopchi-Nezhad H. Systematic design of unbonded fiber reinforced elastomeric isolators. Eng Struct. 2017;132:383-398.

[10] Maghsoudi-BarmiA, Khaloo A. Experimental investigation of life-time performance of unbounded natural rubber bearings as an isolation system in bridges. Struct Infrastruct Eng. 2020;17(8):1-14.

[11] OsgooeiPM, TaitMJ, KonstantinidisD. Three-dimensional finite element analysis of circular fiber-reinforced elastomeric bearings under compression. Compos Struct. 2014;108(1):191-204.

[12] Al-AnanyYM, TaitMJ. Fiber-reinforced elastomeric isolators for the seismic isolation of bridges. Compos Struct. 2017;160:300-311.

[13] KellyJM. Seismic isolation systems for developing countries. Earthquake Spectra. 2002;18(3):385-406.

[14] OsgooeiPM, Konstantinidis D, TaitMJ. Variation of the vertical stiffness of strip-shaped fiber-reinforced elastomeric isolators under lateral loading. Compos Struct. 2016;144:177-184.

[15] Al-AnanyYM, TaitMJ. A numerical study on the compressive and rotational behavior of fiber reinforced elastomeric isolators (FREI). Compos Struct. 2015;133:1249-1266.

[16] ToopchinezhadH. The Performance of SU-FREIs (Stable Unbonded -Fiber Reinforced Elastomeric Isolators). Published online 2008:182.

[17] LosannoD, Madera Sierra IE, SpizzuocoM, MarulandaJ, Thomson P. Experimental assessment and analytical modeling of novel fiber-reinforced isolators in unbounded configuration. Compos Struct. 2019;212:66-82.

[18] Hedayati DezfuliF, Alam MS. Performance of carbon fiber-reinforced elastomeric isolators manufactured in a simplified process: experimental investigations. Struct Control Health Monit. 2014;21(11):1347-1359.

[19] MoonBY, KangGJ, KangBS, Kelly JM. Design and manufacturing of fiber-reinforced elastomeric isolator for seismic isolation. J Mater Process Technol. 2002;130-131:145-150.

[20] PengT, LiJ, FanL. Pilot study on the horizontal shear behaviour of Frp rubber. In: ST Smith, ed, Asia-Pacific Conference on FRP in Structures, 2007:443-450.

[21] PinarbasiS, AkyuzU, MengiY Effect of Reinforcement Flexibility on Compressive Behavior of Strip-Shaped Elastomeric Bearings. 2008;(September):15-17.

[22] Toopchi-NezhadH, TaitMJ, DrysdaleRG. A novel elastomeric base isolation system for seismic mitigation of low-rise buildings. 14th World Conf Earthq Eng. 2008:12-17.

[23] MordiniA, Strauss A. An innovative earthquake isolation system using fibre-reinforced rubber bearings. Eng Struct. 2008;30(10):2739-2751.

[24] LiuWG, HeWF, FengDM, Yang QR. Vertical stiffness and deformation analysis models of rubber isolators in compression and compression-shear states. J Eng Mech. 2009;135(9):945-952.

[25] Toopchi-NezhadH, TaitMJ, DrysdaleRG. Bonded versus unbonded strip fiber reinforced elastomeric isolators: finite element analysis. Compos Struct. 2011;93(2):850-859.

[26] ZhouL, AlamMS, DongY, Feng R. Seismic resilience assessment of extended pile shaft supported coastal bridges considering scour and uniform corrosion effects. Eng Struct. 2024;304:117643.

[27] Korean Standards Association. Steel-Laminated Elastomeric Bearings for Bridge.Pdf;1998.

[28] Ministry of Transport of the People’s Republic of China. Plate Type Elastomeric Pad Bearings for Highway Bridges;2004.

[29] ISO. Elastomeric Seismic-Protection Isolators —Part 1: Test Methods;2005.

[30] European Committee for Standardization. Structural Bearings -Part 3: Elastomeric Bearings;2005.

[31] Standardization Administration of China. Rubber Bearings -Part 2: Elastomeric Seismic-Protection Isolators for Bridges;2006.

[32] AASHTO. AASHTO LRFD Bridge Design Specifications;2010. https://medium.com/@arifwicaksanaa/pengertian-use-case-a7e576e1b6bf

[33] Ministry of Transport of the People’s Republic of China. Lead Rubber Bearing Isolator for Highway Bridge;2011.

[34] Japan Road Association. Specifications for Highway Bridges Part 1: Common;2012.

[35] Ministry of Transport of the People’s Republic of China. High Damping Seismic Isolation Rubber Bearings for Highway Bridges;2012.

[36] Canadian Standard Association (CSA). Canadian Highway Bridge Design Code (CHBDC) CAN/CSA-S6-19;2019.

[37] Ministry of Transport of the People’s Republic of China. Specifications for Seismic Design of Highway Bridges;2020.

[38] RiyadhMM, OsmanSS, AlamMS. Experimental investigation of novel carbon-fiber reinforced elastomeric isolators with polyurethane cores under vertical and lateral loading. Eng Struct. 2023;275(PA):115186.

[39] TsaiHC, KellyJM. Stiffness Analysis of Fiber-Reinforced Elastomeric Isolators. Rep No PEER 2001/05, Pacific Earthq Eng Res Center. Univ California. Published online 2001.

[40] Castillo RuanoP, Strauss A. An experimental study on unbonded circular fiber reinforced elastomeric bearings. Eng Struct. 2018;177:72-84.

[41] KangKJ. Wire-woven cellular metals: the present and future. Prog Mater Sci. 2015;69:213-307.

[42] LiH, TianS, DangX, Yuan W, WeiK. Performance of steel mesh reinforced elastomeric isolation bearing: experimental study. Constr Build Mater. 2016;121:60-68.

[43] LiH. Theoretical and Experimental Study on the High-Performance Seismic Isolation Technology for Short-to-Medium Span Bridges. Tongji University;2022.

[44] TimofeevaA, Avdeenko T, RazumnikovaO. A merging method to discretizing and grouping the input factors of ANOVA model while research of time dynamic of the students intelligence quotient. CEUR Workshop Proc. 2020;2861:370-378.

[45] UyanahDA. The effect of categorizing a continuous independent variable on explained variance. Int J Multidiscip Res Anal. 2022;05(05):482-487.

[46] IBMCorp. IBM SPSS statistics for windows. Published online 2019. https://www.ibm.com/docs/en/SSLVMB_28.0.0/pdf/IBM_SPSS_Statistics_Brief_Guide.pdf

[47] LiH, AlamMS. Exploring key factors affecting the ultimate compression capacity of unbonded steel-mesh-reinforced rubber bearings. Eng Struct. 2024;306(January):117813.

[48] LiH, TianS, DangX. Analytical solution for the ultimate compression capacity of unbonded steel-mesh-reinforced rubber bearings. Buildings. 2024;14(3):839.

[49] Montgomery DCASU. Design and Analysis of Experiments: Ninth Edition;2017. www.wiley.com/go/permissions.%0Ahttps://lccn.loc.gov/2017002355

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2024 The Author(s). Enrthquake Englncering and Retilience published by Tianjlin University and John Wiley & Sons Australia, Ltd.