Earthquakes and Structures

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Large-scale cyclic test on frame-supported-transfer-slab reinforced concrete structure retrofitted by sector lead rubber dampers

  • Xin Xu (School of Civil Engineering, Guangzhou University) ;
  • Yun Zhou (School of Civil Engineering, Guangzhou University) ;
  • Zhang Yan Chen (School of Civil Engineering, Guangzhou University) ;
  • Da yang Wang (School of Civil Engineering, Guangzhou University) ;
  • Ke Jiang (Department of Civil and Natural Resources Engineering, University of Canterbury) ;
  • Song Wang (School of Civil Engineering, Guangzhou University)
  • Received : 2024.03.10
  • Accepted : 2024.03.27
  • Published : 2024.05.25
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Abstract

For a conventionally repaired frame-supported-transfer-slab (FSTS) reinforced concrete (RC) structure, both the transfer slab and the beam-to-column and transfer slab-to-column joints remain vulnerable to secondary earthquakes. Aimed at improving the seismic performance of a damaged FSTS RC structure, an innovative retrofitting scheme is proposed, which adopts the sector lead rubber dampers (SLRDs) at joints after the damaged FSTS RC structure is repaired by conventional approaches. In this paper, a series of quasi-static cyclic tests was conducted on a large-scale retrofitted FSTS RC structure. The seismic performance was evaluated and the key test results, including deformation characteristics, damage pattern, hysteretic behaviour, bearing capacity and strains on key components, were reported in detail. The test results indicated that the SLRDs started to dissipate energy under the service level earthquake, and thus prevented damages on the beam-to-column and transfer slab-to-column joints during the secondary earthquakes and shifted the plastic hinges away from the beam ends. The retrofitting scheme of using SLRDs also achieved the seismic design concept of 'strong joint, weak component'. The FSTS RC structure retrofitted by the SLRDs could recover more than 85% bearing capacity of its undamaged counterpart. The hysteresis curves were featured by the inverse "S" shape, indicating good bearing capacity and hysteresis performance. The deformation capacity of the damaged FSTS RC structure retrofitted by the SLRDs met the corresponding codified requirements for the case of the maximum considered earthquake, as set out in the Chinese seismic design code. The stability of the FSTS RC structure retrofitted by the SLRDs, which was revealed by the developed stains of the RC frame and transfer slab, was improved compared with the undamaged FSTS RC structure.

Keywords

Acknowledgement

The authors would like to acknowledge the financial support provided by the National Natural Science Foundation of China (grant number 52178466 and grant number 52378498), the Basic Innovation Program for graduate students of Guangzhou University (grant number 2017GDJC-D19) and the Postdoctoral Fellowship Program of CPSF (grant number GZC20230591). Also, a special appreciation goes to Heng Shui Zhen Tai Isolation Equipment Co., Ltd. for their support in the fabrication of the sector lead rubber dampers.

References

  1. Castaldo, P. and Miceli, E. (2023), "Optimal single concave sliding device properties for isolated multi-span continuous deck bridges depending on the ground motion characteristics", Soil Dyn. Earthq. Eng., 173, 108128. https://doi.org/10.1016/j.soildyn.2023.108128.
  2. Choi, S.H., Lee, D.H., Oh, J.Y., Kim, K.S., Lee, J.Y. and Shin, M. (2014), "Unified equivalent frame method for flat plate slab structures under combined gravity and lateral loads - Part 1: Derivation", Earthq. Struct., 7(5), 719-733. https://doi.org/10.12989/eas.2014.7.5.719.
  3. GB 50011-2010 (2016), Code for Seismic Design of Buildings, Chinese Ministry of Housing and Urban Rural Development, Beijing, China.
  4. GB50367-2013 (2013), Code for Design of Strengthening Concrete Structure, China Architectural and Building Press, Beijing, China.
  5. Giannakouras, P. and Zeris, C. (2019), "Seismic performance of irregular RC frames designed according to the DDBD approach", Eng. Struct., 182, 427-445. https://doi.org/10.1016/j.engstruct.2018.12.058.
  6. Gino, G., Miceli, E. and Castaldo, P. (2024), "Strain-based method for assessment of global resistance safety factors for NLNAs of reinforced concrete structures", Eng. Struct., 304, 117625. https://doi.org/10.1016/j.engstruct.2024.117625.
  7. Javadi, P. and Yamakawa, T. (2019), "Strength and ductility type retrofit of soft-first-story RC frames through the steel-jacketed non-reinforced thick hybrid wall", Eng. Struct., 186, 255-269. https://doi.org/10.1016/j.engstruct.2019.02.013.
  8. JGJ/T101-2015 (2015), Specification for Seismic Test of Building, Chinese Ministry of Housing and Urban Rural Development, Beijing, China.
  9. JGJ297-2013 (2013), Technical specification for seismic energy dissipation of buildings, Chinese Ministry of Housing and Urban Rural Development, Beijing, China.
  10. Kang, S.M., Na, S.J. and Hwang, H.J. (2021), "Two-way shear strength of reinforced concrete transfer slab-column connections", Eng. Struct., 231, 111693. https://doi.org/10.1016/j.engstruct.2020.111693.
  11. Kang, S.M., Na, S.J. and Hwang, H.J. (2022), "Punching shear strength of reinforced concrete transfer slab-column connections with shear reinforcement", J. Build. Eng., 243, 112610. https://doi.org/10.1016/j.engstruct.2021.112610.
  12. Kang, S.M., Na, S.J., Hwang, H.J. and Kim, S.I. (2022), "Punching shear strength improved by upward panel in reinforced concrete transfer slabs", J. Build. Eng., 46, 103753. https://doi.org/10.1016/j.jobe.2021.103753.
  13. Lee, H.S. and Ko, D.W. (2007), "Seismic response characteristics of high-rise RC wall buildings having different irregularities in lower stories", Eng. Struct., 29(11), 3149-3167. https://doi.org/10.1016/j.engstruct.2007.02.014.
  14. Li, J.H., Su, R.K.L. and Chandler, A.M. (2003), "Assessment of low-rise building with transfer beam under seismic forces", Eng. Struct., 25(12), 1537-1549. https://doi.org/10.1016/S0141-0296(03)00121-4.
  15. Li, S., Paula, I.J. and Mao, L. (2023), "Seismic response control of irregular asymmetric structure with voided slabs by distributed tuned rotary mass damper devices", Earthq. Struct., 25(6), 455-467. https://doi.org/10.12989/eas.2023.25.6.455.
  16. Mazza, F., Mazza, M. and Vulcano, A. (2018), "Base-isolation systems for the seismic retrofitting of rc framed buildings with soft-storey subjected to near-fault earthquakes", Soil Dyn. Earthq. Eng., 109, 209-221. https://doi.org/10.1016/j.soildyn.2018.02.025.
  17. Miceli, E. and Castaldo, P. (2023), "Robustness improvements for 2D reinforced concrete moment resisting frames: Parametric study by means of NLFE analyses", Struct. Concrete, 25, 9-31. https://doi.org/10.1002/suco.202300443.
  18. Mouhine, M. and Hilali, E. (2022), "Seismic vulnerability assessment of RC buildings with setback irregularity", Ain Shams Eng. J., 13(1), 101486. https://doi.org/10.1016/j.asej.2021.05.001.
  19. Nassiraei, H. and Rezadoost, P. (2021), "Static capacity of tubular X-joints reinforced with fiber reinforced polymer subjected to compressive load", Eng. Struct., 236, 112041. https://doi.org/10.1016/j.engstruct.2021.112041.
  20. T/CECS547-2018 (2018), Technical Specification for Seismic Energy Dissipation of Strengthening Structure, China Architectural and Building Press, Beijing, China.
  21. Turchetti, F., Tubaldi, E., Patelli, E., Castaldo, P. and Malaga-Chuquitaype, C. (2023), "Damage modelling of a bridge pier subjected to multiple earthquakes: A comparative study", Bull. Earthq. Eng., 21(9), 4541-4564. https://doi.org/10.1007/s10518-023-01678-y.
  22. Turker, K. and Gungor, I. (2018), "Seismic performance of low and medium-rise RC buildings with wide-beam and ribbed-slab", Earthq. Struct., 15(4), 383-393. https://doi.org/10.12989/eas.2018.15.4.383.
  23. Wang, W., Chen, Y., Dong, B. and Leon, R.T. (2011), "Experimental behavior of transfer story connections for highrise SRC structures under seismic loading", Earthq. Eng. Struct. Dyn., 40(9), 961-975. https://doi.org/10.1002/eqe.1067.
  24. Xia, Y., Li, W., Liu, W., Liu, Y., Xu, X. and Zhang, C. (2022), "Experimental study of frame-supported shear wall structure of high-rise buildings with transfer slab in metro depot", Build., 12(11), 1940. https://doi.org/10.3390/buildings12111940.
  25. Xu, X. (2012), "Performance and application research on sector lead viscoelastic dampers", Ph.D. Dissertation, Guang Zhou University, Guang Zhou, China.
  26. Xu, X., Zeng, Q.L. and Wei, L. (2017), "Discussion about second-order effects of gravity loading in high-rise building", Build. Struct., 47(3), 36-39. https://doi.org/10.19701/j.jzjg.2017.03.007.
  27. Xu, X., Zhou, Y., Chen, Z.Y., Wang, S. and Jiang, K. (2024), "Experimental and numerical investigation on the seismic behavior of the sector lead rubber damper", Earthq. Struct., 26(3), 203-218. https://doi.org/10.12989/eas.2024.26.3.203.
  28. Zhou, F. (2021), "Seismic performance analysis of subway high-rise structure with thick plate transfer", Ph.D. Dissertation, Guang Zhou University, Guang Zhou, China.
  29. Zhou, X. and Xu, Y.L. (2007), "Multi-hazard performance assessment of a transfer-plate high-rise building", Earth Eng. Eng. Vib., 6(4), 371-382. https://doi.org/10.1007/s11803-007-0780-9.