Abstract
An experiment with 30 specimens was carried out to investigate the mechanical behaviors of postfire (temperature up to 800°C) grouted sleeve connections under different loading regimes, including uniaxial tensile loading and cyclic loading with a large strain. The load versus displacement curves of postfire grouted sleeve connection specimens included ascending, yielding, hardening and declining segments and could be classified into two kinds of curves according to the shapes of ascending and descending segments. Corresponding to the types of load versus displacement curves, there were two failure patterns, including rebar fracture outside the sleeve and bond-slip failure between the grout and steel rebar. The critical temperatures for causing the failure pattern change and loading bearing ability decline were 400°C and 800°C, respectively. It was found that an influencing factor of 0.178 was used to represent the accumulated damage from cyclic loadings, which formed the theoretical methods for the bearing capacity calculation of postfire connections. In addition, the displacement ratio was proposed to be 6.0 for the postfire grouted sleeve connection under different loadings. All of these findings and analyses are beneficial for the design of grouted sleeve connections after exposure to elevated temperatures.
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References
Xiao JZ, Liu LL, Ding T et al (2020) Experimental study on mechanical behavior of thermally damaged grouted sleeve splice under cyclic loading. Struct Concr 21(6):2494–2514
Ling JH, Rahman ABA, Ibrahim IS (2014) Feasibility study of grouted splice connector under tensile load. Constr Build Mater 50:530–539
Sayadi KA, Rizkalla SH, Leblanc B (1995) Horizontal connections for precast concrete shear walls subjected to cyclic deformations Part 1: mild steel connections. PCI J 41(1):78–96
JGJ 1-2014 (2014) Technical specification for precast concrete structures. China Architecture & Building Press, Beijing. (in Chinese)
JGJ 355-2015 (2015) Technical specification for grout sleeve splicing of rebars. China Architecture & Building Press, Beijing. (in Chinese)
Lu ZW, Huang J, Li YB et al (2019) Mechanical behaviour of grouted sleeve splice under uniaxial tensile loading. Eng Struct 186:421–435
Li XM, Xiao S, Gao RD et al (2021) Effects of grout sleeve defects and their repair on the seismic performance of precast concrete frame structures. Eng Struct 242:112619
Li JB, Wang Y, Lu Z, Li J (2017) Experimental study and numerical simulation of a laminated reinforced concrete shear wall with a vertical seam. Appl Sci 7(6):629
Haber ZB, Saiidi MS, Sanders DH (2015) Behavior and simplified modeling of mechanical reinforcing bar splices. ACI Struct J 112(2):179–188
Lin F, Wu XB (2016) Mechanical performance and stress–strain relationships for grouted splices under tensile and cyclic loadings. Int J Concr Struct Mater 10(4):435–450
Zheng GY, Kuang ZP, Xiao JZ, Pan ZF (2020) Mechanical performance for defective and repaired grouted sleeve connections under uniaxial and cyclic loadings. Constr Build Mater 233:117233
JGJ 107-2016 (2016) Technical specification for mechanical splicing of steel reinforcing bars. China Architecture & Building Press, Beijing. (in Chinese)
Gao Q, Zhao WJ (2022) Experimental study on connection performance of grouted welded sleeve under uniaxial tensile load. J Build Struct 43(4):208–219 ((in Chinese))
Gao Q, Zhao WJ (2022) Experimental study on connection performance of grouted welded sleeve under high stress repeated tension-compression load. J Build Struct 43(4):220–227 ((in Chinese))
Xu CS, Liu HT, Du XL (2018) Experimental study on connection performance of grouted sleeve splicing for rebars under high stress repeated tension-compression loading. J Build Struct 39(12):178–184 ((in Chinese))
Kim HK (2008) Confining effect of mortar-filled steel pipe splice. Architect Res 10(2):27–35
Kim HK (2008) Structural performance of steel pipe splice for SD500 high-strength reinforcing bar under cyclic loading. Architect Res 10(1):13–23
Zhang WX, Lv WL, Zhang JY et al (2019) Post-fire tensile properties of half-grouted sleeve connection under different cooling paths. Fire Saf J 109:102848
Zhang WX, Deng JJ, He C et al (2020) Experiment and analysis on mechanical properties of fully-grouted sleeve connection at elevated temperatures. Constr Build Mater 244:118314
Zhu JN, Ma JF, Guo DD et al (2021) Study on tensile properties of semi grouted sleeve connectors after high temperature. Constr Build Mater 302:124088
Xiao JZ, Liu LL, Ding T, Zhang L (2020) Experimental study on mechanical behaviors of grouted sleeve splices after high temperature. J Build Struct 41(11):99–107 ((in Chinese))
Liu LL, Xiao JZ, Ding T, Zhang L (2021) Mechanical behaviours of heat-damaged grouted sleeve connections. Fire Saf J 122:103345
Zheng YF, Guo ZX, Liu JB, Chen XN, Xiao QD (2016) Performance and confining mechanism of grouted deformed pipe splice under tensile load. Adv Struct Eng 19(1):86–103
Liu LL, Xiao JZ, Ding T (2022) Finite element simulation verification and failure mechanism of grouted sleeve connections under loading. Eng Mech 39(12):117–189 ((in Chinese))
Ling JH, Rahman ABA, Ibrahim IS, Hamid ZA (2012) Behaviour of grouted pipe splice under incremental tensile load. Constr Build Mater 33:90–98
GB 50010-2010 (2015) Code for design of concrete structures, 2015 ed. China Architecture & Building Press, Beijing. (in Chinese)
Yu ZW, Wang ZQ, Shi ZF (2015) Experiment research on material properties of new III grade steel rebar after fire. J Build Struct 26(2):112–116 ((in Chinese))
Acknowledgements
The authors wish to acknowledge the financial support from the Science and Technology Planning Project of Jiangxi Education Department in China (GJJ201010), The Spring Sunshine Program from Ministry of Education of China (HZKY20220392), and the Doctoral Research Startup Project of Jinggangshan University (JZB2208).
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This study is supported by the Science and Technology Planning Project of Jiangxi Education Department in China (GJJ201010), The Spring Sunshine Program from Ministry of Education of China (HZKY20220392), and the Doctoral Research Startup Project of Jinggangshan University (JZB2208).
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Liu, L., Ouyang, L., Ouyang, X. et al. Postfire Mechanical Behaviors of Grouted Sleeve Connections Under Strong Earthquakes. Fire Technol 59, 2829–2852 (2023). https://doi.org/10.1007/s10694-023-01455-y
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DOI: https://doi.org/10.1007/s10694-023-01455-y