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Author:

Wang, Longlong (Wang, Longlong.) | Song, Yanchen (Song, Yanchen.) | Han, Qiang (Han, Qiang.) (Scholars:韩强) | Wang, Zeyu (Wang, Zeyu.)

Indexed by:

EI Scopus SCIE

Abstract:

This paper presents an experimental program designed to investigate strain rate effects on the bond behavior of grouted splice sleeves connected with deformed steel bars. Thirty-six grouted splice sleeve specimens with different anchorage lengths were designed and tested under direct dynamic tensile loads with four loading strain rates (10-3, 10-1, 10 degrees and 10+1 s-1). Strain gauges were employed to record the strain of the sleeve and rebar. The failure modes and the dynamic bond-slip relationships of specimens were obtained. The results show that the bond force capacity increases with an increase in the strain rate. However, the failure mode shifts from the steel bar fracture towards steel bar pullout as the strain rate increases. The mechanisms of a dynamic load transmission are described based on the experimental results. A dynamic analytical procedure incorporating the strain rate effects was developed to predict the bond force-slip relationships and was validated by comparing the experimental bond force-slip curves. The shifting of failure modes was attributed to the damage aggravation effects of the grouted mortar, which led to a reduced effective anchorage length and a steel bar pullout failure mode at high strain rates. In addition, based on the proposed analytical model, the required anchorage length of grouted splice sleeves at different strain rates was calculated and an empirical model was developed to deter-mine the critical embedment length to facilitate engineering design.

Keyword:

Bond performance Failure mode Grouted splice sleeve Critical embedment length Dynamic tensile test

Author Community:

  • [ 1 ] [Wang, Longlong]Beijing Univ Technol, Key Lab Urban Secur & Disaster Engn, Minist Educ, Beijing, Peoples R China
  • [ 2 ] [Song, Yanchen]Beijing Univ Technol, Key Lab Urban Secur & Disaster Engn, Minist Educ, Beijing, Peoples R China
  • [ 3 ] [Han, Qiang]Beijing Univ Technol, Key Lab Urban Secur & Disaster Engn, Minist Educ, Beijing, Peoples R China
  • [ 4 ] [Wang, Zeyu]Georgia Inst Technol, Sch Civil & Environm Engn, Atlanta, GA USA

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Source :

JOURNAL OF BUILDING ENGINEERING

Year: 2023

Volume: 66

6 . 4 0 0

JCR@2022

Cited Count:

WoS CC Cited Count:

SCOPUS Cited Count:

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 2

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