Shear performance of a novel demountable connector for reusable steel-concrete composite structures

J. He, A. S. H. Suwaed, G. Vasdravellis, S. Wang

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

A novel demountable shear connector is proposed to link a concrete slab to steel sections in a way that resulting steel-concrete composite floor is demountable, i.e. it can be easily dismantled at the end of its service life. The proposed connectors consist of two parts: the first part is a hollow steel tube with internal threads at its lower end. The second part is a compatible partially threaded bolted stud. After linking the stud to the steel section, the hollow steel tube can be fastened over the threaded stud, which create a complete demountable shear connector. The connector is suitable for use in both composite bridges and buildings, and using cast in-situ slabs, precast solid slabs, or hollow-core precast slabs. A series of push-off tests with different parameters including wall thickness of steel tube, compressive strength of concrete slab and infilled grout were carried out to study shear strength, shear stiffness, failure modes and relative slip characteristics of demountable shear connectors. Experimental results indicated that the shear connector has a high strength and initial stiffness, also the slip capacity that is higher than the requirements of the current codes of practice. Finally, it is suggested that under applied loading, concrete slabs do not crack or crush, demountable connectors can yield into plastic state, therefore, concrete slabs and steel beams can be easily replaced, repaired or reused.

Original languageEnglish
Title of host publicationLife-Cycle Civil Engineering
Subtitle of host publicationInnovation, Theory and Practice
EditorsAirong Chen, Xin Ruan, Dan M. Frangopol
PublisherCRC Press
Pages775-781
Number of pages7
ISBN (Electronic)9780429343292
ISBN (Print)9780367360191
DOIs
Publication statusPublished - 2020
Event7th International Symposium on Life-Cycle Civil Engineering 2020 - Shanghai, China
Duration: 27 Oct 202030 Oct 2020

Conference

Conference7th International Symposium on Life-Cycle Civil Engineering 2020
Abbreviated titleIALCCE 2020
Country/TerritoryChina
CityShanghai
Period27/10/2030/10/20

ASJC Scopus subject areas

  • Computational Mechanics
  • Civil and Structural Engineering

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