Numerical Study on Minimum Shear Connection Ratio of Tie-Bars in Steel Plate–Concrete Composite Beams Subjected to Out-of-Plane Cyclic Loading

Bing Lu,Cong Liu,Cuihua Li,Lanhui Guo

doi:10.3390/app12041820

Abstract

The failure modes of tie-bars under monotonic loading and cyclic loading are ductility and brittleness, respectively. They can significantly affect the design for tie-bars in a steel plate–concrete (SC) composite structure. A 3D finite element model of a SC composite beam was developed and verified through a quasi-static test. Two rules on the interfacial shear distribution were deduced and verified. Then, a total of 188 finite element models were developed to investigate the minimum shear connection ratio of tie-bars in SC composite beams, which can ensure the sufficient energy dissipation capacity of a SC composite beam under out-of-plane cyclic loading. The influences of the shear connection ratio, shear span versus depth ratio, stiffness, and number of tie-bars on the seismic behavior of a SC composite beam were investigated. Finally, a design method for tie-bars in the SC composite beam under out-of-plane cyclic loading was proposed.

Highlights

In a steel–concrete composite structure, the interfacial shear distribution of ductile shear connectors, for example, studs, was usually assumed to be uniform between the maximum bending moment and zero bending moment for the sake of convenience in construction [1,2,3]
Wright et al [5,6] carried out an experimental study on the flexural behavior of steel plate–concrete (SC) composite beams with long studs and short studs; the experimental results indicated that when the γ is close to 2, the flexural capacities of SC composite beams can reach the theoretical value at the state of yield of the tensile steel plate
The experimental results indicated that the interfacial shear distribution can be affected by the shear connection ratio, and the added studs did not significantly improve the ductility and energy dissipation capacity of the SC composite beams under out-of-plane cyclic loading

Summary

Introduction

In a steel–concrete composite structure, the interfacial shear distribution of ductile shear connectors, for example, studs, was usually assumed to be uniform between the maximum bending moment and zero bending moment for the sake of convenience in construction [1,2,3]. The experimental results indicated that the interfacial slip of studs could significantly affect the flexural behavior of the SC composite beam under outof-plane cyclic loading. The experimental results indicated that the interfacial shear distribution can be affected by the shear connection ratio, and the added studs did not significantly improve the ductility and energy dissipation capacity of the SC composite beams under out-of-plane cyclic loading. Sci. 2022, 12, 1820 not significantly improve the ductility and energy dissipation capacity of the SC composite beams under out-of-plane cyclic loading It indicated that the design method of shear connectors based on the shear connection ratio can be imperfect for the SC composite beam. Nootfes:tfeceul ipslatthe,efuc,soins cthreetuelticmuabtee tceonsmilepsrteresnsgivtheosftsrteenelgptlha,tet,sdisstudthisethtehdiciakmneetsesr ooffstsutedes,lfup,sltuadteis, tfhye,s uisltitmhaeteyield tentuselintlisemilsaettserterteennngsgtitlhhe sootffresstnutgedtehsl, odpftiletaiiets-ebt,haferu. ,ds iiasmtehteeruolfttiime-baatres,tefyn,tiesiilsethsetryeienlgdtthenosiflestsetreelnpgtlhatoef,tides-tbudari,santhdefud,tiieaismtheeter of studs, fu,stud is the ultimate tensile strength of studs, dtie is the diameter of tie-bars, fy,tie is the yield tensile strength of tie-bar, and fu,tie is the ultimate tensile strength of tie-bar

Model Overview

Out-of-Plane Flexural Behavior of SC Composite Beams with Different Shear

The Minimum Shear Connection Ratio

Parameter Analysis