Flexural Response of Steel‐Concrete Composite Truss Beams

Abstract

This paper presents an experimental and analytical study on the flexural response of a steel-concrete composite truss beam. This integrated unit consists of a triangular steel truss, a concrete slab on it, and stud connectors. Three simply supported composite trusses with different configurations of shear connection (η) were evaluated via three-point bending tests. The effects of the shear connectors’ configuration on the flexural response (i.e., load-deflection, load-slippage, and load-strain curves) of the composite trusses were examined. The commercial finite-element (FE) software ANSYS was employed to conduct numerical simulations. An FE model was developed for the composite truss and was validated using experimental results. A parametric study was performed to investigate the effect of the shear connectors’ configuration on the flexural response of the composite trusses. If η < 1, the bending capacity increased with η. In contrast, if η ≥ 1, the effect of η on the bending capacity was negligible. Finally, a design method based on the degree of the shear connection was proposed to predict the ultimate capacity of the composite truss, and the predictions agreed well with the experimental results.

Static Behavior of a Modified Through‐Core Connection between CFST Column and Composite Beam

“…To better obtain the working mechanism of the modified through-core connections, finite element models of the tested specimens were established using ABAQUS [16]. Following its validation with the experimental results, the internal stress stage and cooperative working mechanism during the loading process were discussed, and then a parametric study was performed using varying critical parameters in Section 4.…”

Numerical Simulation of Mesodamage Behavior of Concrete Based on Material Point Method

“…Since the mesoscale study of concrete mechanical behaviors can obtain a more fundamental understanding of concrete damage and failure mechanisms and provide a deep insight into macroscopic mechanical behaviors, it has become a hot research area of concrete material and achieved fruitful results. Up to date, the finite element method (FEM), which helps many researchers to simulate the effects of multiphase distribution on the mechanical response and damage properties of concrete [5][6][7][8][9][10][11][12][13][14][15][16][17][18], is still being a dominant method to model different behaviors of concrete at macro-and mesoscales. However, with the development of computing technology and numerical methods, more and more approaches are being employed to explain the damage mechanism of concrete structure [19][20][21][22][23][24][25].…”