Relative influences of cracking and connection yield on transverse distributions of moments and reactions in timber-concrete composites

• Multi-joist timber-concrete composites of various connection layouts were tested to failure. Both moment and reaction sharing inferred across the full loading range. Cracking transformed support by a factor up 1.60. Connection yield bending 1.62. Nonlinear FE models reliably predict load response help elucidate TCC mechanics. This paper uses tests backed nonlinear analysis for parametric study transverse in large-scale composite (TCC) specimens, each comprising multiple hardwood LVL joists fastened single concrete slab via bonded-in, ductile steel mesh connectors. The first time compares midspan with range behaviour failure two distinct layouts, it highlights relative influences connector cracking on characteristics. For specific examples this study, results show that while had little effect distribution moments, did change reactions Conversely, distribution, but changed moments Further, test-verified analyses revealed an inadvertent 20% drop tensile strength observed exacerbated 12.5%. These numbers approach or exceed safety factors used design. Wider studies are needed determine practical bounds these effects develop user-friendly means allowing