Key Design Parameters Analysis and Calculation Theory Research on Bending Performance of Steel–UHPC Lightweight Composite Deck Structure

This paper aims to study the influence of key design parameters (e.g., reinforcement ratio, cover thickness, stud spacing, and thickness ultra-high-performance concrete (UHPC) layer) on longitudinal transverse bending performance, as well cracking load ultimate bearing capacity calculation theory steel–UHPC lightweight composite deck (LWCD) structure. Four tests four plates beams were conducted, respectively. The refined finite element models components with different based ABAQUS established. influences flexural behaviors load-mid-span displacement curve, stress, stiffness, elastic limit load, critical slip ductility) compared analyzed in detail. can be improved by increasing UHPC layer ratio reinforcement, reducing spacing studs. According characteristics structure, formulas for beam are proposed, calculated values good agreement test results (the errors basically within 10%), which is convenient practical engineering applications.