Behaviour and Design of Steel-Concrete-Steel-Sandwich Construction

Abstract

Static and fatigue tests have been conducted on Bi-Steel steel-concrete-steel sandwich beams. A truss mo with tapering web compression members is proposed for calculating the forces within the beams. The model gi conservative predictions of the failure loads and modes of the beams. A deflection equation has been developed taking account the slip between steel plates and concrete, giving good agreement with measured values. A fatigue life calcula method has been proposed which takes into account interaction of the applied forces at bar-plate connections and gi conservative predictions of fatigue life.

Developments in sandwich construction

“…Finite element analysis [7] confirms the above equation when s x / h c ≤ 1 and shows that it is conservative when s x / h c > 1. When s x / h c = 2, F B /F B1 = 1.5 (Fig.…”

“…Deflection [18,7] The effect of slip on deflection has been studied by Wright and Oduyemi [6]. Noting that the slip at the compression plate of the test beams is negligible, Wright's equations were modified accordingly [7].…”

“…[15,7] Eighteen beams, having the same nominal dimensions as the statically tested beams, were tested under cyclic loading. The Amsler pulsator operated at 4 Hz, 24 h per day.…”

“…Using Eqs. (4) and (5) and the SN equations for the three force components the percentage of the static failure load for each beam that would enable the beam to survive 10 7 cycles was found to range between 8% and 15% [15,7].…”

“…Three-dimensional FE analyses have been used to clarify local behaviour [8,12]. Two-dimensional FE analyses have clarified the overall beam behaviour and have been used for parametric studies on component forces and on uniform loading [7]. 4.…”