Shear behavior of composite girders of zigzag web.

The purpose of this paper is to investigate the behavior of shear composite girders (flat & zigzag webs). The experimental work involves testing six composite girders to investigate the influence of web height and the effect of using a zigzag web under shear loading. Three web heights (400, 600, and 800 mm) were considered for all specimens. The steel girders were 1800 mm overall length, and the composite concrete slab were 460 mm, and150 mm width and depth, respectively. The resulted are showing in from where of a recorded load of capacity, mid-span deflection, and crack pattern for the girders of composite, and the slip between the deck of concrete and steel girder. Increasing the web height resulted in reduce the vertical deflection, slip, and the cracks were limited at the loading zone. The curves of the load-displacement and stress distribution predicted by the FEM agree well with those obtained from experiments, proving the accuracy of the suggested FEM. [ABSTRACT FROM AUTHOR]