Experimental evaluation on seismic performance of sandwich box columns

Abstract

SUMMARYThis paper presents experimental information on the behaviour of sandwich box columns subjected to combined bending and axial loading. The sandwich box columns consisted of double thin-walled steel tubes with concrete between them. Owing to the interaction between steel and concrete, the composite members performed in a ductile manner during testing. Test results show that high strength/mass ratio characteristics were maintained, and the goal of obtaining signi"cant member ductility was also achieved. The contribution of concrete to member performance was found to be more signi"cant for members with higher steel width/thickness ratios.

Improving seismic performance of concrete-filled tube to base connections

“…(5) It can be observed from Fig. 7 that significant improvement was achieved whenever the strengthening stiffeners were presented.…”

“…The significant seismic performance of such designs can be guaranteed only when adequate design details are employed. Current studies on the behavior of CFT designs under earthquake excitation are focused primarily on the response of CFT members under axial load, bending or a combination [4][5][6][7]. Information on the CFT column to base design details and the influence of the connection effectiveness upon the structural performance is still limited.…”

Design and key construction technology of steel-concrete-steel sandwich composite pylon for a large span cable-stayed bridge

“…The results show that the strong performance of the sandwich members is higher than their corresponding concrete-filled tubes member. The improvement in strength reached up to 45 per cent for sandwich sections with non-compact outer tubes 3 . The upper pylon column of Stonecutters Bridge adopts a steel-concrete composite structure.…”

Design and Key Construction Technology of Steel-Concrete-Steel Sandwich Composite Pylon for a Large Span Cable-stayed Bridge

“…The improvement in strength reached up to 45 per cent for sandwich sections with non-compact outer tubes [2] . The upper tower column of Stonecutters Bridge adopts a steel-concrete composite structure.…”