2014•Journal of the China Railway SocietyRequires access
Research on Influence of Loading Methods on Compressive Behavior of Reactive Powder Concrete Filled Steel Tube Stub Columns under Axial Loads
Hu Luo
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Abstract
The Reactive Powder Concrete(RPC)-filled steel tubes can decrease the sizes of cross sections of frame members owing to the ultra-high strength of RPC and can economize the dead load of structure.The RPC-filled steel tubular structures have broad prospects in high-rise commercial buildings and bridges.In this paper,two different loading methods of the RPC-filled steel tubular structure used in real engineering projects were presented,which were the full-section loading and core-concrete loading.Experimental research on influence of different loading methods to behaviors of RPC-filled steel tube stub columns subjected to axial loads was carried out.Analyses results indicate that,when the specimens are subjected to full-section loading and coreconcrete loading respectively,the stress developing processes are different the stresses of steel and the ultimate load carrying capacities are similar in the limit loading state and the hooping effect and stiffness are different to some extent.The failure mechanism and load-displacement curves of RPC-filled steel tube stub columns under two types of axial loading were analyzed.