Experimental Investigation on Double skin Steel concrete Composite Pylon

Abstract:

Five specimens with perforated ribs and five specimens with studs were constructed to observe the experimental behaviour of double skin steel concrete composite pylon under axial load and combined constant axial load with cyclic lateral load respectively. Results of the test demonstrate the ultimate capacity and failure mode of two types of specimens with different connectors. Both perforated ribs and studs can limit the buckling wavelength of plate and to a certain extent influence the detail of failure modes. As a major influence factor, axial load level divides failure modes into two types, compression failure and tension failure. Furthermore, specimens under cyclic load show poor performance when there is high axial load or no axial load at all. At last, comparison on the bearing capacity is made between the results from experiments and calculations according to the codes, which is based on rigid plastic principle.

Key words:composite pylon; double skin; perforated ribs; studs; cyclic loads; failure mode; bearing capacity