Experimental Research on the Mechanical Properties of Double-Limb Cold-Framed C-Shaped Steel Hanger Systems

In order to study the feasibility of applying cold-formed thin-walled members in the hanger system of tall industrial plants， a double-limb cold-formed C-shaped steel hanger system was proposed. Considering different spans of the hanger beams， design load values， and the number of connecting batten plates between the webs of the C-sections， static load tests were conducted on six full-scale double-limb cold-formed C-shaped steel hanger system models to investigate their deformation patterns and mechanical properties under the design uniformly distributed loads and the successive concentrated loads. The test results indicated that all hanger system models met the bearing capacity requirements under the design uniformly distributed loads. The global and local failure modes under the successive concentrated loads were overall flexural-torsional buckling of the hanger beam and local buckling of the compressive flange plate， respectively. The installation of connecting batten plates between the double-limb cold-formed C-section steel webs enhanced the stiffness， ultimate bearing capacity and deformation capacity of the hanger system.