doi:10.3850/978-981-08-9247-0_rp086-icsas11

ABSTRACT

An investigation of full-scale tests on sub-assemblage frame with high strength members and retrofitted partial strength connection is presented here. Four specimens, incorporating built-up hybrid beam and universal column sections, connected together using retrofitted flush and extended end-plate connection, were tested under monotonic load. The built-up hybrid beam is unrestrained against out-of-plane deformation, resulting buckling deformation control the design. The experimental results clearly illustrate the behaviour of sub-assemblage frame in semi-continuous construction, where the partial strength connection poses some degree of rotational stiffness and moment resistance, capable to reduce the effective length of a beam in the calculation of buckling moment resistance. Comparison with the design approach of BS 5950-1: 2000 for beams subjected to buckling moment show large reserves of strength, which the actual effective length ratio for beams connected using partial strength connection is in the range of 0.65 – 0.75.

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