CAPACITY OF PRECAST HYBRID WITH COLD FORM STEEL (CFS) TRUSS SYSTEM Andreas Rudi Hermawan (a), Suripto (a), Yanuar Setiawan (a*), Eka Sasmita Mulya (a)
a) Departement Civil Engineering, Politeknik Negeri Jakarta
Jalan Prof. Dr. G. A. Siwabessy, Depok 16425
*yanuar.setiawan[at]sipil.pnj.ac.id
Abstract
A faster, safer, more comfortable, and more economical construction method is increasingly needed. Therefore, this research introduces an innovative method and system for construction, focusing on a precast hybrid beam with a cold-formed steel (CFS) truss system. The testing method was applied to two loads at two points at the top of beam and truss refer to ASTM C78-02. The aim of the research was to decide flexural strength, maximum moment and deflection of that beam and truss. The specimens consisted of precast hybrid with cold form steel (CFS) truss system P1 and P2 and CFS system truss non-concrete T1 and T2. The research has resulted in the deflection of Precast Hybrid Beam with CFS Truss System P1 of 9,97 mm at a maximum moment of 3760,54 Kg-m and deflection of Precast Hybrid Beam with CFS System Truss P2 of 8,44 mm at a maximum moment of 3857,11 Kg-m. From the data, the deflections have resulted in CFS System Truss T1 of 9,67 mm at a maximum moment of 738,07 Kg-m and the deflection of CFS System Truss T2 of 16,68 mm at a maximum moment of 606.54 Kg-m. Precast hybrid beam with CFS System Truss behaves as a normal beam and has enough ductility with δ-u/δ-y 1,83 for specimen P1 and 1,71 for P2. The conclusion is that precast hybrid with CFS truss system P1, P2 have moment capacity 5,67 times of moment capacity of T1, T2 having significant enhance.
Keywords: Precast, concrete, hybrid, ductile, cold form steel
