PERENCANAAN ULANG BALOK BETON BERTULANG PADA GEDUNG RUSUNAWA UMM DENGAN METODE STRUT AND TIE

Abstract

Deep beam is the reinforced concrete structure, which has loads like normal beam, but has a
comparatively high rate / width of a large, with clean span of Ln equal to or less than four times the
overall member height (h) or twice effectively depth beam (2d ) from the face of support with
concentrated loading. Strut and Tie Model (STM) is a method used to find the balance between load
and reaction forces in the concrete and steel.
Redesign on Rusunawa beams using deep beam structure that consists of, beam 0.9 mx0,3m
with length 6.8 m that loaded of concentrated loading and deep beam 1.3 mx0, 4m by 4.2 meters
long that uniformly distributed loading. quality of concrete is used 25 Mpa and the quality of Steel
350 Mpa
From the results of planning by using Strut and Tie Model (STM), obtained main flexure
reinforcement of 6.8 meters is 4D19 for tensile bar and 5D19 for assembling bar. and Ø8- 160mm
for horizontal and vertical stirrups. As for the deep beam spans 4.2 meters, obtained flexure
reinforcement is 5D20 for tensile and assembling bar and Ø8 - 220.2 mm for horizontal and vertical
stirrups.

Keywords: Deep beam, Strut and Tie method