VOL. 11, NO. 11, JUNE 2016 ISSN 1819-6608 ARPN Journal of Engineering and Applied Sciences © 2006-2016 Asian Research Publishing Network (ARPN). All rights reserved. www.arpnjournals.com 6814 FLEXURAL CAPACITY AND DUCTILITY OF CASTELLA BEAM DUE TO CYCLIC LOAD Mara Junus Department of Civil Engineering, Paulus Christian University of Indonesia, Makassassar, Indonesia E-Mai: mara.junus@gmail.com ABSTRACT The purpose of this study was to determine the flexure capacity and ductility of the castella beam due to cyclic load. This research was carried out through testing castella beams in the form of a portal with cyclic loading. Solid beams steel used is profiles IWF 200 100 5.5 8 fabricated became castella beam. Test beam consists of a solid beam (NB) as a comparison and castella beams (CB). The test results show increase 1.6 H of the high of CB beam, will affect to increase of the section modulus (Sx) and moment of inertia (Ix) respectively by 76.41% and 173.43% compared to NB beam. This increase is affect the increased flexure capacity castela beam of 82.5% compared to the beam NB Besides that, increases in the beam high will increase the slenderness cross section (H/B) and lower radius of inertia (ry) on the y-axis. This causes the transverse displacement of the CB beam is greater than NB beam. This condition causes the beam CB is less deformed in the vertical direction. This is shown by the ductility of the CB beam decreased by 46, 92 % compared to NB beams. Resistance is proportional to ductility, if the increased load will be followed by an increase in ductility. This relationship is shown by both of the beam test. Keywords: castella, flexure, ductility, cyclic load. 1. INTRODUCTION The need for shelter is increasingly rising day by day in Indonesia in line with population growth. Besides, the land for the construction of buildings or other buildings is more difficult to obtain and the price is higher, especially in urban areas. To save the land, then the solution is to build a multi-storey building for office buildings, dwellings or other buildings. Most of the building structure with steel material uses solid steel profiles as advantageous solution in terms of strength and material usage. Experts are trying to structure how to increase the strength of steel elements without an increase in self-weight of steel in order to obtain some new methods that beams with openings entity known as castella beam. One form of the body opening is hexagon shape. Research on this openings has been done by Wakchaure MR, Sagade AV, Auti V. [2012] and the results showed that the openings with 0.6 of the beam height is the possible maximum openings, or in other words the maximum eligible beam height of the castella beam that can be fabricated. Research on the angle and length of exposure to a high of 0.60 to a high aperture solid beam has been carried out by Parung Herman et al [2013] are given monotonic load. Solid steel profiles fabricated into castella beam is IWF 200 100 5.5 8. Research results show the opening angle of 60 0 and aperture length e = 3b = 9 cm gives the best result of the angle and length of openings for openings hexagon. Mara Junus [2016] continue this research by testing Castella beams with the concrete filled between the flange and burdened with cyclic loading. The results showed flexure capacity of the castela beams with concrete filled between the flange increased by 187.34% compared to normal beam. This study aims to determine the flexure capacity and ductility of the castella beam due to cyclic loading. 2. TESTING PROGRAM 2.1 Testing principle The principle of the test is based on the structure of the framework that burdened earthquake load as in Figure-1. The zero moment on the beams and columns are considered as the hinge (H). Figure-1. (a) The moment area of a frame due to earthquake loads, (b) Principle of the test beam-column element. 2.2 Test beams Specimens, a steel beam used is a profile IWF 200 x 100 x 8 x 5.5 with hexagon shaped openings. High aperture 0.6 H, a distance of 9 cm and the aperture opening angle 60 0 . The pabrication process of castella beam as in Figure-2.