Civil Engineering and Architecture Vol. 12(1), pp. 185 - 202
DOI: 10.13189/cea.2024.120116
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Numerical Study of Behavior of Castellated Beam under Cyclic Loading


Kevin Tanady 1, Bambang Suryoatmono 2,*
1 Department of Civil Engineering, Faculty of Engineering, Tarumanagara University, Indonesia
2 Department of Civil Engineering, Faculty of Engineering, Parahyangan Catholic University, Indonesia

ABSTRACT

The use of castellated beam as structural members in buildings is increasing nowadays due to its higher moment of inertia compared to its original wide-flange beam. However, the presence of holes in castellated beams causes high stress concentration around the holes and may cause failure, especially in the beam-to-column joint under cyclic load. This study aims to determine the behavior of castellated beams when loaded with cyclic loads and compare it with the behavior of the original wide-flange beam. Nonlinear finite element method is utilized to perform the analysis. Both geometric and material nonlinearity are considered in the analysis. The structural system analyzed in this study is an isolated column-and-beam system from the moment resisting structural system. The cyclic loading pattern applied follows the guidelines given by ATC-24 1992, with controlled displacement as disturbance to the structure. This research shows that castellated beams failed locally in the vicinity of the hole. Local failure in the castellated beam causes the castellated beam to fail before reaching its full (plastic) moment capacity under cyclic load. On the other hand, the failure of the origin wide-flange beam under the same cyclic load is bending failure. These two failure modes are shown in the von Mises stress distribution of both castellated and wide-flange beams. These results support previous experimental studies that under cyclic load the stress concentration at the nearest hole to the column causes the castellated beam to fail much below its moment capacity. Therefore, based on this study, castellated beam is less recommended compared to the original wide-flange beam to be used to withstand dynamic load such as earthquake load due to its lower ductility and local failure behavior.

KEYWORDS
Castellated Beam, Numerical Analysis, Cyclic Loading, Local Failure

Cite This Paper in IEEE or APA Citation Styles
(a). IEEE Format:
[1] Kevin Tanady , Bambang Suryoatmono , "Numerical Study of Behavior of Castellated Beam under Cyclic Loading," Civil Engineering and Architecture, Vol. 12, No. 1, pp. 185 - 202, 2024. DOI: 10.13189/cea.2024.120116.

(b). APA Format:
Kevin Tanady , Bambang Suryoatmono (2024). Numerical Study of Behavior of Castellated Beam under Cyclic Loading. Civil Engineering and Architecture, 12(1), 185 - 202. DOI: 10.13189/cea.2024.120116.