Seismic Behavior of Joglo Traditional Wooden House Located in Special Region of Yogyakarta, Indonesia

Joglo traditional wooden buildings are buildings that are still widely found in the city of Yogyakarta, Indonesia. These buildings were built in the sixteenth century and were not damaged during several earthquakes in the area in the years of 2001, 2004, 2006, and 2023. The purpose of this research is to study the stiffness and strength behaviors of Joglo wooden buildings due to seismic and gravity loads. The scope of the research is that the existing wooden building studied uses Teak wood (Tectona grandis) and it is located in Special Region of Yogyakarta, Indonesia. It was built in the sixteenth century. The behaviors studied are deformation and drift due to lateral loads in accordance with current Indonesian seismic code SNI 1726, and the capacities of the columns and the beams in accordance with current Indonesian timber code SNI 7973. The results obtained from this research show that the drift due to the design earthquake load is lower than the permitted limit. The results of modal analysis show that there is no twist in the first and second modes and the pattern of the first and second modes of the building are translated in each of the main directions. The strengths of the columns and the beams are much higher than the required strength. These results can be used as a reference for academics, practitioners, and the public that the Joglo wooden building structure system is safe against earthquake.