Earthquake-Resistant Wooden Connection System in Sasak Traditional Buildings in Sade Village, Lombok, Indonesia

Abstract

Traditional settlements on the island of Lombok still survive in several places, namely in Senaru, Karang Bajo, Segenter, Limbungan, Ende and Sade. Bale is another name for the house. Each has a different term. Bale Mangina for the name bale in Senaru, while in other places, it is better known as Bale Tani. Bale Tani is an ordinary dwelling house for the people of Dusun Sade which has an exciting characteristic when viewed from its construction system. Construction systems that are centuries old can adapt to disasters and changing times. This bale is one of several traditional bales that are earthquake resistant. There have been several earthquakes in the field in 2018. As a result, the building structure did not suffer any damage. This research aims to purpose of this research is to study earthquake-resistant wooden connection systems in traditional buildings that must be maintained. Besides that, tests were carried out using SAP (structural analysis program). The method used in this research is a qualitative approach—direct survey data collection techniques to the field. This study concludes that the Bale Tani building is an earthquake-resistant building. The connection system uses pegs and purus, which is a knockdown system. The foundation uses a clamp system, and a wooden connection system is a joint system. From the test results, it can be seen that the post and purus connection system can withstand earthquakes. All of this supports the building's responsiveness to earthquakes as an effort to mitigate natural disasters. So this system is excellent to be applied to areas with a moderate to high scale potential for earthquakes. Besides that, the knockdown model is also suitable for application and development for small-type residential buildings. Of course, there needs to be additional technological engineering in the future.