Passive and Active Control Analysis of Mosque Structures under Earthquake Excitations

• Main Authors: Julian Fikri, 朱利安
• Other Authors: Prof. Li-Jeng Huang
• Format: Others
• Language: en_US
• Published: 2018
• Online Access: http://ndltd.ncl.edu.tw/handle/wzgpun

碩士 === 國立高雄應用科技大學 === 土木工程與防災科技研究所 === 106 === Mosque structure is an important place for Muslim follower for doing their regular religious activity. This typical structure is usually built in a simple shape, rectangle or square, and has a simple roof which is flat or dome. Due to its purpose, the structure is demanded to have a large free area (column free) in the center. This typical structure is common in Indonesia where tremendous earthquake usually occurs and caused catastrophic failure to the structure. When earthquake happens, the structure should be strong enough to stand against external disturbance and/or long-term fatigue resulting from vibrations with large amplitude. Based on that, it is necessary and important to study the behavior of typical mosque structure for both uncontrolled and controlled (passively and actively) under earthquake excitation. In this study, we will use passive control systems using; diagonal brace damper, toggle brace damper and tuned mass damper (TMD). Then we will develop active control systems using a tuned mass damper (TMD) by applying proportional gain, pole placement, and optimal control linear quadratic regulator (LQR) to the system. Firstly, we create a mathematical model of the typical mosque structure as a 1-story and 2-story building for both uncontrolled and controlled system. We construct and then transfer the equation of motion of the structure into state space representation then solve it using Runge-Kutta method in free vibration and seismic responses. In the seismic analysis, we use two earthquake data records, 1940 El Centro and 1995 Kobe ground accelerations. The results of the study conclude that by using some structural control devices, we can reduce significant structure responses such as displacement, velocity, and acceleration of the structure. Furthermore, we can confirm that TMD together with active control strategies leads to satisfactory efficiency in reducing the dynamic responses of the Mosque structure subjected to earthquake ground excitations.