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Structural Engineering and Mechanics Volume 82, Number 3, May10 2022 , pages 385-400 DOI: https://doi.org/10.12989/sem.2022.82.3.385 |
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Optimization of Sky-Bridge location at coupled high-rise buildings considering seismic vulnerability functions |
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Ahmad Housam Arada, Baki Ozturk, Moustafa Moufid Kassem, Fadzli Mohamed Nazri and Chee Ghuan Tan
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| Abstract | ||
| Sky-bridges between adjacent buildings can enhance lateral stiffness and limit the impact of lateral forces. This study analysed the structural capabilities and dynamic performances of sky-bridge-coupled buildings under various sets of ground motions. Finite Element (FE) analyses were carried out with the link being iteratively repositioned along the full height of the structures. Incremental dynamic analysis (IDA) and probabilistic damage distribution were also applied. The results indicated that the establishment of sky-bridges caused a slight change in the natural frequency and mode shapes. The sky-bridge system was shown to be efficient in controlling displacement and Inter-Storey Drift Ratio (%ISDR) and reducing the probability of damage in the higher floors. The most efficient location of the sky-bridge, for improving its rigidity, was found to be at 88% of the building height. Finally, the effects of two types of materials (steel and concrete) and end conditions (hinged and fixed) were studied. The outcomes showed that coupled buildings with a sky-bridge made of steel with hinged connection could withstand ground motions longer than those made of concrete with fixed connection. | ||
| Key Words | ||
| beta distribution function; coupled high-rise buildings; fragility curves; optimization; sky-bridge; vulnerability functions | ||
| Address | ||
| Ahmad Housam Arada: School of Civil Engineering, Universiti Sains Malaysia, Engineering Campus, 14300 Nibong Tebal, Penang, Malaysia Baki Ozturk: Department of Civil Engineering, Hacettepe University, Faculty of Engineering, Beytepe Campus, 06800, Ankara, Turkey Moustafa Moufid Kassem: School of Civil Engineering, Universiti Sains Malaysia, Engineering Campus, 14300 Nibong Tebal, Penang, Malaysia Fadzli Mohamed Nazri: School of Civil Engineering, Universiti Sains Malaysia, Engineering Campus, 14300 Nibong Tebal, Penang, Malaysia Chee Ghuan Tan: Department of Civil Engineering, Faculty of Engineering, Universiti Malaya, 50603 Kuala Lumpur, Malaysia | ||