Optimization of viscous damper systems in frame buildings using nonlinear programming : a cost-effective approach to seismic response | |
| Author | Chananyu Choochouy |
| Call Number | AIT Thesis no.ST-24-22 |
| Subject(s) | Nonlinear programming Structural engineering |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering in Structural Engineering |
| Publisher | Asian Institute of Technology |
| Abstract | This study introduces an optimization approach for designing viscous damper systems in building structures, focusing on minimizing seismic responses and overall damper cost through nonlinear programming. The optimization utilizes Zoutendijk's method of feasible directions to achieve cost-effective solutions for both 2D and 3D frame structures. The objective function is defined by the total cost of the damper system, while constraints are placed on story drift to maintain structural safety and stability. Limiting story drift inherently reduces other critical structural responses, including story displacement and shear forces.A comprehensive analysis of 32 damper configurations revealed that a two-damper system offers the lowest total cost, with the optimal configuration placing dampers on the 4th and 5th stories. This placement capitalizes on the high story drift in the first and second vibration modes at these levels, leading to significant cost savings.Furthermore, the optimization process demonstrated robustness across various initial guesses,consistently converging to the same solution. For 3D models, structural symmetry produced behavior similar to the 2D model, while the introduction of mass eccentricity induced coupled lateral-torsional responses, necessitating higher damping forces in mass-concentrated regions. |
| Year | 2024 |
| Type | Thesis |
| School | School of Engineering and Technology |
| Department | Department of Civil and Infrastucture Engineering (DCIE) |
| Academic Program/FoS | Structural Engineering (STE) /Former Name = Structural Engineering and Construction (ST) |
| Chairperson(s) | Pennung Warnitchai |
| Examination Committee(s) | Thanakorn Pheeraphan;Punchet Thammarak;Krishna, Chaitanya |
| Scholarship Donor(s) | Royal Thai Government Fellowship |
| Degree | Thesis (M. Eng.) - Asian Institute of Technology, 2024 |