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Development of Fragility Curves for Short and Mid-Rise RC Buildings Retrofitted with Steel Knee Braces Based on Incremental Dynamic Analysis
, M.Sc. Thesis Sharif University of Technology ; Mofid, Masood (Supervisor)
Abstract
All buildings should be designed to bear both gravity loads and lateral loads such as earthquake. Resisting system for earthquake can be moment resisting frame, shear wall, brace or combination of them. Normally for strengthening of reinforce concrete buildings, shear wall should be added, but in some cases after constructing RC buildings, engineers find out that building does not have enough strength against seismic loads. In this case, adding shear wall is difficult because of architectural restrictions and assembling braces on the original frame is easier.
Structural engineers always looking to find a structural element to absorb earthquake energy to prevent potential damages of other...
Structural engineers always looking to find a structural element to absorb earthquake energy to prevent potential damages of other...
A novel control technique for Power Factor Correction in SEPIC converter utilizing input/output voltage waveforms sampling
, Article PECon 2012 - 2012 IEEE International Conference on Power and Energy ; 2012 , Pages 268-273 ; 9781467350198 (ISBN) ; Sudi, Z ; Mohagheghi, E ; Lakmehsari, A. H ; Hajihosseinlu, A ; Sharif University of Technology
2012
Abstract
In this study, a simple and novel control technique for Power Factor Correction (PFC) is introduced, which is a SEPIC-based (Single-ended Primary-inductor Converter based) rectifier with high input power factor. Operation of the proposed method is based on sampling of input and output voltages in SEPIC rectifier. Using samples of input and output voltage, this control system makes the input current to follow a sinusoidal path. As a result, the line current?'s Total Harmonic Distortion (THD) is reduced and the input power factor is improved. This paper also compares the new method with the conventional control method for the power factor correction. In order to examine the proposed control...