Evaluation of the Fundamental Period of Vibration of Irregular Steel Structures
Journal Title: International Journal of Engineering Sciences & Research Technology - Year 30, Vol 3, Issue 4
Abstract
The determination of the fundamental period of vibration of a structure is essential to earthquake design. Current codes equations (ASCE, 2010 and other codes) provide formulas for the approximate period of earthquakeresistant building systems, which are dependent only on the height of the structure or number of stories. Such a formulation is overly conservative and unable to account for structures with geometric irregularities. This paper investigated the fundamental periods of three different types of steel earthquake-resistant building structures: moment resisting frames (MRF), concentrically braced frames (CBF) with varying geometric irregularities. A total of 5, 10, 15 story building designed and analyzed with ETABS. The fundamental periods based on vibration theory for each example were compared with empirical equations, including current code equations as well as equations proposed in recent literature. Based on the results obtained from vibration theory (Rayleigh equation), equations for the approximate fundamental periods are put forth for MRFs and CBFs which take into account vertical and horizontal irregularities. These proposed equations will allow design engineers to quickly and accurately estimate the fundamental period of MRF and CBF structures by taking into account irregularities.
Authors and Affiliations
A. Shafei
Keywords
Related Articles
- EP ID EP138004
- DOI -
- Views 47
- Downloads 0
INCREASING ORGANIZATIONAL EFFECTIVENESS THROUGH ORGANIZATIONAL DIAGNOSIS. COMPARISON BETWEEN PUBLIC INSTITUTIONS IN KOSOVO AND ALBANIA.
The aim of the actual research is the diagnosis of the organizational effectiveness in the public sector in Albania and Kosovo. The research will be focused only on two public institutions, one in Kosovo and one in...
INFORMATION SECURITY AND SECURE SEARCH OVER ENCRYPTED DATA IN CLOUD STORAGE SERVICES
Cloud computing is most widely used as the next generation architecture of IT enterprises, that provide convenient remote access to data storage and application services. This cloud storage can potentially bring g...
Performance and Emission Characteristics of a Four Stoke Diesel Engine Operated by Neem Biodiesel Blended with Diesel
Industrialization and motorization of the world has led to a steep rise in the demand for petroleum products and other side the fast depletion of fossil fuel reserves and issues like global warming have led the re...
Analysis and Implementation of Efficient BLDC Motor Drive with Different Converter Systems
This Paper deals with analysis of efficient BLDC motor drive with various converter systems. Performance of the drive system is compared based on THD and PF at the AC mains with the following converter topology:...
Speed Determination of a Moving Object of a Video Using Background Extraction and
This paper is concerned with the determination of the traveling speed of a moving object of a video clip based on subsequent object detection techniques. After preprocessing of the original image sequence, which i...