Performance of Reinforced Concrete Wall Frame Structures Subjected to High Story Eccentricity
No Thumbnail Available
Date
2019-06
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Addis Ababa University
Abstract
The main objective of this project is to study the performance of wall frame
structures subjected to high eccentric loads. This project aims to investigate the
effect of eccentricity on the lateral force resistance capacity of wall frame
structural systems. It also identifies the members that are highly affected by this
high story eccentricity and propose ways to improve their strength. This project
aims to answer questions like; what is story eccentricity in wall frame
structures? What is the response of wall frame structures with high eccentricity
when they are subjected to lateral loads? what are the parameters that are
mainly affected by story eccentricity? What are the effective measures that can
be taken to avoid eccentricity on the structures?
The performance of twelve different buildings with different story levels and shear
wall locations has been investigated using ETABS finite element analysis
software. The building models has been selected to represent wall frame
structures with and without story eccentricity. The analysis and design of each
individual model has been conducted according to Ethiopian building code and
standards. Then the analysis and design output results has been compared,
briefly interpreted and discussed in order understand the effect of eccentricity
on the performance of wall frame structures.
The project found that the lateral load resistance capacity of wall frame
structures is highly dependent on story eccentricity and may cause failure if not
considered during building design. The increase in eccentricity, increased both
the period and inter story drift of the wall frame structure. The structures with
high story eccentricity required bigger lateral load resisting structures than the
structure with minimal or without eccentricity. According to its findings this
project recommended to avoid story eccentricities in building design.
Description
Keywords
high story eccentricity, reinforced concrete, structures, Performance