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A NONLINEAR DYNAMIC BASED REDUNDANCY INDEX FOR REINFORCED CONCRETE FRAMES

Publish Year: 1388
Type: Conference paper
Language: English
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ICCD03_030

Index date: 11 October 2008

A NONLINEAR DYNAMIC BASED REDUNDANCY INDEX FOR REINFORCED CONCRETE FRAMES abstract

In almost all codes of practice for seismic resistant design of buildings, a behavior factor is used to reduce design base shear. The behavior factor is affected by several parameters such as ductility, overstrength and redundancy reduction factors. There are two common approaches to assess the effects of redundancy on the strength of a structural system, which are as follows: Static Pushover Analysis and Incremental Dynamic Analysis. The two indices: redundancy strength coefficient and redundancy variation coefficient have been introduced to measure these effects. Simplified methods are developed and presented to calculate these parameters. In this paper the redundancy strength and the redundancy variation parameters are evaluated for the reinforced concrete plane frames with different number of stories, bays and ductility capacities. The investigations indicate that these two parameters are mainly the results of redundancy reduction factors.

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A NONLINEAR DYNAMIC BASED REDUNDANCY INDEX FOR REINFORCED CONCRETE FRAMES authors

A.A Fallah

Ph.D. Candidate, Science and Research Branch Islamic Azad University, Tehran,

A Sarvghad Moghadam

Associate Professor, Civil Engng. Dept., International Institute of Earthquake Engineering and Seismology, Tehran,

A Massumi

Assistant Professor of Structural Engineering, Graduate School of Engineering, Tarbiat Moallem University of Tehran (Kharazmi), Tehran,