View in EDS

Behavior of post-tensioned connections with stiffened angles under cyclic loading.

Saved in:
Bibliographic Details
Title: Behavior of post-tensioned connections with stiffened angles under cyclic loading.
Authors: Shiravand, M.R.1 m_shiravand@sbu.ac.ir, Mahboubi, S.1
Source: Journal of Constructional Steel Research. Jan2016, Vol. 116, p183-192. 10p.
Subjects: Stiffness (Engineering), Cyclic loads, Surface tension, Structural engineering, Numerical analysis, Energy dissipation
Abstract: Post-tensioned (PT) connections are used in steel moment resisting frames to eliminate structural damage and minimize residual drifts under seismic loads. A steel post-tensioned connection with top and seat angles has recently been developed. The angles act as energy dissipation devices in PT connections. In this research, stiffeners are added to the top and seat angles to improve the energy dissipation capacity of post-tensioned connections. Numerical analysis is performed and some relations are proposed to predict the behavior of post-tensioned connections with stiffened angles. The analysis results show that adding stiffeners to the connection angles increases the connection resistance at high inter-story drift angles. Moreover, stiffeners help concentrating the more residual deformation in the top and seat angles and increase the energy dissipation capacity of the connection. According to the results, we obtain modification factors as a function of angle and stiffener geometry in derived relations to predict the total connection moments under applied loading. [ABSTRACT FROM AUTHOR]
Copyright of Journal of Constructional Steel Research is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
Description
Abstract:Post-tensioned (PT) connections are used in steel moment resisting frames to eliminate structural damage and minimize residual drifts under seismic loads. A steel post-tensioned connection with top and seat angles has recently been developed. The angles act as energy dissipation devices in PT connections. In this research, stiffeners are added to the top and seat angles to improve the energy dissipation capacity of post-tensioned connections. Numerical analysis is performed and some relations are proposed to predict the behavior of post-tensioned connections with stiffened angles. The analysis results show that adding stiffeners to the connection angles increases the connection resistance at high inter-story drift angles. Moreover, stiffeners help concentrating the more residual deformation in the top and seat angles and increase the energy dissipation capacity of the connection. According to the results, we obtain modification factors as a function of angle and stiffener geometry in derived relations to predict the total connection moments under applied loading. [ABSTRACT FROM AUTHOR]
ISSN:0143974X
DOI:10.1016/j.jcsr.2015.09.003