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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Simplified Approach Based on the Natural Period of Vibration for Considering Second-Order Effects on Reinforced Concrete Frames

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Author(s):
Reis, Daniel G. [1] ; Siqueira, Gustavo H. [2] ; Vieira, Jr., Luiz C. M. [2] ; Ziemian, Ronald D. [3]
Total Authors: 4
Affiliation:
[1] Prefeitura Municipal Campinas, Ave Anchieta 200, BR-13015904 Campinas, SP - Brazil
[2] Univ Estadual Campinas, Sch Civil Engn Architecture & Urban Design, Rua Saturnino de Brito 224, BR-13083889 Campinas, SP - Brazil
[3] Bucknell Univ, Dept Civil & Environm Engn, 367 Breakiron Engn Bldg, Lewisburg, PA 17837 - USA
Total Affiliations: 3
Document type: Journal article
Source: INTERNATIONAL JOURNAL OF STRUCTURAL STABILITY AND DYNAMICS; v. 18, n. 5 MAY 2018.
Web of Science Citations: 1
Abstract

Recent studies have demonstrated the existence of a relationship between a structures susceptibility to second-order effects and its natural period of vibration (T) given that both these properties are fundamentally dependent on the structure stiffness and mass properties. The main advantage of the use of this characteristic is that T can be obtained easily by the existing structural analysis software. In this study, different formulations are developed in order to propose an amplification factor (chi(T)) to multiply first-order analysis results and satisfactorily obtain results of a second-order analysis. These formulations are based on D'Alembert's principle, Rayleighs method, and the use of generalized coordinates to represent the dynamic displacement of flexible structures. It is observed that chi(T) provides values closer to and in fact, more conservatively than, those obtained by the conventional simplified methods currently used by structural design engineers. Thus, the amplification factor chi(T), which is based on the natural period of vibration, is proposed to be used as (i) an indicator of a structure susceptibility to second-order effects and (ii) an amplification factor to describe the second-order effects on reinforced concrete frames. (AU)

FAPESP's process: 15/18450-8 - The use of natural period of vibration as an indicator of the global second-order effects on reinforced concrete structures
Grantee:Gustavo Henrique Siqueira
Support Opportunities: Regular Research Grants