ESTIMATION OF NEAR-SOURCE GROUND MOTION AND SEISMIC BEHAVIOUR OF RC FRAMED STRUCTURES DAMAGED BY THE 1999 ATHENS EARTHQUAKE

2005 ◽  
Vol 9 (5) ◽  
pp. 609-635 ◽  
Author(s):  
L. DECANINI ◽  
L. LIBERATORE ◽  
F. MOLLAIOLI ◽  
A. DE SORTIS
Keyword(s):  
Ground Motion ◽  
Seismic Behaviour ◽  
Framed Structures ◽  
Athens Earthquake ◽  
Rc Framed Structures

scholarly journals A fibre flexure-shear model for seismic analysis of RC-framed structures

2009 ◽  
Vol 38 (5) ◽  
pp. 565-586 ◽  
Author(s):  
P. Ceresa ◽  
L. Petrini ◽  
R. Pinho ◽  
R. Sousa
Keyword(s):  
Seismic Analysis ◽  
Shear Model ◽  
Framed Structures ◽  
Rc Framed Structures

Influence of Masonry Infills on the Shear Forces of RC Framed Structures

2016 ◽  
Vol 847 ◽  
pp. 361-368 ◽  
Author(s):  
Daniele Perrone ◽  
Vincenzo Saponaro ◽  
Marianovella Leone ◽  
Maria Antonietta Aiello
Keyword(s):  
Mechanical Properties ◽  
Young Modulus ◽  
Shear Forces ◽  
Seismic Behaviour ◽  
Masonry Infills ◽  
Rc Frames ◽  
Infill Panels ◽  
Rc Framed Structures ◽  
Global And Local ◽  
Modelling Approach

The damages observed during the earthquakes occurred in the last decades have clearly shown as the influence of infill panels on the seismic behaviour of Reinforced Concrete (RC) buildings should be taken into account; the global stiffness and the strength of the RC frames are significantly modified by the infills. In the present study the influence of infills in terms of shear forces has been analyzed by means of linear static analysis; a parametric study has been carried out to evaluate the behavior of infilled frames varying both modelling approach and the mechanical properties of the masonry infills. In terms of modelling approach the single and multi-strut models have been adopted; the Young modulus of masonry infills have been varied in the common range proposed in literature. The results show that multi-strut approach is able to predict both global and local behavior. In addition, the importance of the mechanical properties of masonry infills in the evaluation of the elastic period and shear force in the columns is underlined.

scholarly journals Seismic Response of a Base Isolated Cable-Stayed Bridge Under Near-Fault Ground Motion Excitations

2018 ◽  
Vol 15 (1) ◽  
pp. 1-14
Author(s):  
Ahad Javanmardi ◽  
Zainab Ibrahim ◽  
Khaled Gheadi ◽  
Mohammed Jameel ◽  
Usman Hanif ◽  
...  
Keyword(s):  
Ground Motion ◽  
Ground Motions ◽  
Nonlinear Dynamic Analysis ◽  
Dynamic Responses ◽  
Base Shear ◽  
Seismic Behaviour ◽  
Isolation System ◽  
Near Fault ◽  
Cable Stayed Bridge ◽  
Near Fault Ground Motion

Nowadays, development of cable-stayed bridges is increasing around the world. The mitigation of seismic forces to these bridges are obligatory to prevent damages or failure of its structural members. Herein, this paper aimed to determine the near-fault ground motion effect on an existing cablestayed bridge equipped with lead-rubber bearing. In this context, Shipshaw cable-stayed bridge is selected as the case study. The selected bridge has a span of 183.2 m composite deck and 43 m height of steel tower. 2D finite element models of the non-isolated and base isolated bridges are modelled by using SAP2000. Three different near-fault ground motions which are Tabas 1978, Cape Mendocino 1992 and Kobe 1995 were subjected to the 2D FEM models in order to determine the seismic behaviour of the bridge. The near-fault ground motions were applied to the bridge in the longitudinal direction. Nonlinear dynamic analysis was performed to determine the dynamic responses of the bridge. Comparison of dynamic response of nonisolated and base isolated bridge under three different near-fault ground motions were conducted. The results obtained from numerical analyses of the bridge showed that the isolation system lengthened the period of bridge and minimised deck displacement, base shear and base moment of the bridge. It is concluded that the isolation system significantly reduced the destructive effects of near-fault ground motions on the bridge.

scholarly journals Effect of Unreinforced Masonry Infill Walls on Seismic Performance of Reinforced Concrete Framed Structures

2017 ◽  
Vol 11 (1) ◽  
pp. 919-931 ◽  
Author(s):  
Mohamed M. Abdelaziz ◽  
Mohamed S. Gomaa ◽  
Hany El-Ghazaly
Keyword(s):  
Reinforced Concrete ◽  
Seismic Performance ◽  
Unreinforced Masonry ◽  
Shear Forces ◽  
Infill Walls ◽  
Framed Structures ◽  
Masonry Infill ◽  
Analysis And Design ◽  
Masonry Infill Walls ◽  
Rc Framed Structures

Introduction:Unreinforced Masonry infill walls (URM) are commonly used in the Reinforced Concrete (RC) framed structures as interiors and exteriors partition walls. Although they usually are not considered in the structural analysis and design, their influence on the seismic performance of the framed structures is significant. A common practice in the modern and old RC buildings is to remove the URM walls in the lower stories for commercial reasons; garages, storages, shopsetc.Methods:In the present work, the effect of the URM walls on seismic performance of the RC framed structure will be studied. For that, three groups of 2-D three-bay framed structures, which are fully and partially infilled with the URM walls, will be studied. These groups are classified as three stories, six stories, and nine stories RC framed structures representing low, medium and, high rise buildings; respectively. In each group, different infill panels' configuration will be studied in order to simulate the cases of ignoring or considering the stiffness and strength of the URM. Double-strut nonlinear cyclic model for masonry panels has been utilized in order to account for the structural action of the URM walls. Pushover analysis is adopted for the evaluation of the seismic response of the frames considering the material inelasticity and the geometric nonlinearity in the analysis.Results and Conclusion:Some selected numerical simulation results in terms of base shear forces, lateral deflections, and inter-story drift ratios are obtained for all the considered configurations and presented in comparative way. The regular distribution of the infill walls can improve the framed structure performance. However, omitting the infill from the ground story leads to soft story phenomena as the columns in this story are more vulnerable due to the shear forces acting on them.

scholarly journals Correction to: The multiple slope discontinuity beam element for nonlinear analysis of RC framed structures

Meccanica ◽  
2018 ◽  
Vol 53 (6) ◽  
pp. 1491-1491
Author(s):  
Mohsen Rezaee Hajidehi ◽  
Antonino Spada ◽  
Giuseppe Giambanco
Keyword(s):  
Nonlinear Analysis ◽  
Beam Element ◽  
Framed Structures ◽  
Slope Discontinuity ◽  
Rc Framed Structures

Validation of simplified tying force method for robustness assessment of RC framed structures

2021 ◽  
Vol 249 ◽  
pp. 113291
Author(s):  
S. Ravasini ◽  
J. Sio ◽  
L. Franceschini ◽  
B.A. Izzuddin ◽  
B. Belletti
Keyword(s):  
Framed Structures ◽  
Force Method ◽  
Rc Framed Structures ◽  
Robustness Assessment
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