Earthquakes
Mostrando 1-12 de 63 artigos, teses e dissertações.
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1. Damage localization and quantification of tower structures based on the super-element method
Abstract Tower structures are sensitive to hurricanes or earthquakes, whereupon they are easily damaged due to large deflection and dynamic responses. Herein, a method is proposed to accurately identify the location and extent of damage in tower structures. Firstly, a tower structure is divided into several sections along its height, and each section is rega
REM, Int. Eng. J.. Publicado em: 2021-01
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2. Constraints from magnetotellurics on the geological structure across a seismic area associated with water wells in the Paraná basin, Brazil
ABSTRACT: The occurrence of earthquakes associated with the opening of groundwater wells is a very rare phenomenon. We present the results from a magnetotelluric profile of about 4 km-long that crosses a seismic zone near the town of Bebedouro, in the Northeastern part of the intra-cratonic Paraná basin, in Brazil. The seismic activity is thought to be caus
Braz. J. Geol.. Publicado em: 13/01/2020
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3. Ground motions for FEMA P-695 application in subduction zones
Abstract The FEMA P-695 report presents a methodology for the rational quantification of seismic performance factors for use in seismic design. Despite the fact that the methodology is comprehensive and covers a wide range of possible applications, it only provides ground motion sets recorded from shallow crustal earthquakes. Therefore, this paper presents a
Lat. Am. j. solids struct.. Publicado em: 25/11/2019
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4. Seismic evaluation and partial retrofitting of concrete bridge bents with defect details
Abstract The need for seismic retrofitting of bridges after severe earthquakes has become important in recent years. This study examines the seismic evaluation of concrete bents of highway bridges designed and implemented according to the 1990s regulations. Compared with the older codes, 1990s codes have more complex details for connections which are evaluat
Lat. Am. j. solids struct.. Publicado em: 30/09/2019
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5. FE Modeling and Seismic Performance Evaluation of Hybrid SMA-Steel RC Beam-Column Joints
Abstract Severe permanent deformations of buildings during earthquakes have been found as one of the major causes of the instability and failure of structures. The application of superelastic Shape Memory Alloy rebars at the plastic hinge region of reinforced concrete beam-column joints (SESMA-BCJs) can eliminate the seismic residual deformations. Such self-
Lat. Am. j. solids struct.. Publicado em: 27/06/2019
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6. Numerical Study of the Circumferential Fuses Used in Steel Repairable Buildings with Seesaw Motion
Abstract Structural fuses and rocking system are used in order to reduce the building response to earthquakes and damage guidance. In the proposed seesaw motion system, which is similar to the rocking system, the building columns, in top of the foundation, have been removed and a central support and structural fuses are used around the building instead of th
Lat. Am. j. solids struct.. Publicado em: 21/03/2019
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7. Seismic Evaluation of Horizontally Curved Bridges Subjected to Near-Field Ground Motions
Abstract Horizontally curved bridges have more complex seismic behavior than straight bridges and have been more vulnerable to earthquakes. The present study aimed to evaluate the seismic response of concrete bridges with straight and arched box girder decks in isolated and non-isolated states. The results indicated that increasing the curvature of the non-i
Lat. Am. j. solids struct.. Publicado em: 14/03/2019
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8. The logistic experience of the Brazilian Navy in humanitarian operations: the cases of earthquakes in Haiti and Chile in 2010
Abstract Paper aims Based on the naval logistics doctrine, this paper describes and analyzes the Brazilian Navy's actions and the obstacles encountered in humanitarian operations conducted during the earthquakes in Haiti and Chile, both in 2010. Originality The main contribution is to report the use of Brazilian military personnel in humanitarian operati
Prod.. Publicado em: 04/02/2019
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9. Experimental and numerical study of I-shape slit dampers in connections
Abstract This paper proposes a new beam to column connection which has slit dampers to increase ductility and moment capacity of structures. After Northridge and Kobe earthquakes, many researchers have tried to achieve more ductile connections. Ductility of connections causes to dissipate more energy before failure of connections. Also, some researchers have
Lat. Am. j. solids struct.. Publicado em: 14/11/2018
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10. Three-level performance-based optimization method of steel frames
Abstract This paper describes a three-level performance-based optimization model and an estimate method of residual top displacement for steel frames at three earthquake levels. The steel frames are supposed to be elastic at frequent earthquake, inelastic and hardening at occasional and rare earthquakes, respectively. The estimate formula is derived and est
Lat. Am. j. solids struct.. Publicado em: 23/04/2018
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11. Experiment and Calculation Method of the Dynamic Response of Deep Water Bridge in Earthquake
Abstract For deep-water long span bridges under earthquakes, the interaction between water and structure will inevitably induce the hydrodynamic force on the structures. Based on the Morison potential fluid theory, a simplified calculation method of hydrodynamic force was proposed. Taken the 3rd Nanjing Yangtze River Bridge in China as the prototype, the sha
Lat. Am. j. solids struct.. Publicado em: 2017
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12. Dispersion of Love wave in an isotropic layer sandwiched between orthotropic and prestressed inhomogeneous half-spaces
Abstract An in-depth study has been carried out for the dispersion of Love waves in an isotropic elastic layer sandwiched between orthotropic and prestressed inhomogeneous elastic half-spaces. The inhomogeneities in density and rigidity of the lower half-space are space dependent and an arbitrary function of depth. Simple mathematical techniques are used to
Lat. Am. j. solids struct.. Publicado em: 2015-10