- Simplified evaluation of seismic behavior of beam-column joints in reinforced concrete frames
- A. Prota ; Gaetano Manfredi ; G.P. Lignola
The 15th World Conference on Earthquake Engineering, Lisbon, Portugal, Paper No. 4235 - Year: 2012
- Earthquake engineering
PDF |
- Simplified Assessment of Railway Masonry Bridges Seismic Capacity
- G. Tecchio ; P. Zampieri ; F. da Porto ; C. Modena ; A. Prota ; G Manfredi
- Book Title / Journal: Proceedings of the 15th World Conference on Earthquake Engineering, Lisbon, Portugal
- Year: 2012 , Volume: , Series:
- Earthquake engineering
- Keywords: Masonry arch bridges ; seismic assessment ; Limit state analysis
- Description
- Masonry arch bridges represent the greatest portion of all the bridges in use in the Italian railway network. The
typological characteristics of these structures were identified on a large stock of 380 bridges located in high
seismicity areas, subdividing them into a set of homogeneous classes. Subsequently a parametrical analysis was performed for each class, in order to calculate the seismic capacity of
the bridges: appropriate ranges for geometrical and mechanical parameters, i.e. span length, arch thickness, spantorise ratio, pier height, etc. were considered, and the limit horizontal load multiplier was calculated for each
relevant collapse mechanism. Finally, envelope curves representing the seismic capacity expressed in terms of limit horizontal acceleration were derived, the input data of which are only easily detectable geometric parameters. These curves can be used for a simplified vulnerability assessment of railway masonry arch bridges, and for prioritizing further investigations and retrofit interventions.
PDF |
- Particle Methods for a 1D Elastic Model Problem: Error Analysis and Development of a Second-Order Accurate Formulation
- D. Asprone ; F. Auricchio ; G. Manfredi ; A. Prota ; A Reali ; G Sangalli
- Book Title / Journal: Computer Modeling in Engineering & Sciences
- Year: 2010 , Volume: 62 , Series:
- Structural Analysis
- Keywords: Meshless methods ; Particle methods ; Error Evaluation ; Kernel Particle Methods
- Description
- Particle methods represent some of the most investigated meshless approaches, applied to numerical problems, ranging from solid mechanics to fluiddynamics and thermo-dynamics. The objective of the present paper is to analyze some of the proposed particle formulations in one dimension, investigating in particular how the different approaches address second derivative approximation.
With respect to this issue, a rigorous analysis of the error is conducted and a novel second-order accurate formulation is proposed. Hence, as a benchmark, three numerical experiments are carried out on the investigated formulations, dealing
respectively with the approximation of the second derivative of given functions, as well as with the numerical solution of the static problem and with the approximation of the vibration frequencies for an elastic rod. In each test, the obtained numerical results are compared with exact solutions and the main criticalities of each formulation are addressed.
PDF |
- Innovative technique for seismic upgrade of rc square columns.
- A. Prota ; Gaetano Manfredi ; A. Balsamo ; E. Cosenza ; A. Nanni
- FRPRCS-7, ACI, SP-230—73, pages 1289-1304. Available at http://www.quakewrap.com/technical-papers-on-Fiber-Reinforced-Polymer.php
- Book Title / Journal:
- Year: 2005 , Volume: , Series:
- Repair and Retrofit of Structures
- Keywords: Concrete structures
PDF |
