scholarly journals UB-ALMANAC: An adaptive limit analysis NURBS-based program for the automatic assessment of partial failure mechanisms in masonry churches

2018 ◽  
Vol 85 ◽  
pp. 201-220 ◽  
Author(s):  
Andrea Chiozzi ◽  
Nicola Grillanda ◽  
Gabriele Milani ◽  
Antonio Tralli
Keyword(s):  
Limit Analysis ◽  
Failure Mechanisms ◽  
Automatic Assessment ◽  
Partial Failure ◽  
Masonry Churches

Seismic Safety Assessment of the “Tekyeh Amir Chakhmagh” by Simplified Kinematic Limit Analysis

2010 ◽  
Vol 133-134 ◽  
pp. 653-658
Author(s):  
Seyed Rohollah Pashanejati ◽  
Climent Molins
Keyword(s):  
Limit Analysis ◽  
Safety Assessment ◽  
Failure Mechanisms ◽  
Three Dimensional ◽  
Masonry Buildings ◽  
Seismic Safety ◽  
Early 19Th Century ◽  
Analysis And Design ◽  
Macro Block ◽  
Kinematic Limit

This paper presents an investigation about the capabilities of simplified kinematic limit analysis for the safety evaluation and for the design of strengthening of masonry historical buildings. Limit analysis allows, with a reduced number of mechanical properties and for a given ultimate condition of the structure, affordable safety analysis and design of strengthening to the practitioners. Masonry buildings subjected to earthquake show in most cases local failure mechanisms rather than global failure mechanisms due to the lack of integrity of structure. For this reason, simplified kinematic limit analysis has been accepted as a method to design the strengthening of masonry buildings, according to the Italian Ordinance (O.P.C.M. 3431). To validate the applicability of this method, its results had been compared with those provided by three dimensional macro block limit analysis (Bustamante, 2003) for the Via Arizzi house. It is worth noting that results of simplified kinematic limit analysis provided similar results as those achieved by 3D macro block. Also this method was implemented to seismic safety assessment of Tekyeh Amir Chakhmagh in Iran based on the results obtained for the out of plane and in plane behaviour of walls. Tekyeh Amir Chakhmagh is an early 19th century tiled edifice that was built to serve as grand-stand for watching religious rites and also provided an imposing entrance to Amir Chakhmagh bazaar. This stunning three-story facade of the building is one of the most recognizable and unusual buildings in Iran.

scholarly journals Numerical and Experimental Analysis of Full Scale Arches Reinforced with GFRP Materials

2014 ◽  
Vol 624 ◽  
pp. 502-509 ◽  
Author(s):  
Ismael Basilio ◽  
Roberto Fedele ◽  
Paulo B. Lourenço ◽  
Gabriele Milani
Keyword(s):  
Upper Bound ◽  
Limit Analysis ◽  
Experimental Analysis ◽  
Failure Mechanisms ◽  
Peak Load ◽  
Numerical Results ◽  
Masonry Arches ◽  
Reinforced Masonry ◽  
The University

In this contribution, original limit analysis numerical results are presented dealing with some reinforced masonry arches tested at the University of Minho-UMinho, PT. Twelve in-scale circular masonry arches were considered, reinforced in various ways at the intrados or at the extrados. GFRP reinforcements were applied either on undamaged or on previously damaged elements, in order to assess the role of external reinforcements even in repairing interventions. The experimental results were critically discussed at the light of limit analysis predictions, based on a 3D FE heterogeneous upper bound approach. Satisfactory agreement was found between experimental evidences and the numerical results, in terms of failure mechanisms and peak load.

Limit Analysis for Triumphal Arches in Masonry Churches: Case Study from L’Aquila 2009 and Central Italy 2016–17 Earthquakes

2021 ◽  
pp. 1391-1407
Author(s):  
Mattia Zizi ◽  
Valentina Corlito ◽  
Daniela Cacace ◽  
Gianfranco De Matteis
Keyword(s):  
Limit Analysis ◽  
Central Italy ◽  
Masonry Churches

M-N Interaction Effect on the Frames Failure Mechanisms

2016 ◽  
Vol 847 ◽  
pp. 248-256 ◽  
Author(s):  
Giuseppe Buonocore ◽  
Antonio Gesualdo ◽  
Antonino Iannuzzo ◽  
Mariano Modano ◽  
Michela Monaco ◽  
...  
Keyword(s):  
Limit Analysis ◽  
Safety Assessment ◽  
Ultimate Load ◽  
Failure Mechanisms ◽  
Bending Moment ◽  
Significant Parameter ◽  
Economical Design ◽  
Computationally Expensive ◽  
Idealised Model ◽  
Careful Assessment

The collapse factor is a significant parameter in the framework of the safety assessment and economical design of ductile structures. This fact draws attention to the necessity of a careful assessment of the limit analysis approaches. The kinematics in these structures arises in fact from the actual rotation of the plastic hinges under axial force and bending moment. It can be shown that it is possible to obtain a reliable tool capable of competing with computationally expensive methodologies. The application of the methods of limit analysis involves a simplified and idealised model of the structure and, notwithstanding the fact that hundreds of papers have been devoted to the topic, some consequences of apparently unimportant simplifications still seem to have not been properly and firmly highlighted. This paper investigates the ultimate load and collapse modes of steel frames under combined vertical and horizontal forces through limit analysis.

Sign in / Sign up

Export Citation Format

Share Document