- Stress-strain behavior of concrete block masonry prisms under compression
- E. Rizzatti ; C.S. Barbosa ; H.R. Roman ; P.B. Lourenço ; M. Gihad
- Book Title / Journal: 15th International Brick and Block Masonry Conference, Florianópolis, Brazil
- Year: 2012 , Volume: , Series:
- Structure types ; Masonry Structures
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- The effect of one-way arching on enhancing the performance of concrete block walls subjected to blast loading
- S. Foo ; G. Razaqpur ; W.W. El-Dakhakhni ; B. Abou-Zeid
- Book Title / Journal: 15th International Brick and Block Masonry Conference, Florianópolis, Brazil
- Year: 2012 , Volume: , Series:
- Structure types ; Masonry Structures
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- Clay block prisms under compressive loads: testing and modelling
- A. Taliercio ; M.A. Ramalho
- Book Title / Journal: 15th International Brick and Block Masonry Conference, Florianópolis, Brazil
- Year: 2012 , Volume: , Series:
- Structure types ; Masonry Structures
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- Shear strength variation due to mortar strength variation and the use of a triplet shear test set-up
- A.T. Vermeltfoort ;
- Book Title / Journal: 15th International Brick and Block Masonry Conference, Florianópolis, Brazil
- Year: 2012 , Volume: , Series:
- Structure types ; Masonry Structures
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- Experimental assessment of the shear response of autoclaved aerated concrete (AAC) masonry with flat truss bed-joint reinforcement
- G. Magenes ; M Rota ; A. Penna ; M. Mandirola
- Book Title / Journal: 15th International Brick and Block Masonry Conference, Florianópolis, Brazil
- Year: 2012 , Volume: , Series:
- Structure types ; Masonry Structures
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- Non-linear equivalent frame modelling:- Assessment of a two storey perforated unreinforced masonry wall.
- C.L. Knox ; J.M. Ingham
- 2012 New Zealand Society of Earthquake Engineering Conference, Paper 076.
- Book Title / Journal:
- Year: 2012 , Volume: , Series:
- Structure types ; Masonry Structures
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- Assessment of a type of post-tensioned masonry walls system for dwelling construction in seismic prone areas
- A. Orduña ; C. Tula ; R. Licea
- Book Title / Journal: The 15th World Conference on Earthquake Engineering, Lisbon, Portugal, Paper No. 2958
- Year: 2012 , Volume: , Series:
- Structure types ; Masonry Structures
- Description
- This work reports the results of an experimental campaign on a type of dry jointed and prestressed masonry. The
campaign is part of a larger project with the main objective of to develop an innovative wall construction system
for economical dwelling in seismic prone areas of underdeveloped countries. The campaign tested 12 stack bond
prisms and 6 regular bond prisms, in order to measure the strength and Young modulus of the material under
axial compression and to observe the failure modes. Six wallets, postensioned in the head joints direction were
tested in order to determine the diagonal compression strength, the shear modulus, and to observe the failure
mode. Under these simple tests, the proposed material behaves adequately; in particular, the shear failure mode
presents a very large displacement capacity.
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- Three-Dimensional Analysis of Masonry Vaults Using Limit State Analyis With Finite Friction
- D.F. D'Ayala ; E. Tomasoni
- Book Title / Journal: International Journal of Architectural Heritage
- Year: 2011 , Volume: 2 , Series: 5
- Structure types ; Masonry Structures
- Keywords: vaults ; pavillion vaults ; Friction ; limit analysis ; Masonry Structures
- Description
- Within the past 20 years, a growing number of methods for the analysis of masonry vaults have been developed. However, most methods idealize the vaults as a system of many arches. This oversimplification could be admissible for barrel vaults and spherical domes under simple gravitational loads, but it cannot do justice to the three-dimensional effects developing 10 in other types of vaults, especially in complex vaults without smooth and continuous surface.
Moreover, although the results could be conservative for uniform load distributions, this model limits substantially the set of loading conditions that can be analyzed and hence
provide an accurate assessment of vaults performance. To clear this limitation, this article proposes a tool for three-dimensional analysis of masonry vaults. Using the lower bound 15 approach and taking into account the friction among block interfaces, the proposed analytical method may give a good indication of the actual surface of thrust within the framework of limit state analysis. Therefore, limit state analysis with finite friction is able to provide the crack pattern, the stress resultants and the horizontal thrust at the supports, important elements with regard to strengthening interventions. To show its simplicity and rigor, the procedure has been applied to pavilion vaults. The results obtained are validated by comparison with nonlinear finite element analysis and an application to a real case study is presented.
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- Numerical analysis of concrete block masonry beams under three point bending
- P.B. Lourenço ; G. Vasconcelos ; V.G. Haach
- Book Title / Journal: Engineering Structures, 33, 12, 3226-3237
- Year: 2011 , Volume: , Series:
- Structure types ; Masonry Structures
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- The development of a simplified modeling technique for the finite element analysis of reinforced masonry shear walls
- M.I. Abdellatef
- Book Title / Journal: M.Sc. Thesis
- Year: 2011 , Volume: , Series:
- Structure types ; Masonry Structures
- Keywords: shear walls ; Finite element analysis ; Masonry Structures
- Description
- Reinforced masonry shear walls are structural elements that are commonly used in construction. It is important to properly model their contribution to the strength and stiffness of the structures in which they appear. Analysts typically represent these shear walls with deep beam elements within building models. However, the assumption that a shear wall behaves as a deep beam breaks down when shear failure occurs, and cracking starts to dominate the behavior of the wall. There is a need to develop a finite element model of these shear walls that is accurate but simple enough to be included as a part of a full building model.
A 2-D masonry shear wall model was developed to meet these requirements. To make it
applicable within standard structural analysis software, the model does not require a detailed
representation of each component of the wall separately. Instead, the reinforcing is smeared and
overlaid with a plane stress masonry element. Plasticity is assumed for the steel and
cracking/damage is assumed for the masonry. Reductions in masonry stiffness were applied to
account for initial cracks, and artificial damping was added to stabilize the solution process after the
occurrence of masonry damage.
Data from two experimental test programs were used to verify the proposed modeling technique along with comparisons with detailed finite element models. It was found that the behavior of the simplified models was quite close to that of the detailed finite element models for all cases considered. When compared to the peak values of cyclic load of the experimental specimens, it was found that initial stiffness, peak load, and displacement at final failure were well predicted although, for short shear walls which are dominated by shear failure of the masonry, damage did not evolve as rapidly in the finite element models as was observed in the experimental specimens. The proposed modeling technique was therefore shown to reasonably predict reinforced masonry shear wall behavior, even with coarse meshing and smeared steel reinforcement, regardless of the wall aspect ratio, amount of axial vertical load applied to the wall, and reinforcement ratio.
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- Salt Crystallization Tests on Brick Masonry Reinforced by CFRP Textiles
- L. Binda ; C. Tedeschi ; M.R. Valluzzi ; E. Garbin ; M. Panizza
- Book Title / Journal: Proceedings of the International Conference on Durability of Building Materials and Components, Porto Portugal
- Year: 2011 , Volume: , Series:
- Structure types ; Masonry Structures
- Keywords: Brick masonry ; durability to salt solutions ; FRP repair
- Description
- Repair of historic masonry by Fiber Reinforced Polymers (FRP) systems is being more and more used especially in seismic areas. A rather great deal of experimental research on the mechanical behaviour of the repaired masonry has been carried out but very small experimental work has been done on the durability of FRP repairs when masonry is exposed to aggressive environments.
Carbon FRP (CFRP) have been applied on the surface of both soldier course and running bond
specimens respectively as bonds in thin vaults and in solid walls. A total number of 20 specimens have
been prepared and tested. A RILEM pre-standard procedure was followed for the evaluation of resistance to sulphates of the specimens. The damage evolution has been monitored by visual
observation and by quantification of material loss in the vertical section at each 4 week cycle and the
first results are here reported which show the importance of a carefulr application of FRPs.
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- Shake Table Testing of Scaled Geogrid-reinforced Adobe Wall Models.
- M. L. Worth J. F. Tipler ; Q. T. Ma
- 2010 NZSEE Conference, Paper Number 84.
- Book Title / Journal:
- Year: 2010 , Volume: , Series:
- Structure types ; Masonry Structures
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- Handmade clay bricks: Chemical, physical and mechanical properties
- F. Castro ; F.M. Fernandes ; P.B. Lourenço
- Book Title / Journal: International Journal of Architectural Heritage, 4, 1, 38-58
- Year: 2010 , Volume: , Series:
- Structure types ; Masonry Structures
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- Finite Element Analysis of Unreinforced Masonry Walls
- M. Mohammed
- Book Title / Journal: Al-Rafidain Engineering
- Year: 2010 , Volume: 18 , Series:
- Structure types ; Masonry Structures
- Keywords: Interface element ; Masonry Wall ; Nonlinear behavior
- Description
- In the present work nonlinear finite element program written in fortran language to simulate the behavior of masonry wall under the action of monotonic loading has been developed. The masonry is modeled as a two-phase material, treating bricks and mortar joints separately, thus allowing for nonlinear deformation characteristic and progressive local failure of both bricks and mortar joints. The influence of the mortar joint is taken into account by using an interface cap model as a part of a rational unit-joint model able to describe cracking, slipping and crushing of the material. The capabilities of the program have been examined and demonstrated by analyzing two different types of masonry wall. The accuracy of the analytical results was assessed by comparing them with the experimental results and shown to be good.
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- Simulation-based fragility relationships for unreinforced masonry buildings.
- T.F. Frankie
- M. SC Thesis, Civil & Environmental Eng, University of Illinois at Urbana-Champaign.
- Book Title / Journal:
- Year: 2010 , Volume: , Series:
- Structure types ; Masonry Structures
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