Mechanical behavior of timber-concrete slabs under real environmental conditions by experimental and numerical approaches

2011 ◽  
Vol 15 (5) ◽  
pp. 773-786 ◽  
Author(s):  
Eric Fournely ◽  
Sebastian Fuentes ◽  
Mustapha Taazount
Keyword(s):  
Mechanical Behavior ◽  
Environmental Conditions ◽  
Concrete Slabs ◽  
Numerical Approaches

scholarly journals Influence of crosslinking on the mechanical behavior of 3D printed alginate scaffolds: Experimental and numerical approaches

2018 ◽  
Vol 80 ◽  
pp. 111-118 ◽  
Author(s):  
Saman Naghieh ◽  
Mohammad Reza Karamooz-Ravari ◽  
MD Sarker ◽  
Eva Karki ◽  
Xiongbiao Chen
Keyword(s):  
Mechanical Behavior ◽  
3D Printed ◽  
Numerical Approaches

scholarly journals Long-Term Efficiency of Two Organic Corrosion Inhibitors for Reinforced Concrete

2010 ◽  
Vol 636-637 ◽  
pp. 1059-1064 ◽  
Author(s):  
E.V. Pereira ◽  
R.B. Figueira ◽  
Manuela M. Salta ◽  
I.T.E. Fonseca
Keyword(s):  
Reinforced Concrete ◽  
Environmental Conditions ◽  
Corrosion Inhibitors ◽  
Electrochemical Techniques ◽  
Concrete Structures ◽  
Concrete Slabs ◽  
Reinforced Concrete Structures ◽  
Reinforcement Corrosion ◽  
Organic Corrosion Inhibitors

In this paper the efficiency of two organic corrosion inhibitors, a migratory and an admixture inhibitor, was evaluated by electrochemical techniques in solutions simulating the interstitial electrolyte of concrete and on concrete slabs exposed to natural environmental conditions over a five-year period. From obtained results, the usefulness of the two products is discussed aiming its application in new structures to prevent chlorides induced corrosion and as a curative method for repairing reinforced concrete structures contaminated with chlorides and affected by reinforcement corrosion.

Brief Analysis on the Mechanical Behavior Influenced by Opening Locations of the Unbonded Prestressed Concrete Slabs

2011 ◽  
Vol 243-249 ◽  
pp. 774-778
Author(s):  
Ling Zhi Jin ◽  
Hong Mei Zhou ◽  
Qiang Fu ◽  
Xiao Jie Zhou ◽  
Yu Lin Xie
Keyword(s):  
Mechanical Behavior ◽  
Bearing Capacity ◽  
Prestressed Concrete ◽  
Concrete Slab ◽  
Ultimate Bearing Capacity ◽  
Hole Drilling ◽  
Concrete Slabs ◽  
Uniform Load ◽  
Yield Line Theory ◽  
Line Theory

The unbonded prestressed concrete slabs is usually used in big span high-rise buildings. Due to the existence of stairs, elevators, piping shafts and washroom etc，（hole drilling is usually encountered in the floor of unbonded prestressed concrete structures）, which weakens the rigidity of concrete slab, and it has different influences on the slabs with openings in different locations. Based on the contrast experiments of the unbonded prestressed concrete slab with openings in different locations subjected to uniform load, this thesis investigates and analyzes mechanical behavior of the unbonded prestressed concrete slabs with openings in different locations (central，around edge and corner) subjected to uniform load. Using the yield-line theory to calculate the ultimate bearing capacity of pre-stressed slabs with openings, and comparing from experimental results to theoretical ones, this paper puts forward some conclusions of how different opening locations impact the ultimate bearing capacity of pre-stressed slabs with openings

Mechanical Behavior Analysis of the Unbonded Prestressed Concrete Slabs with Openings Strengthened by Different Methods

2010 ◽  
Vol 163-167 ◽  
pp. 1354-1358
Author(s):  
Xia Cao ◽  
Ling Zhi Jin ◽  
Qiang Fu ◽  
Hong Mei Zhou ◽  
Ya Qiong Liu ◽  
...  
Keyword(s):  
Experimental Data ◽  
Mechanical Behavior ◽  
Bearing Capacity ◽  
Prestressed Concrete ◽  
Concrete Slabs ◽  
Uniform Load ◽  
Yield Line ◽  
Yield Line Theory ◽  
Line Theory ◽  
Lift Off

Based on the contrast experiments of unbonded prestressed concrete slabs with openings subjected to uniform load strengthened by different methods, this paper investigates and analyzes the appearance and the development of cracks, deflections, bearing capacity of the unbonded prestressed concrete slabs that are with strengthening steel and with hidden beams. According to the experimental failure mode of the slabs, prestressed concrete slabs with openings by yield line theory considering the conditions to enhance the contribution of hidden beam and the strengthening steel. Compared with the experimental data, this paper puts forward some bearing capacity lift-off effect of the slabs under different strengthened methods.

scholarly journals Exterior Wood-Concrete Slabs, Experimentation and Modeling of Mechanical Behavior: Part 1

2015 ◽  
Vol 14 (2) ◽  
pp. 86-90
Author(s):  
Álvaro Peña ◽  
Sebastián Fuentes ◽  
Eric Fournely ◽  
Benjamín Navarrete ◽  
Hernán Pinto
Keyword(s):  
Mechanical Behavior ◽  
Concrete Slabs ◽  
Exterior Wood

scholarly journals Influence of Crosslinking on the Mechanical Behavior of 3D Printed Alginate Scaffolds: Experimental and Numerical Approaches

2018 ◽  
Author(s):  
Saman Naghieh ◽  
Mohammad Reza Karamooz-Ravari ◽  
Md Sarker ◽  
Eva Karki ◽  
Xiongbiao Chen
Keyword(s):  
Mechanical Properties ◽  
Elastic Modulus ◽  
Mechanical Behavior ◽  
Three Dimensional ◽  
Decisive Role ◽  
Element Model ◽  
Tissue Scaffolds ◽  
3D Bioprinting ◽  
3D Printed ◽  
Numerical Approaches

Tissue scaffolds fabricated by three-dimensional (3D) bioprinting are attracting considerableattention for tissue engineering applications. Because the mechanical properties of hydrogelscaffolds should match the damaged tissue, changing various parameters during 3D bioprintinghas been studied to manipulate the mechanical behavior of the resulting scaffolds. Crosslinkingscaffolds using a cation solution (such as CaCl2) is also important for regulating the mechanicalproperties, but has not been well documented in the literature. Here, the effect of variedcrosslinking agent volume and crosslinking time on the mechanical behavior of 3D bioplottedalginate scaffolds was evaulated using both experimental and numerical methods. Compressiontests were used to measure the elastic modulus of each scaffold, then a finite element model wasdeveloped and a power model used to predict scaffold mechanical behavior. Results showed thatcrosslinking time and volume of crosslinker both play a decisive role in modulating the mechanicalproperties of 3D bioplotted scaffolds. Because mechanical properties of scaffolds can affect cellresponse, the findings of this study can be implemented to modulate the elastic modulus ofscaffolds according to the intended application.

scholarly journals Numerical Characterization of Behavior Under Uniaxial Tension and Modelling of Bending of Mechanical Behavior of Polymeric Materials (HIPS) And Comparison with Experience

2021 ◽  
Vol 229 ◽  
pp. 01053
Author(s):  
Meryem Baha ◽  
Amal Lamarti ◽  
Rachid Sehaqui ◽  
Abdelilah Hachim ◽  
Siham Ouhimmou
Keyword(s):  
Mechanical Behavior ◽  
Uniaxial Tension ◽  
Environmental Conditions ◽  
Polymeric Materials ◽  
High Impact ◽  
Bending Stress ◽  
High Impact Polystyrene ◽  
Numerical Characterization

Considering the wide use of high impact polystyrene in different fields, it is important to know its behavior in different environmental conditions. This work is interested in the characterization of the behavior of high impact polystyrene (HIPS) under tensile and bending stress.

Towards an Expert System that Aids in the Diagnosis of Concrete Structures

2011 ◽  
Vol 61 ◽  
pp. 1-8
Author(s):  
Ali Messabhia ◽  
Naceur Hassounet
Keyword(s):  
Expert System ◽  
Mechanical Behavior ◽  
Knowledge Base ◽  
Environmental Conditions ◽  
Concrete Structures ◽  
Complex Matter

The concrete works, during their exploitation are exposed to operation or environmental conditions which can inflict certain degradations to them. Establishing a good diagnosis needs a particular knowledge of the behavior of concrete when exposed to aggressive agents, especially the mechanical behavior. The determination of the causes of degradation is a complex matter and the interaction between different pathologies makes it more difficult. The choice of the materials and techniques used to repair the damages is also very important to succeed in the intervention. Our objective is the development of a knowledge base which will be used as a base to formulate the rules used to organize, rationalize and optimize the diagnosis process of these pathologies. The knowledge base gathers the majority of known phenomena related to the degradation of the concrete works. It is organized according to a reasoning which enables to describe or to identify most damages and degradations of chemical or mechanical origins or of implementation. Used with an expert system it will enable us to evaluate the importance of the damage, the need to intervene and finally to propose recommendations about the appropriate procedures and materials needed to repair the damage.

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