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Rinforzo di pannelli in muratura con griglie in materiali compositi immerse in matrici cementizie

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Shear failure of pultruded FRP composites under axial compression

Thomas Keller, Yu Bai

When structural elements are subjected to compressive loads, the shear forces and stresses induced by second- order effects may lead to shear failure prior to compressive failure. This is particularly likely to occur in the case of pultruded glass fiber-re ...

2009

Preparation and characterization of dense nanohydroxyapatite/PLLA composites

Jacques Lemaître, Sandrine Gay, Saioa Arostegui Aristimuno

Synthetic bone graft substitutes based on PLLA have been largely studied during the past decade. PLLA/hydroxyapatite composites appear as promising materials for large bone defect healing. In this study dense PLLA/nano-hydroxyapatite composites were prepar ...

2009

Shear strength in one- and two-way slabs according to the critical shear crack theory

Aurelio Muttoni, Miguel Fernández Ruiz

Currently, there is no generally-accepted theory giving a physical explanation of the shear strength in one- and two-way slabs. Furthermore, for members without transverse reinforcement, shear strength is estimated in most codes of practice following empir ...

fib Symposium, Amsterdam 20082008

Shear strength of thin-webbed post-tensioned beams

Aurelio Muttoni, Miguel Fernández Ruiz

This paper investigates the load-carrying mechanisms and the strength of thin-webbed, post-tensioned beams failing by crushing of the web. The shear strength in these members is significantly reduced because of the state of cracking in the web and because ...

ACI Structural Journal2008

Shear strength of reinforced concrete bridge deck slabs

Rui Vaz Rodrigues

Reinforced concrete bridge deck slabs without shear reinforcement can be subjected to concentrated or distributed loads of important magnitude. Under these loads their structural response is not always ductile. In particular under concentrated loads their ...

EPFL2007

Assembly of microvalves actuated by PZT bender

Jacques Jacot, Thomas Maeder, Yannick Sébastien Fournier, Frank Seigneur

At small sizes, piezoelectric bending actuators are more practical and have more favorable downscaling properties than traditional electromagnets in the field of microfluidics. However, their application is limited by the difficulty of ensuring proper clam ...

2007

Seismic behavior of lightly reinforced concrete squat shear walls

Christian Greifenhagen

This thesis addresses the seismic evaluation of existing buildings. In particular, it focuses on the seismic behavior of lightly reinforced shear walls that are not designed to withstand earthquake actions. A shear strength envelope for the assessment of d ...

EPFL2006

Shear strength of URM walls retrofitted using FRP

Pierino Lestuzzi, Marc Badoux, Mohamed Elgawady

This paper compares different models currently used to calculate the shear strength of unreinforced masonry (URM) walls retrofitted using fiber reinforced polymers (URM-FRP). The shear strengths of six recently tested URM-FRP walls were compared to shear s ...

Elsevier2006

Shear Strength of RC Bridge Deck Cantilevers

Rui Vaz Rodrigues

An experimental and theoretical investigation of the shear strength of reinforced concrete slabs without shear reinforcement is under way at the Ecole Polytechnique Fédérale de Lausanne. The first part of the program consists of 6 tests on two large scale ...

6th International PhD Symposium in Civil Engineering, IBK Publikation SP-0152006

Joining Wood by Friction Welding - Fabrication of Multi- layered Components

Yves Weinand, Bernhard Stamm

Since decades traditional friction welding methods are applied industrially to metal and thermoplastic synthetics. Research showed that for different applications this method is promising for wood too. The process does not necessitate any additional materi ...

2006