Application of Stepped Isothermal Method for Prediction the Creep Behavior of Extruded Polypropylene Geogrid

2015 ◽  
Vol 725-726 ◽  
pp. 611-616 ◽  
Author(s):  
Valeria Grebneva ◽  
Ksenia Utkina ◽  
Mohanad Sabri ◽  
Oleg Stolyarov
Keyword(s):  
Tensile Strength ◽  
Creep Behavior ◽  
Civil Engineering ◽  
Soil Reinforcement ◽  
Experimental Measurements ◽  
Engineering Applications ◽  
Support Structure ◽  
Isothermal Method

Geogrids are designed to be a support structure in geotechnical and civil engineering applications. Geogrids manufactured with the extrusion of a polymer must posses the necessary level of tensile strength and low creep. In this paper, a study on application of stepped isothermal method for prediction of creep behavior of extruded polypropylene geogrid used for soil reinforcement was carried out. On the basis of the obtained data, a possibility of creep prediction for structures with geosynthetics for periods of time much longer than experimental measurements was demonstrated.

scholarly journals Bond between Concrete and Multi-Directional CFRP Laminates

2010 ◽  
Vol 133-134 ◽  
pp. 917-922 ◽  
Author(s):  
José Sena-Cruz ◽  
Joaquim Barros ◽  
Mário Coelho
Keyword(s):  
Carbon Fiber ◽  
Civil Engineering ◽  
Fiber Reinforced Polymers ◽  
Structural Elements ◽  
Engineering Applications ◽  
Carbon Fiber Reinforced Polymers ◽  
Reinforced Polymers ◽  
Cfrp Laminate ◽  
Cfrp Laminates ◽  
Pullout Tests

Recently, laminates of multi-directional carbon fiber reinforced polymers (MDL-CFRP) have been developed for Civil Engineering applications. A MDL-CFRP laminate has fibers in distinct directions that can be arranged in order to optimize stiffness and/or strength requisites. These laminates can be conceived in order to be fixed to structural elements with anchors, resulting high effective strengthening systems. To evaluate the strengthening potentialities of this type of laminates, pullout tests were carried out. The influence of the number of anchors, their geometric location and the applied pre-stress are analyzed. The present work describes the carried-out tests and presents and analyzes the most significant obtained results.

Reinforcement Possibilities of Round Timber Bolted Joints

2014 ◽  
Vol 1082 ◽  
pp. 359-364
Author(s):  
Kristýna Klajmonová ◽  
Antonín Lokaj
Keyword(s):  
Tensile Strength ◽  
Civil Engineering ◽  
Bolted Joints ◽  
Steel Plates ◽  
Mechanical Reinforcement ◽  
With Screws ◽  
Test Result ◽  
Round Timber ◽  
Rate Of Improvement

In this article the results of round timber bolted joints with inserted steel plates tests are presented. First, unreinforced round timber specimens were tested. Mechanical reinforcement by using modified washers, steel bands, BOVA plates and boost with screws of round timber specimens based on test result was then proposed. Reinforced specimens of various densities were then tested and rate of improvement in tensile strength was established for each of five proposed reinforcement methods. Tests were carried out on EU100 pressure machine in Faculty of Civil Engineering of VŠB-TUO Ostrava.

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