Pullout force/displacement relationship of extensible grid reinforcements

✍ Scribed by Dennes T. Bergado; Jin-Chun Chai

• Book ID: 103640896
• Publisher: Elsevier Science
• Year: 1994
• Tongue: English
• Weight: 1018 KB
• Volume: 13
• Category: Article
• ISSN: 0266-1144
• DOI: 10.1016/0266-1144(94)90025-6

✦ Synopsis

A model for predicting the pullout resistance of polymer-grid reinforcement has been proposed. The influence of bearing member rigidity and spacing ratio (S/D) are explicitly expressed in the hyperbolic model. A new bearing capacity equation is incorporated for calculating the maximum pullout force. The displacement along the reinforcement is calculated by using the proposed pullout bearing resistance model together with the elongation of the grid longitudinal member. The validity of the method is confirmed by good agreement between calculated values and actual test data. The analytically determined effective reinforcement embedment lengths (i.e. the length of the reinforcement in tension) and pullout displacement to mobilize the desired pullout resistance of polymeric grids under different backfill conditions and under different applied normal pressures, provide useful information for the design of reinforced earth structures against pullout failure. c Ca d d. NOTATION Cohesion Adhesion Unit length Displacement for mobilizing maximum skin friction resistance 295