Behavior of Reinforced Sand Bed Under Repeated Loading
摘要
Geogrid-reinforced soil is widely used in machine foundations, seismic mitigation, roads, and railway infrastructure projects etc., The present study investigates the influence of geogrid-reinforcement on the dynamic response of sand beds through laboratory tests. The response of the reinforced sand beds is compared to that of unreinforced sand beds to evaluate the effectiveness of reinforcement in enhancing the dynamic performance of the footing. Commercially available biaxial geogrids made up of polypropylene material having a square aperture are used in the experimental investigation. The effect of reinforcement distribution parameters like spacing between the reinforcement (S) and the reinforcement layer number (N) are used as the testing parameters. The experimental results are presented in terms of load cycles v/s settlement curves and also represented in the form of non-dimensional parameters Cyclic Resistance Ratio (CRR) and Settlement Ratio (SR). The experimental results provide valuable insight into the role of geogrid reinforcement in enhancing the dynamic characteristics of sand beds. The CRR increased, and the SR reduced with the increase in reinforcement layer numbers and reduced reinforcement spacing. The results demonstrated that reinforcement distribution parameters significantly influence the performance of Geogrid-reinforced sand beds. These findings contribute to the development of optimized designs for structures subjected to dynamic loading events, thereby advancing the understanding and engineering practice in this field.