GRS bridge abutments under cyclic lateral push
| Autor: | S. Vidhyalakshmi, M. Ramalakshmi |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
010302 applied physics
Passive resistance medicine.medical_treatment Constitutive equation Abutment 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Finite element method Geogrid Lateral earth pressure 0103 physical sciences medicine Dilation (morphology) Geotechnical engineering 0210 nano-technology Bridge (dentistry) Geology |
| Zdroj: | Materials Today: Proceedings. 43:1089-1092 |
| ISSN: | 2214-7853 |
| DOI: | 10.1016/j.matpr.2020.08.325 |
| Popis: | During earthquakes, the bridge abutments can undergo large displacements that are required to develop high passive earth pressures behind the abutment walls. In the present study, a finite element (FE) model of a Geogrid Reinforced Soil (GRS) wall has been developed to study the passive earth pressure induced under cyclic lateral loading. An advanced constitutive model has been used as VUMAT to characterize the soil elements. Uniform lateral displacement is applied to the abutment wall. Pushing and pulling of the wall is repeatedly done with small increments of lateral displacement towards the soil in each cycle. The loading is continued until the passive resistance of the soil doesn't increase much or stands almost at the same value. The improvement in the pushover capacity because of the provision of reinforcement is about four times that of the unreinforced abutment. Well compacted backfills show a peak capacity, which then decreases to a residual capacity with further push, indicating the dilation of the dense backfill. Whereas the relatively less compacted backfills attain a maximum capacity after being compacted more due to the initial intruding movement of the wall. |
| Databáze: | OpenAIRE |
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