Centrifugal Model Tests on Earth Pressure and Displacement of Adaptive Anchorage for Suspension Bridges
Based on a trial design scheme of an adaptive anchorage foundation for a bridge over the Huangpu River in Shanghai,centrifuge model tests were conducted on an adaptive anchorage foundation buried in sandy soil.The distribution of the lateral earth pressure and displacement of the anchorage under the main cable tension were studied,and the influence of eccentric filling on the stability and displacement of the anchorage was revealed.The results indicated that the anchorage exhibited a rotational displacement pattern around a point below the toe of the foundation under the tension of the main cable.The side near the anchor point was subjected to active earth pressure,whereas the side far from the anchor point was subjected to passive earth pressure.The difference in earth pressure on both sides provided a certain horizontal resistance.The displacement mode for an anchor-aged foundation buried in sandy soil under the tensile force of the main cable was mainly the rotational mode,whereas the contribution of the rigid horizontal displacement to the overall displacement of the anchorage was relatively small.Eccentric filling significantly reduced the horizontal displacement of the anchorage,which was beneficial for improving antioverturning stability and displacement control.These conclusions provide reference values for the theoretical analysis and engineering design of adaptive anchorage foundations.
bridge engineeringadaptive anchoragecentrifuge model testearth pressurehori-zontal displacementeccentric filling
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