00518542

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Formulation for lateral resistance of lightweight thrust restraint considering elongation of geogrid

English (英語)

神戸大学都市安全研究センター研究報告

11

367-376

神戸大学都市安全研究センター

2007-03

2008-07-09

In bends of pressure pipelines, thrust forces are generated due to internal pressure. Concrete blocks are installed at the bends to resist the thrust forces. However the concrete blocks will be weak points during earthquakes. In our previous study, a lightweight thrust restraint using geogrids and an anchor plate was proposed. In addition, the advantage of the proposed thrust restraint was verified by laboratory model tests and full-scale tests, and the resistance mechanism was examined by numerical analyses. Based on the failure mechanism, the maximum lateral resistance was evaluated by solving equations for the force equilibrium. In the present study, the lateral resistance of the proposed method was formulated considering the elongation of the geogrid. In addition, the calculated results were compared with the experimental results in order to verify the accuracy of the proposed formula Furthermore parametric studies were performed to examine the influence of variations conditions on the lateral resistance. As results, it was clarified that the lateral resistance can be evaluated by the proposed formula, and the stiffness of the geogrid and the width of the anchor plate significantly influenced on the lateral resistance.

lateral resistance

紀要論文