| Popis: |
Anchors group system, whose spacing and edge distance could not meet the requirements of the code, were tested. Based on the test, the finite element models involving geometric and materials nonlinearity were presented. The finite element analysis (FEA) were proved to be reasonable by comparing the results of FEA to the results of test. Anchors systems of spacing and edge distance from 2d to 9d,under tension load were simulated. It turned out that, the maximum bearing capacity of anchors group system was achieved when the spacing and edge distance were 8d, which was 40% bigger than the one of 5d. The minimum bearing capacity of anchors system was obtained when the spacing and edge distance were 3d, for the destroyed areas of concrete of adjacent anchors overlaped. Anchors group system of spacing and edge distance smaller than 5d still could be used through reducing the ultimate bearing capacity by a factor γsc. The formula ofγsc was obtained through numerical analysis method. |
