水平地震作用下加筋格宾挡土墙动力特性试验研究

Dynamic characteristics of reinforced gabion walls subjected to horizontal seismic loading

通过大型的模型试验,研究了以红砂岩为填料在水平地震作用下加筋格宾挡土墙的动力特性。双绞合六边形金属格宾网由PVC包裹,并镀锌防腐,网面单元尺寸为80 mm×100 mm。输入地震波采用ELCE_NS地震波和HACHI_EW地震波,峰值分别为0.342g和0.183g。试验得出了加筋格宾挡墙在不同峰值的水平地震激励下的第一层、第三层、第五层墙顶面处的水平加速度、竖向加速度、水平动位移、竖向动位移峰值响应和沿墙高方向动应力峰值响应。通过对加筋格宾挡土墙的结构分析和抗震试验,可以得出加筋格宾挡土墙为优良的抗震结构,这为加筋格宾挡土墙的抗震设计提供依据。

Large model tests are conducted on reinforced gabion walls filled with red sandstone under horizontal seismic loading to investigate the dynamic response of walls. PVC-coated heavy galvanized of double twisted hexagonal wire mesh is used in the tests, and the cells of wire mesh specimens have a dimension of 80 mm×100 mm. Input seismic waves are ELCE_NS and HACHI_EW, and the peaks are 0.342g and 0.183g respectively. The horizontal acceleration, vertical acceleration, dynamic horizontal displacement, dynamic vertical displacement, and dynamic stress peaks response of the first layer, the third layer, the fifth layer of reinforced gabion walls are achieved in the model tests under different peaks of horizontal earthquake incentives. The reinforced gabion walls are proved to be excellent aseismatic structures by the structural analyses and aseismatic experiments. The test results provide a reasonal basis for the aseismatic design of reinforced gabion walls.