【摘要】 设计并完成了大型加筋格宾挡墙模型试验。试验模型尺寸为3.0 m×0.85 m×2.0 m(长×宽×高),填料采用工程现场用红砂岩材料制备。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。通过输入不同幅值和频率的正弦波激励,探讨重复荷载作用下模型挡墙的动力特性与动力响应规律。试验结果表明,加筋格宾挡墙在重复荷载作用200万次下,挡墙内外部未出现明显的局部和整体破坏,其结构具有良好的稳定性和抗破坏性。当振动频率达到10 Hz时,加筋格宾挡墙的竖向、水平加速度和竖向、水平位移反应变化极大。试验结果有助于揭示挡墙在重复荷载作用下的失稳机制。更多还原

【Abstract】 A large-scale model test of reinforced gabion walls was designed and performed.The model wall filled with red sandstone for construction was built with a length of 3.0 m,height of 2.0 m,and width of 0.85 m.PVC-coated heavy galvanized double twisted hexagonal wire mesh was used in the test,and the wire mesh specimens were 80 mm×100 mm cell sizes.A series of tests were performed with different input sine wave frequencies and amplitudes.The dynamic characteristics and dynamic responses of model wall under cyclic loading were discussed.The results show that(1) the inside and outside of reinforced gabion wall under two million times repeated loads does not appear significant local and overall damage,the structure is stable and anti-destructive;(2)when the vibration frequency reaches 10 Hz,there are great changes of vertical and horizontal acceleration and displacement response of the reinforced gabion wall.The results are helpful to reveal the mechanism of reinforced gabion wall’s instability under cyclic loading.更多还原