岩土力学Issue(1)：61-66,6.
柔性均布压力加载装置在模型试验中的应用研究
Research on application of flexible uniform pressure loading device to model test
摘要
Abstract
The developed flexible uniform pressure loading device and traditional rigid loading device are applied to large-scale geomechanical model test, of which loading effect is comparatively analyzed by using the stress nonuniformity coefficient. The test results show that, with the loading stress and the distance from the surface increasing, the stress nonuniformity coefficientdecreases, and stress distribution tends to uniform. Comparing to the rigid loading method, flexible uniform pressure loading device is more beneficial to uniform stress dispersion and forming uniform stress field. With the flexible uniform pressure loading device being applied to the test, the stress field is nearly uniform where the depth from the surface is 300 mm in the test condition;and theis 0.086 when the initial stress has been applied;and the correspondingis 0.283 with rigid loading method applied in the test. Even though the distance from the surface is short or the loading stress is low, the flexible uniform pressure loading device also produces a good uniform loading effect, and when the on-load pressure is 0.28 MPa, theis only 0.174 where the depth from the surface is 150 mm. The device has the function of reducing range of boundary effect and improving model test accuracy.关键词
刚性加载/柔性均布压力加载装置/模型试验/应力不均匀系数/对比分析Key words
rigid loading/flexible uniform pressure loading device/model test/stress nonuniformity coefficient/comparative analysis分类
建筑与水利引用本文复制引用
李术才,王琦,李为腾,李智,王洪涛,江贝,张红军..柔性均布压力加载装置在模型试验中的应用研究[J].岩土力学,2014,(1):61-66,6.基金项目
国家自然科学基金青年科学基金项目(No.51304125)；高等学校博士学科点专项科研基金(No.20130131120090)；山东省优秀中青年科学家科研奖励基金(No. BS2013NJ004)。 （No.51304125）
