| 预应力格构梁基底反力分布规律模型试验研究 |
| |
| 引用本文： | 韩冬冬,门玉明,梁炜.预应力格构梁基底反力分布规律模型试验研究[J].工程地质学报(英文版),2015,23(5):976-981. |
| |
| 作者姓名： | 韩冬冬 门玉明 梁炜 |
| |
| 作者单位： | 长安大学地质工程与测绘学院 西安 710054 |
| |
| 基金项目： | 国土资源大调查项目(1212011220145)资助 |
| |
| 摘 要： | 针对现有格构梁内力计算方法中对梁底反力研究的不足,通过1:2比例尺的大型物理模型试验,分析研究了预应力格构梁基底反力的分布规律。分析结果表明:格构梁基底反力分布不均匀,横梁基底反力为结点大、跨中小; 竖梁基底反力为上部小、下部大,呈梯形分布,且随着坡顶加载量的增加,这种趋势越加明显; 预应力阶段各横梁基底反力相等,滑坡发展阶段各横梁基底反力呈上小下大梯形分布; 竖梁各跨土压力均值与对应横梁均值存在一定比例关系,其比例系数范围为0.4~0.6; 格构梁角结点基底反力最大,边结点次之,中结点最小,比例关系为2.15:1.15:1.00。
|
| 关 键 词： | 滑坡防治 预应力 格构梁 基底反力 模型试验 |
| 收稿时间： | 2014-09-11 |
MODEL TEST STUDY ON CONTACT PRESSURE OF PRESTRESSED ANCHOR LATTICE BEAM |
| |
| Institution: | College of Geology Engineering and Geomatics, Chang'an University, Xi'an 710054 |
| |
| Abstract: | This paper examines the deficiency in research about the contact pressure of current lattice beam internal force calculation methods. It carries out the study of a 1:2 large-scale physical model test and analyzes the distribution of foundation counterforce. The result indicates that the distribution of beam contact pressure is not uniform. For horizontal beam, the foundation counterforce near node is stronger than that in the middle segment of the beam. For vertical beam, the reaction appears to be a trapezoidal distribution with top weaker and this trend is more obvious with the loading. The contact pressure of each horizontal beam is equal in prestressing stage while it appears a distribution as the vertical beam in landslide developing stage. There is a certain proportion relationship between the span reaction of vertical beams and that of the corresponding horizontal beam span. The coefficient of proportionality is between 0.4 and 0.6. The reaction force is all different among the angle node, the edge node and the center node. It is the strongest at the angle node. The edge node comes the second. The center node weakest. Their proportions are 2.15:1.15:1.00. |
| |
| Keywords: | |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《工程地质学报(英文版)》浏览原始摘要信息 |
| 点击此处可从《工程地质学报(英文版)》下载免费的PDF全文 |
|
