| 李世亚*,陈展标,周昊,姚国文,黄培彦.无横隔板空心薄壁高墩稳定性的实验研究[J].实验力学,2018,33(5):696~706 |
| 无横隔板空心薄壁高墩稳定性的实验研究 |
| Experimental study of the stability of hollow thin-walled high piers without transverse diaphragm |
| 投稿时间：2018-02-10 修订日期：2018-03-08 |
| DOI：10.7520/1001-4888-18-032 |
| 中文关键词: 空心薄壁高墩 横隔板 稳定性 缩尺模型 轴压实验 |
| 英文关键词:hollow thin-walled high pier transverse diaphragm stability reduced scale model axial compression experiment |
| 基金项目:国家重点研发计划项目(2017YFC0806000)、国家自然科学基金项目(11627802，51678249)、广东省交通运输厅科技计划项目(科技-2015-02-025)资助 |
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| 中文摘要: |
| 在山区公路建设中，空心薄壁高桥墩得到了广泛的应用。然而，横隔板会对空心薄壁高墩的施工进度造成较大的困难。针对空心薄壁高墩的横隔板设置问题，本文从稳定性分析入手，通过数值实验来设计有/无横隔板、不同宽厚比及壁厚条件的缩尺实验模型，对7个空心薄壁高墩缩尺模型实施轴压实验，探讨了模型墩的失稳破坏模式、受力和变形特性，以及可以不设置横隔板的判别条件，并与有限元计算结果进行了对比分析。研究结果表明，在满足本文提出的容许宽厚比的条件下，混凝土空心薄壁高墩可以不设置横隔板；采用墩底固结、墩顶自由的独立桥墩模型对空心薄壁墩的稳定性进行非线性分析的方法是可行的。 |
| 英文摘要: |
| Hollow thin-walled high bridge piers have been widely used in mountain highway construction. However, the transverse diaphragm has caused great difficulty to the construction progress of hollow thin walled high pier. In this paper, for setting problem of the transverse diaphragm of hollow thin-walled high piers, seven reduced-scale experiment models of the hollow thin-walled high piers with presence or absence of the transverse diaphragm, different ratio of width to thickness (b/t), and different wall thickness by numerical experiments to design obtained from the stability analysis. And then, axial compression experiments for seven reduced scale models were carried out, and the failure modes, stresses and deformation characteristics of the model piers, and the discriminant conditions which do not set the transverse diaphragm were discussed and compared with the finite element calculating results. Study results show that if the condition of proposed allowable ratio (b/t)max is satisfied, the transverse diaphragm would not be set in concrete hollow thin-walled high piers; The nonlinear analysis method is feasible to analyze the stability of the hollow thin-walled high piers with the independent bridge pier model which the bottom was fixed and the top was free. |
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