| 外露型钢锚箱索塔锚固结构受力机理试验 |
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| 引用本文： | 徐海军,刘玉擎,李炀,郑双杰.外露型钢锚箱索塔锚固结构受力机理试验[J].同济大学学报(自然科学版),2014,42(5):0672-0676. |
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| 作者姓名： | 徐海军 刘玉擎 李炀 郑双杰 |
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| 作者单位： | 同济大学 土木工程学院，上海 200092；同济大学建筑设计研究院(集团)有限公司，上海 200092;同济大学 土木工程学院，上海 200092;同济大学 土木工程学院，上海 200092;同济大学 土木工程学院，上海 200092 |
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| 摘 要： | 通过缩尺比例为1∶2的节段模型试验,揭示了外露型钢锚箱索塔锚固结构的受力机理,重点分析了塔壁预应力在结构中的作用效应.研究结果表明:外露型钢锚箱索塔锚固结构在中小跨径桥梁中具有较好的适用性;在塔壁不开裂的情况下,预应力不会改变水平索力在钢锚箱和混凝土塔壁之间的分配关系;预应力能够明显减少塔壁混凝土的拉应力,提高塔壁的抗裂性能,但也会降低钢板的利用率和增大焊钉剪力顺桥向作用的剪力.
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| 关 键 词： | 组合桥 索塔锚固结构 受力机理 模型试验 外露型 |
| 收稿时间： | 6/5/2013 12:00:00 AM |
| 修稿时间： | 2014/1/23 0:00:00 |
Experimental Study on Stress Mechanism of Exposed Steel Anchor Box Cable tower Achorage |
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| XU Haijun,LIU Yuqing,LI Yang and ZHENG Shuangjie.Experimental Study on Stress Mechanism of Exposed Steel Anchor Box Cable tower Achorage[J].Journal of Tongji University(Natural Science),2014,42(5):0672-0676. |
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| Authors: | XU Haijun LIU Yuqing LI Yang and ZHENG Shuangjie |
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| Institution: | College of Civil Engineering, Tongji University, Shanghai 200092, China;Tongji Architectural Design (Group) Co. Ltd., Shanghai 200092, China;College of Civil Engineering, Tongji University, Shanghai 200092, China;College of Civil Engineering, Tongji University, Shanghai 200092, China;College of Civil Engineering, Tongji University, Shanghai 200092, China |
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| Abstract: | This paper, based on a model experiment of 1/2 reduced scale, reveals the stress mechanism of exposed steel anchor box cable tower anchorage and analyzes the effect of the prestress. The results show that the exposed steel anchor box cable tower anchorage is suitable for the cable stayed bridge of small span. In the condition of no crack occurred in the concrete tower wall, prestress does not change the distribution of the horizontal cable force between the steel anchor box and the concrete tower wall. Prestress can obviously reduce the tensile stress of concrete tower wall and then improve the performance in crack resistance. However, prestress will also reduce the ratio of utilization of steel anchor box and add the shearing force of studs. |
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| Keywords: | composite bridge cable tower anchorage stress mechanism model test exposed steel anchor box |
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