| 钢-混组合连续梁负弯矩区受力性能研究及实用新型装置 |
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| 引用本文： | 李聪. 钢-混组合连续梁负弯矩区受力性能研究及实用新型装置[J]. 公路工程, 2021, 0(1): 18-22,80 |
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| 作者姓名： | 李聪 |
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| 作者单位： | 湖南省交通规划勘察设计院有限公司 |
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| 基金项目： | 国家实用新型专利(ZL202020299636.1)。 |
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| 摘 要： | 钢-混组合梁桥体系在市政桥梁工程中近年得到了广泛应用,尤其是钢-混组合连续梁桥.在正弯矩区混凝土桥面受压,钢梁受拉,能充分发挥材料的优势;但在负弯矩区,混凝土桥面受拉会引起裂缝问题.综合使用超高性能混凝土、预应力技术、调整桥面板施工顺序、有效运用支点顶升法,提出了一种新型装置来控制钢-混组合连续梁负弯矩区拉应力和裂纹....
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| 关 键 词： | 钢-混组合梁 连续梁 负弯矩区 支点顶升 实用新型装置 |
A Utility Model Device for Steel-concrete Continuous Composite Beams Under Negative Bending |
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| LI Cong. A Utility Model Device for Steel-concrete Continuous Composite Beams Under Negative Bending[J]. Highway Engineering, 2021, 0(1): 18-22,80 |
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| Authors: | LI Cong |
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| Affiliation: | (Hunan Provincial Communications Planning,Survey&Design Institute Co.,Ltd.Changsha,Hunan 410200,China) |
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| Abstract: | Recently,the steel-concrete composite beam bridge has been widely used in municipal bridge engineering,especially the continuous composite beam bridge.In positive bending regions,the concrete deck is compressed and the steel beam is tensed,while in negative bending regions,the concrete deck is tensed,which will generate cracks.In this paper,a new device is proposed to control the tensile stress in the concrete decks of composite continuous beams under negative bending.The device combines ultra-high performance concrete,prestressing technology,construction sequence adjustment and the fulcrum lifting method.The finite element results have verified the effect of the device. |
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| Keywords: | steel-concrete composite beam negative bending regions fulcrum lifting utility model device |
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