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首页> 外文会议>International Symposium on Structural Engineering for Young Experts; 20060818-21; Fuzhou amp; Xiamen(CN) >Method for Controlling Concrete Crack in Negative Moment Regions of Continuous Steel-concrete Composite Beam Bridge
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Method for Controlling Concrete Crack in Negative Moment Regions of Continuous Steel-concrete Composite Beam Bridge

机译：连续钢-混凝土组合梁桥负弯矩区域混凝土裂缝的控制方法

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摘要

Lishuiqiao segment of light railway Line 5 in Beijing is a large-span continuous steel-concrete composite beam bridge. To prevent the incoming of concrete cracks in negative moment areas of the bridge, jacking up mediate supporting location and preloading heavy static load as well as pretension of high-strength bars were adopted into a new controlling method, which made construction processing more complex. So the paper performed both numerical simulation analysis and real time monitoring during the construction to determine the effectiveness of new method and ensure the quality and safety of the whole construction courses. Numerical results agree well with test results, which illustrated that finite element analysis can simulate real construction process of bridge construction successfully. Additionally, concrete in negative moment areas of this continuous composite beam bridge has been imposed sufficient compressive stress through the new method. Moreover, preloading static heavy weight has significant effect on the inner force of the steel beam.
机译：北京轻轨五号线水桥段是一座大跨度连续钢-混凝土组合梁桥。为防止混凝土裂缝在桥的负弯矩区域出现，采用了一种新的控制方法，即抬高中间支撑位置并预载重的静载荷以及高强度钢筋的预紧力，这使施工过程更加复杂。因此，本文在施工过程中进行了数值模拟分析和实时监控，以确定新方法的有效性，并确保了整个施工过程的质量和安全性。数值结果与试验结果吻合较好，表明有限元分析可以成功模拟桥梁施工的实际过程。另外，通过该新方法，该连续复合梁桥的负弯矩区域中的混凝土已施加了足够的压应力。此外，预加载静态重物对钢梁的内力有重要影响。

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