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首页> 外文期刊>Transportation Research Record >Strength of Spandrel Walls in Masonry Arch Bridges
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Strength of Spandrel Walls in Masonry Arch Bridges

机译：砌体拱桥中流墙的强度

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Previous research on the strength of masonry arch bridges has focused on the carrying capacity of the arch barrel in the span direction. Although the results of a spandrel wall collapse may be very serious, the transverse strength of masonry arch bridges has not been widely addressed. Recent experience, however, has shown that the transverse behavior and the strength of the spandrel walls are at least as important as the behavior in the span direction. Although complex computer analysis methods have been proposed for examining the masonry arch bridge as a three-dimensional structure, these methods are not suitable for everyday practical application. An approximate analytical method for the prediction of the strength of masonry spandrel walls is developed based on the conventional analysis of fills supported by retaining walls. The method is based on the determination of loads by Coulomb-Rankine analysis and the determination of resistance by the fracture line method, similar to the yield line method for reinforced concrete slabs. A table that further increases the simplicity and speed of the method is also provided. The proposed method allows the practicing engineer to calculate a factor of safety for the transverse strength of a spandrel wall for different situations, such as moist soil, cracked wall, effect of live load for shallow fill bridges, or existence of parapet walls. Results of these conventional, simplified analyses compare favorably with observed bridge distress and results of a previously validated finite element analysis method.
机译：先前关于砌体拱桥强度的研究集中在拱跨度方向上的拱管承载能力。尽管拱形墙倒塌的结果可能非常严重，但砌体拱桥的横向强度尚未得到广泛解决。然而，最近的经验表明，翼展壁的横向行为和强度至少与翼展方向上的行为同等重要。尽管已经提出了复杂的计算机分析方法来检查砌体拱桥的三维结构，但这些方法并不适合日常实际应用。基于对挡土墙支撑的填充物的常规分析，开发了一种预测砖砌墙的强度的近似分析方法。该方法基于库仑-朗肯分析法确定荷载和断裂线法确定阻力，与钢筋混凝土板的屈服线法相似。还提供了进一步提高该方法的简便性和速度的表格。所提出的方法使执业工程师能够针对不同情况（如潮湿的土壤，开裂的墙，对浅层填充桥梁的活荷载的影响或护墙的存在）计算跨度墙的横向强度的安全系数。这些常规的简化分析结果与观察到的桥梁应力和先前验证的有限元分析方法的结果相比具有优势。

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