PASSIVE PRESSURE DEVELOPMENT IN MASONRY ARCH BRIDGES
PASSIVE PRESSURE DEVELOPMENT IN MASONRY ARCH BRIDGES
复制标题
砌体拱桥的被动压力发展
DOI：
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发表时间：
2002
期刊：
影响因子：
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通讯作者：
M. Davies
中科院分区：
文献类型：
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作者：
P. Burroughs;T. Hughes;S. C. Hee;M. Davies
本文考虑了砌体拱桥破坏过程中侧向被动压力的发展。一段时间以来，人们已经知道这些桥梁的摇摆破坏机制会产生显著的稳定土压力，但用于桥梁评估的定量数据在很大程度上仍然未知，特别是对于深拱。本文考虑了在英国发现的两种典型结构的几何形状的压力，一种是跨度/上升= 4，另一种是半圆形。实验在土工离心机中进行，采用1/12比例的6米单跨三环砖砌拱门模型。结果证实了早期的工作，即没有达到完全的被动压力极限；然而，很明显，对于所测试的土壤类型，在所有监测地点都达到了极限土壤压力。提出了一种用于拱桥评估的被动压力剖面，并将其应用于两座试验桥梁的评估。
This paper considers the development of lateral passive pressures during the failure of masonry arch bridges. It has been known for some time that the sway failure mechanism of these bridges develops significant stabilising soil pressures but quantitative figures for use in bridge assessment remain largely unknown, particularly for deep arches. This paper considers the pressures developed for two geometries typical of the range of structures found in the UK, one of span/rise = 4 and the other semicircular. The experiments were performed in a geotechnical centrifuge using 1/12th scale models of a 6 m, single-span, three-ring, brickwork arch. The results confirm earlier work suggesting that full passive pressure limits are not reached; however, it is clear that for the soil type tested limiting soil pressures at all monitored locations were achieved. A passive pressure profile is postulated for arch bridge assessment and application of the profile to the assessment of the two bridges tested is undertaken.