Behavior of a Stiff Clay behind Embedded Integral Abutments
Behavior of a Stiff Clay behind Embedded Integral Abutments
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嵌入式整体基台后面的硬粘土的行为
DOI：
10.1061/(asce)1090-0241(2007)133:6(721
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发表时间：
2007
期刊：
影响因子：
--
通讯作者：
C. Clayton
中科院分区：
文献类型：
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作者：
Ming Xu;A. Bloodworth;C. Clayton
与传统桥梁相比，整体式桥梁可以显著降低维护和维修成本。然而，由于桥台后面的土体经历了温度诱导的循环荷载，设计中出现了不确定因素。本文介绍了埋入式整体基牙后硬粘土行为的实验程序的结果。在典型的整体式桥台上，典型的整体式桥台可能会对其保留的土体施加应力路径和循环应变水平。结果表明，温度的日变化和年变化都会引起桥台后水平应力的显著变化。然而，对于这种典型的刚性粘土，侧向土压力并没有随着循环次数的增加而增加，其应力-应变特性和刚度特性也没有受到连续循环的影响。讨论了计算结果对整体桥台设计的影响。
Integral bridges can significantly reduce maintenance and repair costs compared with conventional bridges. However, uncertainties have arisen in the design as the soil experiences temperature-induced cyclic loading behind the abutments. This paper presents the results from an experimental programme on the behavior of a stiff clay behind embedded integral abutments. Atherfield Clay specimens were subjected to the stress paths and levels of cyclic straining that a typical integral bridge abutment might impose on its retained soil. The results show that daily and annual temperature changes can cause significant horizontal stress variations behind such abutments. However, no increase in lateral earth pressure with successive cycles was observed for this typical stiff clay, and the stress-strain behavior and stiffness behavior were not influenced by continued cycling. The implications of the results for integral abutment design are discussed.