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中文摘要：
断层是造成埋地管线破坏的最重要原因。简化埋地管线小变形段为等效边界弹簧,对管材为三折线本构模型的等效边界弹簧本构方程进行了推导。基于ANSYS软件的有限元概率设计系统,考虑了管线外径、壁厚、内压、埋深及走滑断层位错量等随机输入变量,运用蒙特卡罗方法进行了软土、中等土、硬土3种场地走滑断层位错作用下钢质埋地管线的可靠性分析。研究发现：管线应变和失效概率随场地硬度提高显著增大,而应力增大不明显;三种场地走滑断层位错作用下,对应变的敏感性从高到底依次为走滑断层位错量、壁厚、埋深、内压。研究完善和丰富了该方面理论,为埋地管线抗震设计提供了一些合理且经济的建议。
英文摘要：
Fault movements represent the most severe earthquake effects on buried pipeline. The small deformation section of pipeline is simplified as an equivalent boundary spring, and its constitutive equation is deduced for tri- linear constitutive model of pipe materials. Based on the finite element probabilistic design system provided by AN- SYS software, the reliability analysis of buffed steel subjected to strike-slip fault is performed in soft, general and hard soil sites by Monte Carlo method considering the random input variables, including diameter and thickness of pipeline, internal pressure, buried depth and displacement of strike-slip faults. It is found that with the increase of site hardness, the strain and the failure probability of pipeline increase significantly, but the stress does not in- crease obviously. The sensitivity analysis indicates that the influential degrees of the parameters on the strain from high to low are displacement of strike-slip faults, thickness of pipeline, buried depth and internal pressure in three different sites. The research improves the theory of this aspect, and provides some reasonable and economic advice for seismic design of buried pipeline.
同期刊论文项目
同项目期刊论文
Experimental Studies on Seismic Performance of Subsidiary Piers of Long-Span Cable-Stayed Bridge wit
Study on Dynamic Characteristics of Long Span Continuous Bridge from Construction to Completion Cons
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