摘要
根据QSY-GJX-0135-2008埋地管线穿越强震区管道应变设计方法,结合目前国内外工程可靠性设计规范,提出了一种基于应变设计的管道抗震可靠度直接计算方法。该方法综合考虑了地震荷载作用和管道材料本身材料性能的不确定性,建立了管道在地震作用下的应变极限状态方程,研究不同地震烈度下,不同管道径厚比的管道可靠度指标变化规律,给出管道可靠性评估。结果表明:管道径厚比的变化对管道的安全性有着显著影响,相同地震烈度下,管道可靠度指标随着管道径厚比的增加呈指数减小;地震烈度越高,地震效应越大,管道的可靠度指标越低;基于应变设计的管道抗震可靠度计算方法,实现了管道在地震作用下的管道可靠度定量描述,符合工程实际,能够为科学、合理地进行管道抗震设计提供一定的计算依据。
Combined with the current reliability design method in domestic and international norms and the strain design of pipelines which crossing meizoseismal areas in the QSY-GJX-0135-2008,a direct caculation method about pipe aseismic reliability was presented based on the strain design. This method based on strain design method,comprehensively considers the uncertainty of seismic load and the material properties of the pipeline,the strain limit state equation of the pipeline under the seismic effect was established,aims to study the variation of the reliability index of the pipeline under different seismic intensity and pipe diameter thickness ratio,to evaluate the reliability of the pipeline. The result show that determine changes in pipe diameter thickness ratio have a significant impact on the safety of the casing. Under the same seismic intensity,the reliability index of the pipeline decreases exponentially with the increase of the pipe diameter thickness ratio. The higher seismic intensity,the greater seismic effect,the lower reliability index of pipeline. caculation method about pipe aseismic reliability based on the strain design realize the quantitative description of the pipeline reliability seismic effect. It is conform to engineering practice and is able to provide a scientific and reasonable caulation basis for pipeline seismic design.
出处
《科学技术与工程》
北大核心
2016年第23期181-184,194,共5页
Science Technology and Engineering
基金
国家自然科学基金(51274231,51374228,U1262208)
中国石油天然气集团公司课题(2014A-4214)资助
关键词
应变设计
地震作用
可靠度指标
统计参数
径厚比
strain design
seismic action
reliability index
statistical parameter
diameter thickness ratio
