水电站埋式输水钢管抗内压可靠性及经济性研究
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摘要
将随机可靠度理论与规范设计方法相结合,建立了水电站埋式钢管抗内压可靠度的计算模型。利用该计算模型,分析埋式输水钢管与围岩间缝隙、围岩弹性抗力系数、水锤比对埋式输水钢管抗内压可靠性及经济性指标的影响。分析结果表明,上述各项指标均能满足水电站埋式输水钢管抗内压所必须的既安全可靠又经济实用的要求。对研究课题的提出背景、影响埋式输水钢管抗内压安全的不确定性因素分析、埋式输水钢管抗内压可靠度模型的研制以及实际算例分析等,作了较详细的介绍。
The theory of random reliability and the code design method are integrated to establish a model for reliability calculation of embedded steel water pipe under internal pressure.By the model,the influences of the gap between steel pipeline and surrounding rock,the elastic resistance coefficient of surrounding rock,the water-hammer pressure ratio on the reliability against internal pressure and economy of pipe are analyzed.The analysis results show that all the abovementioned indexes meet the requirements of safety,reliability and economical application.The background of the subject,analysis of uncertain factors influencing the safety of embedded steel water pipe under internal pressure,development of reliability model and case studies are introduced in detail.
The theory of random reliability and the code design method are integrated to establish a model for reliability calculation of embedded steel water pipe under internal pressure.By the model,the influences of the gap between steel pipeline and surrounding rock,the elastic resistance coefficient of surrounding rock,the water-hammer pressure ratio on the reliability against internal pressure and economy of pipe are analyzed.The analysis results show that all the abovementioned indexes meet the requirements of safety,reliability and economical application.The background of the subject,analysis of uncertain factors influencing the safety of embedded steel water pipe under internal pressure,development of reliability model and case studies are introduced in detail.
引文
[1]马文亮,陈学茂,谢巍,等.龙滩水电站埋藏式加劲压力钢管稳定性校核[J].人民长江,2007,39(1):39-41.
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[6]中华人民共和国水利部.SL279-2002水工隧洞设计规范[S].北京:中国水利水电出版社,2002.
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[8]马文英,等.地震荷载动力分析与工程结构可靠度设计原理[M].北京:中国水利水电出版社,2009.
[2]中华人民共和国水利部.SL281-2003水电站压力钢管设计规范[S].北京:中国水利水电出版社,2003.
[3]李增坤.巨型水电站地下输水钢管运行期可靠度研究[J].人民长江,2011,43(13):44-47.
[4]李国强,等.工程结构荷载与可靠度设计原理(第3版)[M].北京:中国建筑工业出版社,2005.
[5]何英明.地下埋管可靠度校准分析[J].武汉水利电力大学学报,1999,(10):64-68.
[6]中华人民共和国水利部.SL279-2002水工隧洞设计规范[S].北京:中国水利水电出版社,2002.
[7]安旭文,侯建国,何英明,等.水电站压力钢管明管的可靠度校准分析[J].武汉大学学报:工学版,2003,(6):31-35.
[8]马文英,等.地震荷载动力分析与工程结构可靠度设计原理[M].北京:中国水利水电出版社,2009.
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