| 地下埋管可靠度校准分析 |
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| 引用本文： | 何英明,侯建国,安旭文,傅金筑,干城,蒋锁红.地下埋管可靠度校准分析[J].武汉大学学报(工学版),1999(5). |
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| 作者姓名： | 何英明 侯建国 安旭文 傅金筑 干城 蒋锁红 |
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| 作者单位： | 武汉水利电力大学土木与建筑工程学院!湖北武汉430072(何英明，侯建国，安旭文)，西北勘测设计研究院!陕西西安710001(傅金筑，干城，蒋锁红) |
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| 摘 要： | 应用《水工统标》推荐的一次二阶矩法，对现行《水电站压力钢管设计规范（ＳＤ１４４ － ８５）》中的地下埋管进行了可靠度水平校准分析．介绍了地下埋管在正常工作情况下的荷载及荷载效应的统计特征、影响地下埋管抗力的因素和各因素的统计参数；分析计算了Ａ３ 和１６ Ｍｎ 钢管在不同荷载效应比和不同围岩承载率时的可靠指标β；讨论了现行规范地下埋管的可靠度水平；提出了地下埋管可靠度低于明管较多，在修订规范时宜适当提高的建议．可供地下埋管设计和修订规范时参考．
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| 关 键 词： | 压力钢管 可靠度 荷载效应 结构抗力 |
Reliability analysis of underground penstock |
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| HE Ying ming\ ,HOU Jian guo\ ,AN Xu wen\ ,FU Jin zhu\ ,GAN Cheng\ ,JIANG Suo hong\.Reliability analysis of underground penstock[J].Engineering Journal of Wuhan University,1999(5). |
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| Authors: | HE Ying ming\ HOU Jian guo\ AN Xu wen\ FU Jin zhu\ GAN Cheng\ JIANG Suo hong\ |
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| Affiliation: | HE Ying ming\ 1,HOU Jian guo\ 1,AN Xu wen\ 1,FU Jin zhu\ 2,GAN Cheng\ 2,JIANG Suo hong\ 2 |
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| Abstract: | Based on the method of first order second moment recommended by 《Unified design standard for reliability of hydraulic engineering structures》, the reliability of underground penstock in 《Design Code for Penstock in hydropower plants (SD 144-85)》 are calibrated and analyzed. The statistics of load effects of underground penstock on normal condition and factors affecting the structural resistance are presented. The reliability indices β of penstock made of A3 steel and 16Mn steel, undergoing different raio of load effect and percentage of load carrying of surrounding rock, are calculated. The reliability level of underground penstock in current code is discussed. Because the reliability of underground penstocks are much lower than that of exposed penstocks, this paper suggests that it should be increased while evising code. These research achievements provide a scientific basis for the design of underground perstock and the revision of 《Design Code of Penstock》. |
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| Keywords: | penstock reliability load effect structural resistance |
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