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框架预应力锚杆边坡锚固结构的随机地震反应及动力可靠度分析

, PP. 26-33

Keywords: 道路工程,边坡,虚拟激励法,框架预应力锚杆,动力计算模型,随机地震反应,动力可靠度

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Abstract:

?为了简化框架预应力锚杆边坡锚固结构随机地震反应分析和动力可靠度计算方法,提高计算效率,采用虚拟激励法对锚杆边坡锚固结构进行了随机地震反应分析,获得了框架预应力锚杆边坡锚固结构的地震反应功率谱,给出了改进的动力可靠度计算方法,进行了工程实例验证,并将提出的方法与Monte-Carlo法进行了比较。结果表明:提出的分析模型物理概念明确,是一种快速、精确、实用的分析方法,为框架预应力锚杆边坡锚固结构的随机地震反应分析与动力可靠度计算奠定了理论基础,并提供了一种新的计算途径;随机地震反应随着坡高逐渐增大,在坡中上部达到极值,锚固结构的动力响应峰值随着可靠度指标的增大而增大。

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