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高桩码头是我国广泛采用的重要结构形式之一,其构件多、结构复杂,容易出现损伤或破坏,因此其安全性一直受到普遍关注。该文在查阅和整理了国内外关于可靠性评价的一系列标准、规范以及研究人员对结构可靠度安全等级划分等工作成果的基础上,用结构整体极限承载力表征体系的抗力,计算结构的可靠指标;依据关于结构安全分级标准的相关规范,反推得到相应的结构目标可靠指标,从而建立了基于整体可靠指标的高桩码头安全度定量分级方法。此外,按照不同可变荷载组合对该分级标准进行了讨论,并得出了一些基本规律。以某高桩码头为例,采用该文提出的高桩码头整体安全度定量分析与分级方法,对该结构破损后的安全度进行评估,结果与工程实践结论相一致。
Piled wharf is one of the most important structural forms widely used in our country. Its components are many and its structure is complex, so it is prone to damage or damage. Therefore, its safety has been paid attention to all the time. On the basis of reviewing and finishing a series of domestic and international standards and norms on reliability evaluation and the researchers’ achievements on safety grade classification of structural reliability, this paper uses the structural ultimate capacity to characterize the resistance of the system and calculate the structural According to the relevant norms of structural safety classification standards, the corresponding reliability index of structure target can be obtained by back-estimation, so as to establish the method of quantitatively grading the safety of high-pile wharf based on the overall reliability index. In addition, the classification criteria are discussed according to different combinations of variable loads, and some basic rules are obtained. Taking a piled wharf as an example, this paper presents a quantitative analysis and classification method for the overall safety of the piled wharf, and evaluates the safety of the structure after it is damaged. The result is consistent with the engineering practice.