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本文给出了各种常用钢筋的锚固极限状态方程。在此基础上,根据我国钢筋、砼材料和构件几何尺寸的统计参数,按照所确定的锚固强度和锚固刚度可靠指标,求得了各种情况下所需的钢筋锚固、搭接和延伸长度。本文分析了现行规范的锚固可靠度水平和主要影响因素,最后提出了可靠度比较一致的、简单实用的关于锚固、搭接和延伸长度设计取值的建议,为工程设计提供了依据。
In this paper, the anchorage limit state equations of various common steel bars are given. On this basis, according to the statistical parameters of the geometric dimensions of steel bars, concrete materials and components in China, and according to the determined anchorage strength and reliable index of anchorage stiffness, the required anchorages, overlaps and extension lengths of the steel bars under various conditions were obtained. This paper analyzes the current specification of the anchorage reliability level and the main influencing factors. Finally, it proposes a simple and practical advice on the reliability of anchorage, overlap and extended length design values, which provides a basis for engineering design.