RCSC A348-20W PDF下载

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RCSC Specification for Structural Joints Using High-Strength Bolts a348-20w PDF download

美国《高强度螺栓结构连接规范》 PDF下载

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该规范由 RCSC 的 A.1-Specifications 委员会编制,并经全体理事会批准,全文共 118 页,主要适用于 ASTM A325、A490 及其等效扭剪型(F1852、F2280)高强度螺栓在钢结构连接中的设计、安装与检验。

章节关键要点
1. 适用范围仅适用于钢材的高强度螺栓连接;不适用于锚栓或非钢材料连接。
2. 螺栓组件允许使用经认证的涂层(锌铝无机涂层、机械镀锌等),但需满足过拧及匹配组件要求。
3. 设计方法同时给出 LRFD 与 ASD 两套设计公式,抗力系数 φ=0.75(LRFD),安全系数 Ω=2.00(ASD)。
4. 强度计算剪拉强度均按毛截面面积 Ab 及表 5.1 的 Fn 取值;若夹有 >¼ in 填板需折减 Fn 或采用“滑移临界”连接。
5. 安装与检查区分“ snug-tightened ”、“ pre-tensioned ”、“ slip-critical ”三类节点;对存储、润滑、分批张拉及检验记录提出详细要求。
6. 混合连接同一剪切面内高强度螺栓与角焊缝并用时,需按 AISC 360-22 第 11.8 节特殊规定执行。
RCSC A348-20W PDF下载
RCSC A348-20W PDF下载

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