ACI 307-23 PDF下载

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Requirements for Reinforced Concrete Chimneys—Code and Commentary ACI CODE 307-23 PDF Download

《钢筋混凝土烟囱技术规范与条文说明》 ACI 307-23 PDF下载

– **适用对象**:60 m 及以上钢筋混凝土烟囱,含套筒、多筒、塔架式布置。
– **设计方法**:极限状态法,叠加风、地震、温度、腐蚀、疲劳五类极限状态。
– **荷载体系**:同步采用 ASCE/SEI 7-22 最新地震与风荷载,新增涡激共振检算。
– **温度效应**:给出线性温差简化公式与非线性有限元双路径,控制裂缝 ≤ 0.25 mm。
– **耐久性条款**:按烟气酸腐蚀等级选用高性能混凝土,水胶比 ≤ 0.40、氯离子渗透 ≤ 1000 C。
– **配筋构造**:环向配筋率 0.4 % 起,竖向钢筋接头位置错开 1.3 倍搭接长度,确保强震韧性。
– **施工验收**:引入“烟囱专用混凝土温控指标”与“环向预应力张拉记录表”,实现全过程可追溯。
– **条文说明**:详解高耸结构风洞试验、长期徐变收缩、温度疲劳机理,提供抗震等级选取表与维护策略。

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