混凝土柱子采用外包刚加固时应符合哪些构造要求

2025-03-26 02:45:33
推荐回答(1个)
回答1:

混凝土柱子采用外包刚加固时应符合的构造要求如下:

       1、包钢加固的外包角钢的边长不宜小75mm;缀板截面不宜小于25mm×3mm,间距不允许大于20r(r:是单个角钢截面的最小回转半径),同时不宜大于500mm。
       2、包钢加固的外包角钢需通长、连续,在穿过各个楼层楼板时不能截断;角钢下端应伸到建筑结构基础顶面,用环氧砂浆或环氧胶泥来粘接锚固;角钢上端应留有足够的锚固长度,可能时上端设置与角钢焊接的柱帽。
       3、当采用环氧树脂胶外包钢加固时,连接板应紧贴混凝土表面,并与角钢水平焊连接,焊好后,用环氧将型钢周围封闭,并留出气孔,再进行灌浆。
       4、当采用乳胶水泥砂浆粘贴外包钢时,缀板可焊于角钢外面。乳胶含量应不少于5%。
       5、乳胶含量应不少于型钢表面宜抹不小于25mm厚的1:3水泥砂浆保护层,亦可采用防腐材料加以保护。


相关内容:

       混凝土柱子漏振加固处理方法:
       柱子混凝土严重漏振,影响了主要结构构件受力,对整体结构安全造成很大的隐患。为彻底解决这一质量问题,根据现场实际测试情况、柱子损伤程度和部位情况,制定了以下处理方案:
       (1)对于柱子根部出现漏振且存在烂根现象的部位,先将疏松的混凝土剔除,采用水泥压力灌浆法处理内部缝隙,然后用无收缩灌浆料浇注平整。待灌浆料强度达到C30以上后,柱子根部粘贴环型100mm宽、300g的碳纤维布进行补强。
       (2)对于柱子非根部部位,先将疏松的混凝土剔除,然后用无收缩灌浆料浇注平整。待灌浆料强度达到C30以上后,在出现漏镇范围内(竖向净距100mm)粘贴环型100mm宽、300g碳纤维布进行补强。

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