Rothoblaas - 木螺钉和连接器 Page 198
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计算示例： 利用与纹理垂直的压缩力的横梁加固 项目数据 B = 220 mm F v,Rd = 158 kN a = 25 mm 应用等级 = 1级 a2,c Fc,90,Rd = 158 kN H = 560 mm L a = 200 mm a2,c 荷载持续时间 = 中间值 Gl24h 木 (ρk = 385 kg/m3) a2 B a1,c Fv,Rd a1 H Fc,90,Rd a La 检查支撑的剪切力 (EN 1995:2014) : τd ≤ fv,d τd = τd 1,5 Fv,Rd B H fv,k = 1,92 N/mm2 = 3,50 N/mm2 EN 1995:2014 k mod = 0,8 γM = 1,25 fv,d = 2,24 N/mm2 意大利 - NTC 2018 k mod = 0,8 γM = 1,45 fv,d = 1,93 N/mm2 τd ≤ fv,d τd ≤ fv,d 1,92 < 2,24 N/mm2 验证通过 1,92 < 1,93 N/mm2 验证通过 检查没有加固的梁-撑上的垂直压缩力 (EN 1995:2014) : σc,90,d ≤ kc,90∙ fc,90,d lef,1 = 255 mm lef,1 = La + a + 30 σc,90,d = σc,90,d= 2,82 N/mm2 kc,90 = 1,75 Fv,Rd B lef,1 fc,90,k = 2,50 N/mm2 EN 1995:2014 k mod = 0,8 γM = 1,25 fc,90,d = 1,60 N/mm2 σc,90,d ≤ kc,90∙ fc,90,d 意大利 - NTC 2018 k mod = 0,8 γM = 1,45 fc,90,d = 1,38 N/mm2 2,82 < 2,80 N/mm2 验证未通过 需要加固 198 | VGS | 木结构 σc,90,d ≤ kc,90∙ fc,90,d 2,82 < 2,41 N/mm2 验证未通过 需要加固
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