鋼結(jié)構(gòu)課程設(shè)計(jì)計(jì)算書-展示頁(yè)
2025-06-16 18:16本頁(yè)面
【正文】 /????2 = 215 /????2 所選截面合適 ④ 4桿截面設(shè)計(jì) 平面內(nèi)計(jì)算長(zhǎng)度 = 平面外計(jì)算長(zhǎng)度 = 選用與 1桿相同截面，用實(shí)際截面驗(yàn)算 A = 2 = ??2 = ?? = 12???? = ?? 6 = = 4 7. = = = 4 7. = 150 1 = 16 1 = 16 1= 4 7 16 = = 1 (1 2 2 14) = 16 (1 4 7 2 1 2 16 4) = ( ) = ， φ = ????3φA = 1 3 .387 1 2 = /????2 = 215 /????2 所選截面合適 ⑤ 1桿截面設(shè)計(jì) 平面內(nèi)計(jì)算長(zhǎng)度 = 平面外計(jì)算長(zhǎng)度 = / = 1 若獲得等穩(wěn)定條件 = ，則 / 1，選用兩不等肢角鋼短 肢相并 設(shè) λ =110，查上冊(cè)附表 A17 得： φ = A = ????1φf(shuō) = 1 3 .493 215 1 2 = ??2 = = 2 11 = ??， 應(yīng)大于 = 2 11 = ?? 選用 2∟ 100 63 10并由短肢相并構(gòu)成壓桿，查得： A = 2 = 31 ??2 = ?? = 12???? = ?? 用實(shí)際截面驗(yàn)算 = = 2 5. 9 = = = 2 = 150 1 = 1 1 = 10 1= 2 1 = = = ( ) = ， φ = 7 ????1φA = 1 3 .464 31 1 2 = /????2 = 215 /????2 所選截面合適 ⑥ 2桿截面設(shè)計(jì) 平面內(nèi)計(jì)算長(zhǎng)度 = 平面外計(jì)算長(zhǎng)度 = 選用與 1桿相同截面，用實(shí)際截面驗(yàn)算 A = 2 = 31 ??2 = ?? = 12???? = ?? = = = = = = 150 1 = 1 1 = 10 1= 25 1 = 14 = = ( ) = ， φ = ????2φA = 1 3 .33 31 1 2 = /????2 = 215 /????2 所選截面合適 ⑦ 3桿截面設(shè)計(jì) 平面內(nèi)計(jì)算長(zhǎng)度 = 平面外計(jì)算長(zhǎng)度 = 選用與 2桿相同截面，用實(shí)際截面驗(yàn)算 A = 2 = ??2 = ?? = 12???? = ?? = ????3A = 1 1 2 = /????2 = 215 /????2 = = 3 = 350 所選截面合適 上弦桿截面設(shè)計(jì) 8 4桿內(nèi)力最大， 選取 4桿進(jìn)行截面設(shè)計(jì) = 18 6(g q)( )2 = 18 6 ( 588) 32 = 節(jié)間和節(jié)點(diǎn)處彎矩為 = = = 選用 2∟ 200 125 10并由長(zhǎng)肢相并 A = 2 = ??2 1 = 2 = ??3， 2 = 2 15712 。 = ??3 = ?? = 12???? = ?? 1 = 2 = = = 3 = 150，查得： = = 2
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