doimiy yuklarni hisoblash

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1363790523_42628.doc www.arxiv.uz reja: 1. ballast korita plitasining mustahkamlikka hisobi 2. ballast korita plitasining chidamlilik buyicha yuk koâ´tarish sinfini aniqlash 3. ballast korita plitasining chidamlilik buyicha yuk koâ´tarish sinfini aniqlash qovurgâalari orasidagi uchastkada hisobiy uzunlik oraligâida aniqlanadigan, eni 1 m li plitaning xususiy ogâirligi [image: image1.wmf]; / 1 ) ( 1 1 ' ã¤ f ã¤ p a h a h a p g ã ã + = (1.55) rr = (1,5(0,16+0,24(0,08)(1(25/1,5 = 4,3 kn/m. plitaning tashqi konsolida [image: image2.wmf]g d g bt bt f p h h p 2 1 ' + ã ã = , (1.56) bunda ( = 25 kn/m3 â temirbetonning solishtirma ogâirligi (1-ilova, 7-jadval). hisobiy uzunlik oraligâida yoâl qismlari bilan ballast ogâirligidan sodir boâlgan oârtacha yuk: â qovurgâalar orasidagi uchastkada [image: image3.wmf]b b b h p g ã ã = 1 ' = 0,65(1(20 = 13 kn/m; (1.57) â plitaning tashqi konsolida pb = [(ltâct)h [image: …

mage9.wmf]0 , 1 10 14 10 05 , 9 10 190 3 4 3 1 ã ã ã ã ã = = - b r a r x b s s = 0,0122 m ( as = 0,026 m. [image: image10.png] 1.8-rasm. plitani mustahkamlikka hisoblashda hisobiy sxema nisbiy balandlikning chegaraviy qiymati (r = [image: image11.wmf]) 145 , 0 545 , 4 ( 0001 , 0 1 008 , 0 85 , 0 b s b r r r - + - = = [image: image12.wmf]) 14 145 , 0 545 , 4 ( 190 0001 , 0 1 14 008 , 0 85 , 0 ã - ã + ã - = 0,704. (1.59) x1 = 0,0122((rho = 0,704(0,134 = 0,094 m. chegaraviy eguvchi moment m1 = rbbx1 (hoâ0,5x1) = = 14(103(1,0(0,0122(0,134 â 0,5(0,0122) = 21,9 knm. (1.60) â kesim 2â2 (1.2 va 1.8,a-rasmlarga q.). choâziladigan armatura 8d12mm, as = …

7,a-rasmga q.). koâprik oâqi boâyicha muvaqqat yukning tarqalish uzunligi [6,b. 4.3] lo = b+( [image: image25.wmf]' +( [image: image26.wmf]' ' lo = 1,8+1,1+0,8 = 3,7 m. (1.63) plitaning yonma-yon qirralari orasidagi monolit uchastka uchun doimiy yukdan sodir boâlgan eguvchi moment [image: image27.wmf]; 8 / ) ( 2 ' p b p p p p l p n p n m + = (1.64) bunda lp = 1,5 m â qovurgâalar ichki qirralari orasidagi masofa. ruxsat etilgan muvaqqat yuk [6,b. 4.3] [image: image28.wmf]p m = (1,1(4,3+1,2(13)1,52/8 = 2,87 knm. [image: image29.wmf], ) ( 8 2 2 1 p k m p o bl n m m m l k h - + = (1.65) bunda b = 1 m â plitaning hisobiy eni (1.8,a-rasm). [image: image30.wmf]2 5 , 1 1 15 , 1 325 , 1 ) 87 , 2 6 , 35 9 , 21 ( 7 , 3 8 …

0,5(0,193) â â 14(103(70(10â4(0,21 = 34,63 knm. (1.69) doimiy yukdan sodir boâlgan eguvchi moment quyidagi formuladan aniqlanadi [6,b. 4.3] z = 0 va pbt = 0 boâlganda, [image: image36.wmf]2 0 2 '2 2 () ()() 222 1,50,98,60,9 0,5()1,10,71,551,5(1,550,9) 22 0,51,210,650,98,55,213,7. kbtkk pptbtttkp pbb lllllz mnplzpzpllzp nplz knm ã©ã¹ -+- ã¦ã¶ã¦ã¶ =-+-+--++ ãªãº ã§ã·ã§ã· ã¨ã¸ã¨ã¸ ã«ã» ã©ã¹ ++ +-=ã+-++ ãªãº ã«ã» +ããã=+= (1.70) ruxsat etilgan muvaqqat yuk [image: image37.wmf]2 2() 2(3513,7)3,7 199,5. ()0,851,151,0(0,90) po mk mml kknm nbz h - - === d-ãã- (1.71) eguvchi moment boâyicha mustahkamlikka hisoblashdan 3â3 kesimda plita tashqi konsolining sinfi [6,b. 1.4] k = [image: image38.wmf]43 , 1 3 , 26 5 , 199 1 ) 1 ( ã ã = + m y h k k = 5,32. koândalang kuch boâyicha mustahkamlikka hisoblash 2â2 va 3â3 kesimlarda bajariladi (1.2-rasm): â kesim 2â2. chegaraviy koândalang kuch [6,b. 4.5] q = 0,75rbtbho= 0,75(1,0(103(1,0(0,214 = 160,5 kn. (1.72) …

ka hisoblashdan plita tashqi konsolining sinfi [image: image45.wmf]. 2 , 10 43 , 1 3 , 26 383 1 ) 1 ( = ã ã = + = m y h k k k ballast korita plitasining chidamlilik buyicha yuk koâ´tarish sinfini aniqlash hisob 1â1, 2â2, 3â3 kesimlarda bajariladi (1.2-rasm): â kesim 1â1. doimiy yukdan sodir boâladigan eguvchi moment [6,b. 2.3] mr = a(rr+rb)l [image: image46.wmf]2 ñ = 0,0625(4,3+13)1,52 = 2,43 knm. (1.77) muvaqqat yukdan sodir boâladigan eguvchi moment [6,b. 2.3] [image: image47.wmf]o m a k l b l ak m / 2 ' q h = = 0,0625(199,5(1,52(1,325( (0,89(1,0/3,7 = 8,95 knm, (1.78) bunda 1a = 1r = 1,5 m â plitaning yonma-yon qirralar orasidagi monolit uchastkasi uchun, a0 = 0,0625 â 1â1 kesim uchun; k' = 199,5 kn/m â ballast korita plitasini mustahkamlikka hisoblashda olingan ruxsat etilgan muvaqqat yukning minimal qiymati. beton uchun kuchlanish sikli asimmetriyasi (b = …

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1363790523_42628.doc www.arxiv.uz reja: 1. ballast korita plitasining mustahkamlikka hisobi 2. ballast korita plitasining chidamlilik buyicha yuk koâ´tarish sinfini aniqlash 3. ballast korita plitasining chidamlilik buyicha yuk koâ´tarish sinfini aniqlash qovurgâalari orasidagi uchastkada hisobiy uzunlik oraligâida aniqlanadigan, eni 1 m li plitaning xususiy ogâirligi [image: image1.wmf]; / 1 ) ( 1 1 ' ã¤ f ã¤ p a h a h a p g ã ã + = (1.55) rr = (1,5(0,16+0,24(0,08)(1(25/1,5 = 4,3 kn/m. plitaning tashqi konsolida [image: image2.wmf]g d g bt bt f p h h p 2 1 ' + ã ã = , (1.56) bunda ( = 25 kn/m3 â temirbetonning solishtirma ogâirligi (1-ilova, 7-jadval). hisobiy uzunlik oraligâida yoâl qismlari bilan ballast ogâirligidan sodir boâlgan oârtacha yuk: …

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