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Bopylama opqqa normal yoriqlar hosil boplishiga hisob.
koeffitsienti qiymatini γ_sp=1
Qabul qilamiz M= 36.94 kHˑm
Yoriqlar paydo bo`lishidagi momentni hisoblaymiz
M<sub>crc</sub>=R<sub>bt,ser</sub>ˑW<sub>pl</sub>+M<sub>rp</sub>=1.6ˑ(100)11105+18544942.3=3631742.3 Hˑsm=36.3 kHˑm
Bu yerda Y<sub>sp</sub>=0.9 bo`lgandagi siquvchi kuch yadroviy momenti
M_rp=Y_spˑp_02ˑ(e_op+r)=0.9_ˑ160893.6_ˑ(8+4.81)=1854942.3 H_ˑsm
M_crc=36.3 kH_ˑm< M=36.94 kH_ˑm bo`lganligi uchun chiziluvchi zonada yoriq hosil bo`ladi . demak, yoriqlar ochilishiga hisoblash kerak


plita siqilgandan uni yuqori zonasida boshlang`ich yoriqlar xosil bo`lishini tekshiramiz

Tortish aniqligi bo`yicha koeffitsient γ_sp=1.122

plita hususiy og`irligidan hozil bo`lgan moment M= 0 kH_ˑm
Hisobiy shart p₁(e_op-r_inf)-Mbtp_ˑW_pl
p₁(e_op-r_inf)-M=1,1_ˑ180864(8-4,81)-0=634651,8 H_ˑsm=6,35 kH_ˑm
R_btpˑW<sup>`</sup><sub>pl</sub>=1<sub>ˑ</sub>100<sub>ˑ</sub>11105=1110500 H<sub>ˑ</sub>sm=11,11 kH<sub>ˑ</sub>m
6,35 kH<sub>ˑ</sub>m<11,11 kH<sub>ˑ</sub>m bajarildi. plita yuqori qismida yoriqlar xosil bo`lmaydi bu yerda R_btp= 12,5Mpa beton yetuklik mustahkamligiga to`g`ri kelgan cho`zilishga qarshiliigi


Bo`ylama o`qqa normal yoriqlar ochilishiga hisob
γ_sp=1 yoriqlar ochilishini ruxsat etilgan chegaraviy eni :
Davomy bo`lmagan a<sub>crc</sub>=(0.4 mm); davomiy a<sub>crc</sub>=(0,3 mm);
Me`yoriy yuklamalardan xosil bo`lgan eguvchi momentlar :
Doimiy va uzoq muddatli - 31,17 kH<sub>ˑ</sub>m
Jami - 36,94 kH<sub>ˑ</sub>m
Doimiy va uzoq muddatli yuklamalar ta`siri ostida cho`ziluvchi armaturadagi kuchlanishning ortishi
a<sub>s</sub>=(M-p<sub>2</sub>(z<sub>1</sub>-e<sub>sp</sub>))W<sub>s</sub> =(3117000-160893,6<sub>ˑ</sub>16,5)/(51,8<sub>ˑ</sub>(100))=89,2Mpa
bu yerda ichki kuchlar yelkasi quyidagicha olinadi : Z<sub>1</sub>=h<sub>0</sub>-0.5h<sup>`</sup>_s = 19-0.5_ˑ5=16.5 sm
e_sp=0 chunki p siquvchi kuch joyida joylashgan zo`riqtirilgan armatura markazidan o`tadi .
cho`ziluvchi armature bo`yicha kesimning qarshilik momenti
W_s=A_sˑZ₁= 3.14_ˑ16.5=51.8 sm²
To`la yuklama ta`siri ostida cho`ziluvchi armaturadagi kuchlanishning ortishi
A<sub>s</sub>= (3694000-160893,6<sub>ˑ</sub>16.5)/(51.8<sub>ˑ</sub>(100))=200.6Mpa
To`la yuklamaning davomiy bo`lmagan ta`siridan yoriqlar ochilish eni

A_crc1=20(3.5-100_{ })δηφ l_{ }=20(3,5-100_ˑ0,0118)_ˑ1_ˑ1_ˑ1 _{   }=0,106 mm

Bu yerda _{ }=A _s/bh₀= 3.14/14_ˑ19=0.0118; _{ }=1; _{ }=1; _{ l}=1

Bo`ylama armatura diametri d=10;
Doimiy va uzoq muddatli yuklamalarning davomiy bo`lmagan ta`siridan yoriqlar ochilish eni
a<sub>crc1</sub>= 20(3.5-100<sub>ˑ</sub>0.0118)<sub>ˑ</sub>1<sub>ˑ</sub>1<sub>ˑ</sub>1 89,2/190000 <sub> </sub>=0.047 mm
doimiy va uzoq muddatli yuklamalarning davomiy bo`lgan ta`siridan yoriqlar ochilish eni
a<sub>crc2</sub>= 20(3.5-100<sub>ˑ</sub>0.0118)<sub>ˑ</sub>1<sub>ˑ</sub>1<sub>ˑ</sub>1.4 <sub>   </sub>=0.066 mm
bu yerda <sub> l</sub>=1.6-15<sub> </sub>= 1.6-150.0118=1.4
davomiy bo`lmagan yoriqlar ochilish eni
a_crc=a_crc1-a_crc1+a_crc2=0.106-0.047+0.066=0.125 mm <[0.4 mm]
davomiy yoriqlar ochilish eni
a_crc=a_crc2= 0.066=0.066 mm < (0.3 mm)