Pazasi sumo pfupi yeruzha chipingamupinyi chinodzivirira mhepo kuverengera kunongedzera

Pazasi sumo pfupi yeruzha chipingamupinyi chinodzivirira mhepo kuverengera kunongedzera

General situation:

Somuenzaniso: 2M kureba ruzha chipingamupinyi;CC 2.5M chinhambwe;Installpaflyover.

 1.Wind mutoro kuverenga

F_wb=K_o× K₁ × K₃ × W_d × A_wh

Kupi

F_wb= Kukosha kwakaenzana kwemhepo inotenderera (kN)

W₀= Reference wind pressure (kN/m2)

W_d= Dhizaina dhizaini yemhepo (kN/m2)

A_wh=Kuyambuka mhepo

V_5.5= Iyo dhizaini yekumhanya kwemhepo munzvimbo inogara zambuko (m/s)

V_d= Dhizaini inonongedza kumhanya kwemhepo pakureba Z (m/s)

Z= Hurefu pamusoro pevhu (m)

Y=Kuwanda kwesimba remhepo (kn/m3)

K₀=Gadzira iyo yekushandura coefficient yemhepo yekumhanya kudzoka nguva.Yemukombe danda rebhiriji hombe rine buri rimwechete span indes, k₀=1.0;kune rimwe zambuko k₀=0.9;yeBridge munguva yekuvaka erection, k₀=0.75;Kana zambuko riri munzvimbo dzine dutu, kukosha kweK kunogona kuwedzerwa zvine mwero zvichienderana nemamiriro chaiwo.

K₃= Coefficient of terrain and geographical mamiriro, Kazhinji K₃=1.0.

K₅=kumhanya kwemhepo, k₅=1.38 pamusoro peA,B, yeC,D inova K₅=1.70.

K₂=Kugadziridza chidimbu chehurefu hwekumhanya kwemhepo tichitarisa kushata kwechikamu uye gradient;iyo coefficient yekugadzirisa K₂yekumhanya kwemhepo uye kureba kusiyanisa pane substructure yeBridges iri muintermontane mabheseni, mipata kana makomo anodarika uye zvimwe zviitiko zvakakosha zvinotemwa zvinoenderana nekirasi B yepasi chikamu.

K₁= mhepo inopikisa coefficient;

G= kukwira kwesimba regiravhiti, g=9.8m/s2.

Hushasha hwepamusoro hunogona kukamurwa kuita A, B,C,D.

Kirasi A inoreva nzvimbo yegungwa rekunze uye chitsuwa, mahombekombe, mahombekombe egungwa uye renje

Kirasi B inoreva minda, misha, masango, zvikomo, mataundi nenzvimbo dzemumadhorobha dzine dzimba dzisina vanhu.

Kirasi C inoreva nzvimbo dzemudhorobha dzine masumbu akaomeswa ezvivakwa

Kirasi D inoreva nzvimbo yemudhorobha ine gungano rakakora rezvivakwa uye dzimba dzepamusoro.

Nzvimbo iyi ndeyeKirasi C, kureba kubva pasi i8.5m, yakawanikwa K₀=0.9;K₁=1.97;K₂=0.86;K₅=1.70;V_5.5=33m/s.

So F_wh= k₀k₁k₃W_d A_wh=12.63kN

2. Dhizaini kukosha kwesimba rakachinjika

S_wh=1.4Fwh=17.68(kN)

H simbi mdemo rekukombama: M=17.68×22.5=14.14(kN·m)

H simbi mbiru yakagadzirwa 150x150x7x10mm yenyika yakajairika simbi, inotenderwa stree.=215MPa, shear stress 125MPa, ndi_x=1660cm4, W_x=221cm3, A=40.55cm2

3.Kuverenga kwekukotama simba

Ita zvinodiwa.

4.Kutsauka Calculation

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5. Yese kugadzikana kukarukureta

Ita zvinodiwa

Pamusoro pekuremerwa kuverenga kune referensi.