N'okpuru nkenke okwu mmeghe maka mkpọtụ ihe mgbochi ifufe ibu ngụkọta oge maka ntụnye aka

N'okpuru nkenke okwu mmeghe maka mkpọtụ ihe mgbochi ifufe ibu ngụkọta oge maka ntụnye aka

Ọnọdụ izugbe:

Dịka ọmụmaatụ: ihe mgbochi mkpọtụ elu 2M;CC 2.5M anya;Wụnyena flyover.

 1.Wind ibu gbakọọ

F_wb=K_o× K₁ × K₃ × W_d × A_wh

Ebee

F_wb= Uru ọkọlọtọ nke ibu ikuku transverse (kN)

W₀= Nrụtụ aka nke ikuku ikuku (kN/m2)

W_d= Chepụta nrụgide ikuku ntụaka (kN/m2)

A_wh=Gafere mpaghara ikuku

V_5.5= Ọsọ ikuku nke imewe dị na mpaghara ebe akwa mmiri dị (m / s)

V_d= Ntugharị ọsọ ikuku na elu Z (m/s)

Z= Ogo n'elu ala (m)

Y=Njupụta ike ndọda (kn/m3)

K₀= Hapụta ọnụọgụ ngbanwe nke oge nlọghachi ọsọ ikuku.Maka oghere iko nke nnukwu akwa mmiri nwere otu oghere span indes, k₀= 1.0;maka akwa akwa k₀= 0,9;maka Bridge n'oge nrụpụta ihe owuwu, k₀= 0,75;Mgbe àkwà mmiri ahụ dị n'ebe ndị ajọ ifufe na-efe efe, uru K nwere ike ịbawanye nke ọma dịka ọnọdụ dị adị.

K₃= Ọnụọgụ nke ala na ọnọdụ ala, N'ozuzu K₃= 1.0.

K₅= ọnụọgụ ọsọ ikuku, k₅=1.38 ruo n'elu A,B, maka C,D nke bụ K₅= 1.70.

K₂=Ntụziaka ngbanwe nke ịdị elu ikuku na-agbagharị n'ịtụle ụdị nhụsianya elu na gradient;ọnụọgụ mgbazi K₂nke ikuku ọsọ na ịdị elu mgbanwe na substructure nke Bridges dị na intermontane basins, ndagwurugwu ma ọ bụ ugwu gafere na ndị ọzọ pụrụ iche oge na-ekpebisi ike dị ka klaasị B udi udi.

K₁= ọnụọgụ nguzogide ikuku;

G= osooso ndọda elu, g=9.8m/s2.

Enwere ike kewaa ihe siri ike n'elu n'ime A, B, C, D.

Klas A na-ezo aka n'elu oke osimiri dị n'ụsọ osimiri na agwaetiti, oke osimiri, ọdọ mmiri na ọzara

Klas B na-ezo aka n'ọhịa, obodo nta, oke ọhịa, ugwu, obodo na mpaghara ime obodo nwere nnukwu ụlọ.

Klas C na-ezo aka na mpaghara obodo mepere emepe nwere nnukwu nnukwu ụlọ

Klas D na-ezo aka n'obodo mepere emepe nwere nnukwu ụlọ na ụlọ dị elu.

Mpaghara ahụ bụ nke Klas C, ịdị elu sitere na ala bụ 8.5m, chọtara 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. Nhazi uru nke ike kehoraizin

S_wh= 1.4Fwh=17.68(kN)

H ígwè moge na-ehulata anyụike: M= 17.68×22.5=14.14 (kN·m)

H ígwè kọlụm mere nke 150x150x7x10mm mba ọkọlọtọ ígwè, ekwe osisi= 215MPa, mkpasi ike 125MPa, I_x= 1660cm4, W_x=221cm3, A=40.55cm2

3.Mgbakọ nke ike na-ehulata

Zute ihe achọrọ.

4.Ntughari Mgbakọ

Mnke chọrọ

5. Ngụkọta nkwụsi ike dum

Zute ihe achọrọ

N'elu ibu ngụkọta oge maka ntụnyere.