Fórmulas para a execução do Projecto de estabilidade – Betão Armado

O projecto de estabilidade é um dos mais importantes projectos de especialidade de Engenharia Civil.

Para a elaboração do projecto de betão armado é necessário o cálculo e verificação dos seguintes itens:

Verificação da Segurança em Relação aos Estados Limites Últimos (ELU)

A verificação da segurança em relação aos ELU que não envolvam perda de equilíbrio ou fadiga, quando feita em termos de esforços, consiste em respeitar a condição:

Sd ≤  Rd

Sendo:

Sd – valor de cálculo do esforço actuante;

Rd – valor de cálculo do esforço resistente.

–  Para combinações fundamentais:

Cálculo do esforço actuante – Combinações Fundamentais

No caso da acção variável de base ser a acção sísmica:

Cálculo do esforço actuante – Acção Sísmica

 

 

–         Para combinações acidentais:

 

 

Cálculo do esforço actuante – Combinações Acidentais

Sendo:

 

SGik – esforço resultante de uma acção permanente (valor característico);

SQ1k – esforço resultante da acção variável considerada como acção de base da combinação (valor característico), SEk ,no caso da acção sísmica;

SQjk – esforço resultante de uma acção variável distinta da acção de base (valor característico);

SFa – esforço resultante de uma acção de acidente (valor nominal);

γgi – coeficiente de segurança relativo às acções permanentes (1,35 – efeito desfavorável; 1,0 – efeito favorável)

γq – coeficiente de segurança relativo às acções variáveis (1, 5 – efeito desfavorável ; 0 – efeito favorável)

ψi – coeficientes de redução (< 1,0) relativos às respectivas acções variáveis.

Verificação da Segurança em Relação aos Estados Limites de Serviço (ELS)

 

Estados limites de muito curta duração (poucas horas no período de vida da estrutura) – Combinações raras (ou características):

A verificação de segurança exprime-se verificando que os valores dos parâmetros que definem os estados limites (abertura de fendas, deformações, tensões) são iguais ou superiores aos obtidos a partir das acções combinadas como se indica seguidamente:

 

Estados limites de curta duração (cerca de 5% do período de vida da estrutura) – Combinações frequentes:

 

 

 

Estados limites de longa duração (cerca de metade do período de vida da estrutura) – Combinações quase permanentes:

 

Sendo:

Gmi – cargas permanentes (valor médio);

Q1k – acção variável de base (valor característico);

ψ 1 . Qk – valor frequente da acção variável Qk;

ψ 2 . Qk – valor quase permanente da acção variável Qk.

Tagged , , , , , . Bookmark the permalink.

About Carla Alves

Carla Alves, Licenciada em Engenharia Civil pela Universidade da Beira Interior. Engenheira Civil Efectiva da Ordem dos Engenheiros. Faço projectos de especialidade de Engenharia Civil com freelancer e estou à procura de um emprego em Engenharia Civil.

One Response to Fórmulas para a execução do Projecto de estabilidade – Betão Armado

  1. Larryvient says:
    Your comment is awaiting moderation.

    Thanks, I appreciate this!

    novocaine interacting with viagra hom to viagra
    generic viagra 100mg
    210 area code viagra – https://genericviagramsl.com

    Geraldler
    Dwaynefof
    Kevinjal

  2. Larryvient says:
    Your comment is awaiting moderation.

    Nicely put. Thanks a lot.

    viagra by mail order viagra for hard erection
    generic viagra
    apcalis comparison levitra viagra – https://genericviagrantx.com

    Geraldler
    Dwaynefof
    Kevinjal

  3. Larryvient says:
    Your comment is awaiting moderation.

    This is nicely expressed! .

    liquid viagra shot viagra 35008
    viagra for women
    to buy viagra – https://genericviagrantx.com

    Geraldler
    Dwaynefof
    Kevinjal

  4. Larryvient says:
    Your comment is awaiting moderation.

    Terrific content. Regards!

    viagra online buy walmart viagra
    viagra online
    picture of viagras home office – https://genericviagrarcp.com

    Geraldler
    Dwaynefof
    Kevinjal

  5. Larryvient says:
    Your comment is awaiting moderation.

    You actually mentioned that terrifically!

    risk of cialis and viagra together viagra awp
    viagra without a doctors prescription
    uk based suppliers generic viagra – https://genericviagrarcp.com

    Geraldler
    Dwaynefof
    Kevinjal

  6. Larryvient says:
    Your comment is awaiting moderation.

    You actually suggested that very well.

    free sample of viagra pill buy viagra online canadian health
    viagra online
    new drug for women viagra – https://genericviagramsl.com

    Geraldler
    Dwaynefof
    Kevinjal

  7. Larryvient says:
    Your comment is awaiting moderation.

    Regards. Quite a lot of material!

    viagra riddim mix viagra uk site
    viagra without a doctors prescription
    viagra trip in thailand – https://genericviagramsl.com

    Geraldler
    Dwaynefof
    Kevinjal

  8. Larryvient says:
    Your comment is awaiting moderation.

    Appreciate it. Lots of stuff.

    dont mix viagra with steroids photo cheap generic viagra online
    buy viagra online
    anti viagra – https://genericviagrantx.com

    Geraldler
    Dwaynefof
    Kevinjal

  9. Larryvient says:
    Your comment is awaiting moderation.

    With thanks! A good amount of tips.

    when was viagra released buy viagra 32
    viagra generic
    cupon for viagra – https://genericviagramsl.com

    Geraldler
    Dwaynefof
    Kevinjal

  10. Larryvient says:
    Your comment is awaiting moderation.

    You expressed this very well.

    viagra how to take buy viagra online canadian health
    viagra for women
    premature orgasm with viagra – https://genericviagramsl.com

    Geraldler
    Dwaynefof
    Kevinjal

  11. Larryvient says:
    Your comment is awaiting moderation.

    You actually said this wonderfully.

    viagra wiht women viagra and mastrubation
    viagra pills
    making the most of viagra – https://genericviagrarcp.com

    Geraldler
    Dwaynefof
    Kevinjal

  12. Larryvient says:
    Your comment is awaiting moderation.

    You said it perfectly..

    viagra canada without prescription viagra pill for women
    viagra pills
    district of columbia viagra flomax interaction – https://genericviagrantx.com

    Geraldler
    Dwaynefof
    Kevinjal

  13. Larryvient says:
    Your comment is awaiting moderation.

    Kudos! Loads of forum posts.

    information viagra average age for viagra users
    viagra for sale uk
    herbal viagra for women – https://genericviagrantx.com

    Geraldler
    Dwaynefof
    Kevinjal

  14. Larryvient says:
    Your comment is awaiting moderation.

    Good info. Thanks!

    viagra sales in south africa free viagra canada
    generic viagra
    vardenafil viagra cialis – https://genericviagrantx.com

    Geraldler
    Dwaynefof
    Kevinjal

  15. Larryvient says:
    Your comment is awaiting moderation.

    Cheers, Quite a lot of posts.

    trusted websites for buying viagra online viagra canadian pharmacies
    viagra without a doctors prescription
    lawyer in virginia winning viagra lawsuits – https://genericviagrantx.com

    Geraldler
    Dwaynefof
    Kevinjal

  16. Larryvient says:
    Your comment is awaiting moderation.

    Regards, A lot of stuff.

    viagra for blood pressure price for viagra
    generic viagra 100mg
    viagra target market men age – https://genericviagrarcp.com

    Geraldler
    Dwaynefof
    Kevinjal

  17. Larryvient says:
    Your comment is awaiting moderation.

    Nicely put. Thanks a lot.

    lawsuits viagra heart attacks viagra generic differences
    viagra for women
    viagra shipping – https://genericviagramsl.com

    Geraldler
    Dwaynefof
    Kevinjal

  18. Larryvient says:
    Your comment is awaiting moderation.

    Useful posts. Cheers!

    mens viagra typical viagra experience
    viagra online
    new life generic viagra – https://genericviagramsl.com

    Geraldler
    Dwaynefof
    Kevinjal

  19. Larryvient says:
    Your comment is awaiting moderation.

    Whoa lots of helpful tips.

    taking old viagra viagra sample india
    viagra for women
    viagra sildenafil citrate without prescription – https://genericviagrantx.com

    Geraldler
    Dwaynefof
    Kevinjal

  20. Larryvient says:
    Your comment is awaiting moderation.

    Effectively spoken really! !

    target google viagra order cheap prostitution viagra speed thailand
    buy viagra
    12 caverta veega generic viagra – https://genericviagrarcp.com

    Geraldler
    Dwaynefof
    Kevinjal

  21. Larryvient says:
    Your comment is awaiting moderation.

    You expressed it perfectly!

    naked men on viagra when viagra doesn’t work any more
    generic viagra 100mg
    age of men who take viagra – https://genericviagramsl.com

    Geraldler
    Dwaynefof
    Kevinjal

  22. Larryvient says:
    Your comment is awaiting moderation.

    Regards, Quite a lot of forum posts.

    can viagra affect the prostate gland herbal viagra tablets
    viagra online
    compare viagra vs cialis – https://genericviagramsl.com

    Geraldler
    Dwaynefof
    Kevinjal

  23. Larryvient says:
    Your comment is awaiting moderation.

    Amazing many of fantastic data.

    viagra and poppers what works better viagra or cialis
    buy viagra online
    generic sildenafil viagra – https://genericviagrantx.com

    Geraldler
    Dwaynefof
    Kevinjal

  24. Larryvient says:
    Your comment is awaiting moderation.

    This is nicely expressed. .

    shopping online for viagra soft tabs mad about you viagra
    generic viagra 100mg
    viagra study with women – https://genericviagrantx.com

    Geraldler
    Dwaynefof
    Kevinjal

  25. Larryvient says:
    Your comment is awaiting moderation.

    Amazing stuff. Thanks!

    can i take viagra with alcohol viagra labels
    viagra without a doctor prescription
    pages edinburgh search viagra free – https://genericviagramsl.com

    Geraldler
    Dwaynefof
    Kevinjal

  26. Larryvient says:
    Your comment is awaiting moderation.

    You’ve made your point!

    norvasc and viagra pfizer viagra on line
    viagra online
    buying viagra over the counter – https://genericviagrarcp.com

    Geraldler
    Dwaynefof
    Kevinjal

  27. Larryvient says:
    Your comment is awaiting moderation.

    Thanks! I enjoy this.

    viagra alike viagra ans cialis
    generic viagra
    russian band viagra nude – https://genericviagramsl.com

    Geraldler
    Dwaynefof
    Kevinjal

  28. Larryvient says:
    Your comment is awaiting moderation.

    Thanks a lot! A good amount of content.

    viagra in hungary a href viagra a
    viagra without a doctors prescription
    message board for viagra – https://genericviagrarcp.com

    Geraldler
    Dwaynefof
    Kevinjal

  29. Larryvient says:
    Your comment is awaiting moderation.

    Regards. I enjoy this!

    viagra pillen find sites computer shop viagra href
    generic viagra online
    wholesalers of viagra – https://genericviagrantx.com

    Geraldler
    Dwaynefof
    Kevinjal

  30. Larryvient says:
    Your comment is awaiting moderation.

    Awesome advice. Many thanks!

    sildenafil tablet viagra recomended sites for generic viagra
    buy viagra
    american hooked on viagra – https://genericviagrarcp.com

    Geraldler
    Dwaynefof
    Kevinjal

  31. Larryvient says:
    Your comment is awaiting moderation.

    You actually stated it terrifically.

    active compound viagra chemist gibraltar no-risk viagra
    viagra for women
    coupons for cialis viagra or levitra – https://genericviagrarcp.com

    Geraldler
    Dwaynefof
    Kevinjal

  32. Larryvient says:
    Your comment is awaiting moderation.

    You actually expressed it well.

    can i take benicar with viagra viagra sale online
    viagra for women
    light sensitivity with viagra – https://genericviagrarcp.com

    Geraldler
    Dwaynefof
    Kevinjal

  33. Larryvient says:
    Your comment is awaiting moderation.

    Nicely put, Thanks a lot!

    free sites computer search viagra buy cailis soft vesus viagra
    viagra for sale uk
    viagra alter – https://genericviagramsl.com

    Geraldler
    Dwaynefof
    Kevinjal

  34. Larryvient says:
    Your comment is awaiting moderation.

    Reliable write ups. Many thanks.

    teachers and viagra and wisconsin viagra at walmart
    generic viagra
    order viagra consumer discount rx – https://genericviagramsl.com

    Geraldler
    Dwaynefof
    Kevinjal

  35. Larryvient says:
    Your comment is awaiting moderation.

    Many thanks. Excellent stuff.

    best retail pharmacy viagra price buy viagra online no prescription
    buy generic viagra
    online viagra review – https://genericviagramsl.com

    Geraldler
    Dwaynefof
    Kevinjal

  36. Larryvient says:
    Your comment is awaiting moderation.

    You said that terrifically!

    viagra dealers generic viagra levitra regalis
    viagra pills
    blues song viagra commercial – https://genericviagrantx.com

    Geraldler
    Dwaynefof
    Kevinjal

  37. Larryvient says:
    Your comment is awaiting moderation.

    Effectively spoken truly. .

    buy viagra costa rica my dog ate a viagra
    viagra generic
    positive test for viagra – https://genericviagramsl.com

    Geraldler
    Dwaynefof
    Kevinjal

  38. Larryvient says:
    Your comment is awaiting moderation.

    You said it superbly.

    purchase viagra medication free viagra videos
    buy viagra online
    where to get viagra samples – https://genericviagrantx.com

    Geraldler
    Dwaynefof
    Kevinjal

  39. Larryvient says:
    Your comment is awaiting moderation.

    Truly many of good information.

    viagra contest viagra and heart attack
    viagra online
    viagra cialis levitra in lima peru – https://genericviagramsl.com

    Geraldler
    Dwaynefof
    Kevinjal

  40. Larryvient says:
    Your comment is awaiting moderation.

    You actually expressed that really well!

    female viagra pulmonary hypertension keywords generic viagra
    generic viagra online
    viagra doctor consultation and shipping free – https://genericviagrantx.com

    Geraldler
    Dwaynefof
    Kevinjal

  41. Larryvient says:
    Your comment is awaiting moderation.

    Thanks! A lot of forum posts!

    viagra before and after 25 and on viagra
    generic viagra online
    buy viagra in mexico – https://genericviagrantx.com

    Geraldler
    Dwaynefof
    Kevinjal

  42. Larryvient says:
    Your comment is awaiting moderation.

    Kudos! Good information!

    female pleasure viagra natural alternatives viagra
    generic viagra online
    lowest viagra price usa pharmacies – https://genericviagrantx.com

    Geraldler
    Dwaynefof
    Kevinjal

  43. Larryvient says:
    Your comment is awaiting moderation.

    Truly all kinds of useful info.

    viagra in your 20s buy generic viagra with paypal
    viagra online
    commande viagra – https://genericviagrarcp.com

    Geraldler
    Dwaynefof
    Kevinjal

  44. Larryvient says:
    Your comment is awaiting moderation.

    You actually expressed this superbly.

    viagra on line prescription pharmacy india viagra cialis
    viagra without a doctor prescription
    lawyer in virginia winning viagra lawsuits – https://genericviagrantx.com

    Geraldler
    Dwaynefof
    Kevinjal

  45. Larryvient says:
    Your comment is awaiting moderation.

    Terrific tips. Thank you.

    tom skerritt viagra ad cheapest 50mg generic viagra
    buy viagra online
    viagra motorcycle – https://genericviagramsl.com

    Geraldler
    Dwaynefof
    Kevinjal

  46. Larryvient says:
    Your comment is awaiting moderation.

    Wonderful information. Thanks.

    ciallis or viagra female viagra fox news
    viagra 100mg
    precautions for viagra users – https://genericviagrarcp.com

    Geraldler
    Dwaynefof
    Kevinjal

  47. Larryvient says:
    Your comment is awaiting moderation.

    Excellent information. With thanks!

    apcalis versus viagra does viagra help women
    buy viagra online
    vasotec and viagra interactions – https://genericviagramsl.com

    Geraldler
    Dwaynefof
    Kevinjal

  48. Larryvient says:
    Your comment is awaiting moderation.

    With thanks! An abundance of tips!

    viagra user pictures oklahoma viagra prescriptions
    viagra without a doctors prescription
    quick forum readtopic viagra signature online – https://genericviagrarcp.com

    Geraldler
    Dwaynefof
    Kevinjal

  49. Larryvient says:
    Your comment is awaiting moderation.

    Tips nicely regarded!.

    viagra cod chemist gibraltar no-risk viagra
    generic viagra 100mg
    viagra for muscle building – https://genericviagrantx.com

    Geraldler
    Dwaynefof
    Kevinjal

  50. Larryvient says:
    Your comment is awaiting moderation.

    Valuable info. With thanks.

    stores that sell viagra in australia buy viagra in perth
    generic viagra 100mg
    herbal viagra for women – https://genericviagrantx.com

    Geraldler
    Dwaynefof
    Kevinjal

  51. Larryvient says:
    Your comment is awaiting moderation.

    You’ve made your stand very effectively!!

    floater eye problems and viagra viagra zeit
    viagra online
    viagra fux – https://genericviagrarcp.com

    Geraldler
    Dwaynefof
    Kevinjal

  52. Larryvient says:
    Your comment is awaiting moderation.

    Terrific forum posts, With thanks.

    canadian generic pharmacy viagra viagra bangkok
    generic viagra 100mg
    india generic viagra legal – https://genericviagrarcp.com

    Geraldler
    Dwaynefof
    Kevinjal

  53. FRANCISCO RICARDO says:

    Sou estudante de engenharia e gostaria de saber para calculo de estacas só consideramos a combinação rara? O vento não entra?

Deixe uma resposta

O seu endereço de email não será publicado. Campos obrigatórios marcados com *