DISEÑO DE ELEMENTOS TIPO SHELL EN SAP2000 V10

joseluisyr · Usuario Master 1 Registrado: 23 Sep 2004 Mensajes: 81 Ciudad: Trujillo

Vínculos Patrocinados

Saludos, alguien me puede decir donde se encuentra la opción para diseñar elementos tipo shell en sap2000 v10.

Hasta pronto.

joseluisyr · Usuario Master 1 Registrado: 23 Sep 2004 Mensajes: 81 Ciudad: Trujillo

jlramoscruz · Publicado: Wed Apr 05, 2006 12:32 pm **Asunto**:

Si asi es existe una opcion para el diseño y verificacion del refuerzo en placas y esta en la misma casilla de elementos SHELL.

jlramoscruz · Publicado: Fri Apr 07, 2006 12:39 pm **Asunto**: diseño de placas

algunas imagenes

oswalarce · Publicado: Sun Apr 23, 2006 8:43 am **Asunto**:

PRIMERO GRACIAS ESTA MUY CLARO LA EXPLICACION CON LAS IMAGENES. uNA cONCULTA Como interpreto los datos en las graficas si ya he modelado el elemento shell. Mil Gracias Sad

jlramoscruz · Publicado: Thu May 18, 2006 11:56 am **Asunto**:

buscandoen algunos foros encontre lo siguiente... espero aclare algunas dudas

ferroantunes (Civil/Environme) 5 May 06 10:09
I found this post from mgabrielle in a finite element analysis thread in this site. It might me interesting:

"
Here is a response from the the SAP2000 tech. support team:

The official documentation for concrete shell design implementation in SAP2000 is still under development and should be available soon. Meanwhile, here is some interim information on concrete shell design to keep you going.

The design of reinforcement for concrete shells in accordance with a predetermined field of moments, as implemented in SAP2000, is based on the following two papers:

Optimum design of reinforced concrete shells and slabs” by Troels Brondum-Nielsen, Technical University of Denmark, Report NR.R 1974
Design of Concrete Slabs for Transverse Shear”, Peter Marti, ACI Structural Journal, March-April 1990
Generally, the slab elements are subjected to eight stress resultants. In the SAP2000 terminology, these are: the three membrane force components F11, F22, and F12; the two flexural moment components M11, M22, and the twisting moment M12; the two transverse shear force components V13, and V23. For the purpose of design, the slab is conceived as comprising two outer layers centered on the mid-planes of the outer reinforcement layers and an uncracked core (this is sometimes called a "sandwich model"). The covers of the sandwich model (i.e. the outer layers) are assumed to carry moments and membrane forces while the transverse shear forces are assigned to the core. The design implementation in SAP2000 assumes that there are no diagonal cracks in the core. In such a case, a state of pure shear developes within the core, and hence the transverse shear force at a section has no effect on the in-plane forces in the sandwich covers. Thus, no transverse reinforcement needs to be provided, and the in-plane reinforcement is not enhanced to account for transverse shear.

Given below is a summary of the procedure as implemented in SAP2000:

1. As mentioned above, the slab is conceived as comprising two outer layers centered on the mid planes of the outer reinforcement layers

2. The thickness of each layer is taken as equal to the lesser of:

- twice the cover measured to the center of the outer reinforcement

- twice the distance from the center of the slab to the center of outer reinforcement

3. The six resultants F11, F22, F12, M11, M22, and M22 are resolved into pure membrane forces N11, N22, and N12 calculated as acting respectively within the central plane of the top and bottom reinforcement layers. In transforming the moments into forces, the

lever arm is taken as the distance between the outer reinforcement layers.

4. For each layer, the reinforcement NDes1, NDes2, concrete principal compressive forces Fc1, Fc2, and concrete principal compressive stresses Sc1 and Sc2, are calculated according to the rules set out in Reference 1 above.

5. Reinforcement forces are converted to areas per unit width (i.e. reinforcement intensities) Ast1, and Ast2 using appropriate steel stress and stress reduction factor.

You can use this feature to estimate the reinforcement requirements for a concrete shell element used in any model. As is evident from the above discussions, the design is solely based on element stress resultants obtained from a finite element analysis. No effect of the boundary conditions is directly used in the design routines.
"

Ricardo

jhing · Publicado: Thu Jun 15, 2006 9:45 am **Asunto**:

jlramoscruz AGRADECERIA MUCHO SI PUBLICARAS EL MODELO DEL CUAL OBTUVISTE LAS IMAGENES...

DESDE YA MUCHAS GRACIAS

Ley_de_murphy · Publicado: Mon Mar 05, 2007 9:30 am **Asunto**:

Seee.... sería ótimo

FYU · Publicado: Mon Mar 05, 2007 11:24 am **Asunto**:

Estimados,

acá les dejo más información respecto de este tema...

ach · Publicado: Sat Oct 06, 2007 10:06 am **Asunto**:

Oye oswalarce.....

Una apreciación personal tal vez me equivoque.........

Parece que te inicias en el manejo de los elementos SHELLS por el tipo de preguntas, lo deduzco por que las mismas he venido haciendo desde hace 3 años a mis colegas..........

Te diré que aún el más avanzado estudioso del tema siempre tendrá por delante un universo de cosas por aprender......

Acuérdate del sabio filósofo que dijo: "A mi edad y después de todo lo visto y aprendido, yo solo sé que no se nada" creo que fué Sócrates.....

Ahora un recomendación......

De tal suerte que vamos pa delante, te recomiendo que visites el foro de SAP2000 allí hay un tema bastante ilustrativo y trata de la interpretación de las salidas que el SAP reporta para los SHELLS recomiendo ampliamente los documentos que allí están disponibles para descargar te darán mucha luz.......

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