Structural Calculation May 2009 English

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Structural Calculation May 2009 English

  1. 1. STRUCTURAL CALCULATION REPORT RESIDENTIAL HOME PREFABRICADOS Y MODULARES DE MONTERREY
  2. 2. Background In this Calculation Report the design for the structure of a resedential home is provided by Prefabicados y Modulares de Monterry, S de R.L. DE C. V. For the design of this structure the following design guidelines were considered, in accordance to the plans provided by PyMM. 1 Solid Walls and Slabs of Lightweight Concrete 2 Load Bearing Walls 3 Foundation Slabs 4 Live load of Roof of 170 kg/m2 5 Additional Dead Load of Slab of 170 kg/m2 This report is presented in a descriptive format, giving special emphasis in describing the criteria of analysis and the designs utilized in this structure. A annex to the main body of the report is also presented, where the results of the computer simulations are itemized for the structural design. 2 Description of the Structure The structuring of the home consists of prefabricated walls and slabs (figure 1), Foundation slabs. (Figure 2), Walls, slabs and Foundation Slabs are assembled, (Figure 3), Facades (Figure 4) and a spare room can be attached on site with solid concrete walls and slabs (Figure 5) The walls and the slab are cast monolithicly with lightweight concrete, the foundation slab is cast with high strength concrete and the facades are cast with lightweight concrete. Once cast the components are connected to form a house. ________________________________________________________________________________________
  3. 3. 3 Dimensional View of the Slabs and Walls 3 Dimensional view of the Slab and Walls. The slab and walls are cast monolithically with concrete with the density of 1.400kg/m3, and with the Strength of 130kg/cm2 with a thickness of 12cm, the walls were articulated at the bottom where it connects to the foundation slab. ________________________________________________________________________________________
  4. 4. 3 Dimensional View of the Foundation Slab The foundation slab is cast with 300kg/cm2 concrete, the supports for the slab are shown supporting the connections with the walls of the home in its first state of load _______________________________________________________________________________
  5. 5. 3 Dimensional View of the Assembly The assembly for the walls, slab and foundation slab is modeled in what is considered in its final state, when they are assembled on site in the model they are supported on springs whose stiffeness is similar to the final terrain. Attached to the foundation slab.
  6. 6. 3 Dimensional View of the Facades The Facades are simply modeled supported on the connection points where they are attached to the wall plates of the home, cellular concrete was used with a density of l.400/m3
  7. 7. 3. Design Criteria For the final dimensioning of the structural elements the guidelines set by PyMM were taken into account for the design. The criteria used in the design are: a) The elements of the concrete ; were carried out following the recommendations of ACI-318-05, ACI-523.2R-96 Y ACI-213R-99 b) High strength concrete was considered with the compression strength of 300 kg/cm2, 150 kg//cm2 and for the cellular concrete of 130kg/cm2. c) Reinforcement steel of 4200kg/cm2 was considered. 4. Estimation of design loads and combinations Presented below to calculate the loads considered for the design of the structure and foundation, as well as combination of loads used in the structural analysis. 4.1 Dead Load It is considered the as the weight of the main structure, concrete plate, clay block, reinforcement steel and others. Following way: Concept Weight (Kg/m2) Weight of the plate (cellular concrete) 175 Weight of the plate (high strength concrete) 300 Additional Dead Load Weight of tile and mortar 55 Weight of dividing walls 100 Weight of finishing 15
  8. 8. 4.2 Live Load A mezzanine of three walls is considered a live load. Live Load of 170 kg/m2 4.3 Design Combinations Several combinations of loads were considered in the designing of the struct- -ural elements. The basic loads used and combinations for the main structure were included in the analysis, while the loads used for the foundations were done separately, both combinations are shown together. Basic Loads Typical Load Identification in model Dead Load (weight) Dead Over Dead Load SD Live Load LIVE Combinations for the design of the superstructure Typical Load Identification in model DEAD + LIVE SERV 1.2 DEAD + 1.6 LIVE 12D16L
  9. 9. 5. Structural Analysis Program SAP-2K Consideration 1 Walls and slab casted monolithically simply supported on the foundation. SLAB Last Moments in Slab (M11)
  10. 10. Last Moments in Wall (M22) Shear in Slab (V 13)
  11. 11. Shear in the Slab (V23) LATERAL WALLS 1 Last moments in Walls (M 11)
  12. 12. Last moments in Slab (M22) Shear in Walls (V 13)
  13. 13. Shear in wall (V23) LATERAL WALLS 2 Last moments in Walls (M11)
  14. 14. Last Moments in Walls (M22) Shear in Wall (V13)
  15. 15. Shear in wall (V23) POSTERIOR WALL Last Moments in Wall (M 11)
  16. 16. Last moments in walls (M22) Shear in Wall (V13)
  17. 17. Shear in wall (V23) Foundation Slab simply supported on the walls Last moments in foundation Slab (M11)
  18. 18. Last moments in the foundation slab (M22) Shear in foundation slab (V13)
  19. 19. Shear in foundation slab (V23)
  20. 20. Consideration 2 Walls and Slabs cast monolithically, modeled in conjuction with the foundation, supported on springs. WALL Last moments in slab(M11)
  21. 21. Last moments in slab (M22) Shear in slab (V13)
  22. 22. Shear in slab (V23) LATERAL WALLS 1 Last Moments in wall (M11)
  23. 23. Last moments in wall (M22) Shear in wall (V13)
  24. 24. Shear in wall (V23) LATERAL WALLS 2 Last moments in walls(M11)
  25. 25. Last Moments in wall (M22) Shear in wall (V13)
  26. 26. Shear in wall (V23) POSTERIOR WALL Last moments in wall (M11)
  27. 27. Shear in wall (V23) Slab foundation in conjuction with the walls Last Moments in Slab foundation (M11)
  28. 28. Annex B Design of Structural Elements
  29. 29. Design for concrete slab M11 Maximum positive moment General Notes Calculation of area of steel Maximum negative moment General Notes Calculation of area of steel
  30. 30. Design of concrete slab M22 Maximum positive moment General Notes Caculation of area of steel
  31. 31. Maximum negative moment General Notes Calculation of area of steel
  32. 32. Maximum positive moment General Notes Calculating the area of steel
  33. 33. Maximum negative moment General Notes Calculating area of steel
  34. 34. Design of slab foundation M22 Maximum positive moment General Notes Calculating of area of steel
  35. 35. Maximum negative moment General Notes Calculating area of steel
  36. 36. Revision of Shear Shear resistance of Cellular Concrete Actual Shear Shear Resistance Shear resistance in high strenth concrete Actual Shear Shear resistance
  37. 37. Design of slab foundation M11 Maximum positive moment General Notes Calculating area of steel
  38. 38. Maximum Negative moment General Notes Calculation of area of steel
  39. 39. Design of foundation slab M22 Maximum positive moment General Notes Calculating the area of steel
  40. 40. Maximum negative moment General Notes Calculating area of steel
  41. 41. PLANS

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