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3D-Dynamic design for reinforced versus prestress concrete for Al-Huriya building

3D-Dynamic design for reinforced versus prestress concrete for Al-Huriya building. Prepared by Nizar Abed Al-Majeed Salameh Mohamed Khaled Abu-Al Huda Supervisor Dr. Imad Al-Qasem. CHAPTER ONE INTROUCTION.

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3D-Dynamic design for reinforced versus prestress concrete for Al-Huriya building

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  1. 3D-Dynamic design for reinforced versus prestress concrete for Al-Huriya building Prepared by Nizar Abed Al-Majeed Salameh Mohamed Khaled Abu-Al Huda Supervisor Dr. Imad Al-Qasem

  2. CHAPTER ONE INTROUCTION The project is a structural analysis and 3D-Dynamic design of an office building in Ramallah city, known as AL-Huriya, which consists of a seven stories, with 3.5 height except the first floor with 4m story height. The building will be first designed under a static load, after that we will study the building for dynamic , finally a prestress concrete will be used to design the building to compare it with the reinforcement concrete, to conclude many factors that should be taken into consideration in designing any structure. These include economic factors , durability and the safety of its inhabitants.

  3. Materials • Loads

  4. CHAPTER TWO SLAB

  5. One way solid slab is used only as slab system • Use slab thickness of 17cm , according to deflection requirement In design phase of the slab, there are two strip(1m) taken as a model. Loads distribution Strip I Wu=1.51 15@3.75m Strip II Wu=1.51 6@3.75m

  6. Moment distribution Strip I Strip II Use 4Ф12mm for negative and positive moment

  7. CHAPTER THREE BEAMS Beams in this part of the project will be designed using reactions from beam model in SAP2000. The girder system is used to design the building, and all of the beams are dropped; multi span and large space beams are used in all floors. The system of the building consist of a four beams group (B1, B2, B3, B4) And a two group of girders (G1, G2).

  8. Moment Design

  9. Shear Design

  10. Final Results

  11. CHAPTER FOUR COLUMNS sixteen columns having a rectangular section, and eight columns having a circular section, will be designed. All the columns in this project are classified into two groups depending on the ultimate axial load and the shape. The ultimate axial load on each column is from the Reaction of beams

  12. Final Results

  13. CHAPTER FIVE FOOTING In this chapter the footing will be designed, all footings in this part of the project will be isolated (single) footings. The design will depend on the total axial load carried by each column. The footings are classified into two groups

  14. Group F1 Design

  15. Group F2 Design

  16. Final Results

  17. Ground Beam Design

  18. Final Result

  19. Static vs. Dynamic analysis Our representative element will be the bending moment at the mid span of the interior span in the 2nd frame for each model. • Static analysis We will take model for three stories , seven stories and ten stories then read the moment due to dead load and live load.

  20. Our representative element will be the axial force due to live load . We will take model for three stories , seven stories and ten stories ,then read the axial force for corner , edge and interior columns in the bottom of each model. • SAP 2000 Analysis Results Columns Comparison

  21. Tributary area Internal Col. Edge Col. Corner Col.

  22. Tributary area Results

  23. Dynamic Analysis

  24. CHAPTER SEVEN PRESTRESS CONCRETE Introduction Prestress concrete is not a new concept, it’s backing to 1872. (Jackson), an engineer from California, patented prestressing system that used a tie rod to construct beams or arches from individual blocks. The most practical development in prestressed concrete occurred from (1920 – 1960). We will design the prestressbuilding for gravity loads only, and the punching shear excluded from this study. (ACI units is used)

  25. Material properties and loads Material properties:- f’c =6000 Psi f’ci = 4200 Psf fpu = 270 Ksifpy=243 Ksi fpe= 159 Ksify= 60000 Psi Use strands = 1.0 inch. Pe= 257597 Ib Loads:- live load (LL) = 80 Psf Super Imposed Load (SID) = 60 Psf

  26. Slab thickness = Slab thickness = = 13.13 inches. Take slab thickness = 13.5 inches.

  27. Slab Design for prestress system • Check stresses:- 1) check allowable stresses for the prestressing force and the slab own weight. 2) Check the ultimate strength .

  28. Columns designfor Prestress system Sixteen columns having a rectangular section, and eight columns having a circular section, will be designed. All the columns in this project are classified into two groups depending on the ultimate axial load and the shape. The ultimate axial load on each column is from the Tributary area. s

  29. Final Results

  30. Footing design for prestress system All footings in this part of the project will be isolated (single) footings. The design will depend on the total axial load carried by each column. The footings are classified into two groups

  31. Group F1 Design

  32. Group F2 Design

  33. Final Results

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