7 4 The precast floor system consists of a 150-mm-thick concrete slab carry its self weight as well a (50mm tiles and mortar) is simply supported on four concrete beams (300*500)mm that, in turn, are supported by two concrete girders (300*600mm), as shown in Fig.4. Determine the dead loads acting on beams and girders. (Densities: Let Yconcrete 24 kN/m² and Y tiles and mortar 20 kN/m³) Concrete Girder 10 E 5 m Concrete floor beam (300*500)mm B F 5 m 5 m D 23 50 mm tiles and mortar 150 mm Concrete slab H 150 mm Concrete slab + 50 mm tiles €

7 4 The precast floor system consists of a 150-mm-thick concrete slab carry its self weight as well a (50mm tiles and mortar) is simply supported on four concrete beams (300500)mm that, in turn, are supported by two concrete girders (300600mm), as shown in Fig.4. Determine the dead loads acting on beams and girders. (Densities: Let Yconcrete 24 kN/m² and Y tiles and mortar 20 kN/m³) Concrete Girder 10 E 5 m Concrete floor beam (300*500)mm B F 5 m 5 m D 23 50 mm tiles and mortar 150 mm Concrete slab H 150 mm Concrete slab + 50 mm tiles €

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Similar questions

A TIMBER BLOCK "B x B" mm SQUARE IS REINFORCED ON OPPOSITE SIDES BY A "B" mm AND 't' mm THICK STEEL PLATES. DETERMINE THE THICKNESS 't' SO THAT THE ASSEMBLY WILL SUPPORT AN AXIAL LOAD OF 1000 KN WITHOUT EXCEEDING A MAXIMUM TIMBER STRESS OF 12 MPa OR A MAXIMUM STRESS IN STEEL OF 350 MPa. MODULUS OF ELASTICITY OF STEEL AND TIMBER ARE 210 GPa & 7 GPa RESPECTIVELY. B t B t PROB 04
SITUATION A: The floor system shown has the following applied loads. Super Imposed Dead Load = 2.00 kPa Live Load = 1.90 kPa Slab Thickness = 100.00 mm Weight of Concrete = 24 kN/m3 Self-Weight of the beam = 1.92 kN/m Material Specifications: f’c = 21.00 MPa fy = 345.00 MPa Steel Cover = 50.00 mm What is the maximum positive moment of beam BE, acting on the midspan? in kN-m What is the maximum steel ratio of the section located at the supports? What is the actual steel ratio of the beam section at the supports? What is the ultimate moment capacity of the beam at the supports? in kN-m What is the effective flange width at the midspan? in mm What is the height of the compression block of the section at midspan? in mm What is the ultimate moment capacity of the beam at the midspan? in kN-m What would be the height of the CHB that can be placed on beam BE? Assuming the weight of the blocks is 2.30 kN/m per meter height? in meters
Question 5 A rectangular presressed concrete beam of span 15 m and width 500 mm is loaded with a live load of 30 kN/m. The prestressing force is KN. [Take permissible stresses in concrete and steel as 15 MPa and 1200 MPa respectively]
Answer problem1
Use f'c = 30 MPa and fy = 415 MPa. The unit weight of concrete is 24 kN/m³ . The floor of a cantilever floor system is made up of a 150mm thick concrete slab (cast monolithically with beam) and the beams have widths of 300 mm, a total depth of 560 mm, and are to be reinforced with 5-Ø28 mm bars. The center-to-center spacing of beams is 4 m. The cantilever floor system is also built using 4m cantilever reinforced beams as supports. a) Find the maximum service live load (kPa) that the current floor design can support. b) Suppose that the floor will need to carry a superimposed service dead load of 2 kPa and service live load of 7.2 kPa, will the existing floor design be adequate? If not, redesign the beams (find the appropriate number of Ø28-mm rebars and provide a final sketch). Use cc = 40 mm, stirrup diameter of 10 mm, and nominal maximum aggregate size of 20 mm.
Q: In an attempt to construct a precast building, the architectural in engineer proposed a 400 mm width for a simply supported single reinforced concrete rectangular beam. Design this beam and assume your design that: fc = 25 MPa, fy = 400 MPa, L = 6 m, D.L = 160 kN/m (include self-weight), L.L = 150 kN/m, concrete weight = 24 kN/m3, bar diameter of 25 mm for longitudinal reinforcement and bar diameters 10 mm for stirrups.
Problem #1. The base of a rectangular reinforced concrete beam is 300mm and the effective depth is 550mm. Concrete compressive strength on the 28" day is 24MPA and steel yield strength is 415MP.. Determine : a. The depth of compression block (in mm, 2 decimal places), the strain in the tension steel (5 decimal places) and ultimate moment capacity (in KN.m, nearest tenth) of the beam if it is reinforced with 4-32mm diameter bars. b. The depth of compression block, the strain in the tension steel and ultimate moment capacity of the beam if it is reinforced with 4-20mm diameter bars.
Material is CONCRETE. Please check all criteria and show work clearly.
Determine the maximum and concrete and steel stresses at the point of maximum positive and negative moments
Immediately after prestressing, a post-tensioned bonded concrete beam has a prestress of 1560kN in the steel, which gradually reduces to 1330 kN. In addition to its own weight of 4.40 kN/m,the beam bears two live loads shown in the figure below. Calculate the mid-span fiber stresses: a. with full prestress and no live load in the initial conditionb. with full live load and in final condition after all losses had occurred
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