Load Analysis: A floor beam is used to support the 3-m width of a reinforced concrete slab having a thickness of 120 mm. The slab serves as a portion of the ceiling for the floor below and it’s bottom is coated with plaster. Furthermore, a 2.75-m high, 12.5-cm thick lightweight solid concrete block wall is directly over the top flange of the beam. The cross-sectional area of the wide flange steel beam is 36,645 mm2. Determine the total dead load carried by the steel beam (expressed in k

Load Analysis: A floor beam is used to support the 3-m width of a reinforced concrete slab having a thickness of 120 mm. The slab serves as a portion of the ceiling for the floor below and it’s bottom is coated with plaster. Furthermore, a 2.75-m high, 12.5-cm thick lightweight solid concrete block wall is directly over the top flange of the beam. The cross-sectional area of the wide flange steel beam is 36,645 mm2. Determine the total dead load carried by the steel beam (expressed in k

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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For a simply supported prestressed concrete bearn, compute the stress in the top fiber at midspan due to prestressing force and service loads after transfer. Loss of prestressing force = 20%. Properties of the beam are: Width of the bearn, b: 242 mm; Depth of the %3D beam, d: 417 mm; Concrete cover of the bearn, cc: 61 mm; Prestressing Force, P: 574 KN; Superimposed Load, w: 14 KN/m; Length of the beam, L: 9 m. Stress is in unit MPa. Write only the value of your final answer. w (including selfweight) W „P.
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The reinforced concrete beam shown has a width of 400 mm and a total depth of 610 mm. It is loaded with a super imposed dead of 25 kN/m, and live load of 12 kN/m. Pdl =60kN and Pll = 40kN There are 3-25mm diameter bars arranged in a single layer at the bottom of the beam, with a clear covering of 50 mm. Another 2 -20 mm diameter bars are located at the top of the beam with the same clear covering. Determine the critical spacing of 10mm diameter stirrups. Use f = 28MPa, fy = 420 MPa, fyt = 275 MPa. P in KN P in KN w in kN/m Steel I Generic 7.0 m 2.0 m 5.0 m
A prestressed concrete beam of section 250 mm wide by 600 mm deep is used over an effective span of 10 m to support an imposed load of 8 kN/m. If the unit weight of concrete is 25 kN/m³, find the magnitude of: (a) the concentric prestressing force necessary for zero stress at the bottom fibre at the midspan section when the beam is fully loaded. (b) the eccentric prestressing force of the tendon located at 200 mm from the soffit of the beam that would nullify the flexural stress due to the combined dead and imposed load. (c) Discuss the implication of the results in (a) and (b) above.
2. A reinforced concrete beam having a width of 280 mm and a total depth of 600 mm is reinforced for tension at the bottom with 6 - 36 mmɸ bars placed on two layers, 4 bars on first layer and 2 bars on second layer. Compute the effective depth of the beam and the clear horizontal spacing between bars.
A one way slab has a total depth of 200mm with a 20mm clear cover at the bottom. The steel reinforcement is 20 mm diameter spaced at 125mm on centers. Use f'c = 30 MPa and fy = 400 MPa. 1) Determine the depth of the stress block for a strip of slab. 2) Determine the moment capacity of the strip of slab. 3) Determine the live load per sq.m. that the slab can carry if the slab were used on a 3m simple span. Concrete mass maybe taken at 2500 kg/m³ which includes the weight of reinforcement. Use 2015 NSCP. SDL can be taken as 12 kPa/m.
A 250mm x 600mm 10m-simple span prestressed concrete beam has a uniformly distributed dead load of 8.50 kN/m in addition to its weight. The tendons are placed 100mm from the bottom of the beam and is subjected to initial prestress force of 1880 kN. The beam is used to carry a live load of 25 kN/m. If the unit weight of concrete is 24 kN/m3, determine the stress at the bottom fiber of the beam at midpan after 20% of the losses at its final stage CS Scanned with CamScanner
1. Load Analysis: A floor beam is used to support the 3-m width of a reinforced concrete slab having a thickness of 120 mm. The slab serves as a portion of the ceiling for the floor below and it's bottom is coated with plaster. Furthermore, a 2.75-m high, 12.5-cm thick lightweight solid concrete block wall is directly over the top flange of the beam. The cross-sectional area of the wide flange steel beam is 36,645 mm2. Determine the total dead load carried by the steel beam (expressed in kN/m). Material Concrete, plain cinder Reinforced concrete Masonry, lightweight solid concrete Masonry, normal weight concrete Steel, cold-drawn Aluminum *Plaster on concrete Unit Weight - kN/m ³ 17.0 23.6 16.5 21.2 77.3 26.7 0.24 kPa
The floor system of a residential building consists of 125mm thick reinforced concrete slab (unit weight = 23.6 KN/m^3) resting on three 8m spanned RC floor beams spaced at 3.2 meters on centers. Size of RC beam is 200mm x 450mm. NSCP 2015 Load factors: 1.2DL & 1.6LL. Assume simple supports. Question: True or False? The RC slab described above is ONE-WAY slab.