PROBLEM 1A reinforced concrete beam has a width of 250mm and a total depth of 450mm. It is reinforced with atotal steel area of 1875sq.mm placed at an effective depth of 375mm. Assume f'c = 27.6 MPa and fy =414.7 MPa. Discuss and determine the following:(a) Depth of the compression block(b) Moment capacity reduction factor,(c) B₁(d) Mn and Mu(e) Safe uniform live load that the beam could carry in addition to a uniform dead load of 20 kN/m if thebeam span is 6.0m.PROBLEM 2A T-beam (internal) for a floor system has a slab thickness of 100mm and a total depth of 550mm. It hasa web thickness of 300mm. The T-beam is casted monolithically with the slab. The beam has a simple spanof 6.0m with a spacing of 2.4m center to center. The beam carries a live load moment of 163 kN.m and adead load moment of 84 kN.m. Assume f'c = 20.7 MPa and fy = 413.7 MPa. Assume steel covering to thecentroid of the reinforcement is 65mm. Determine the following and discuss your solution:(a) Effective width of flange(b) Depth of compression block(c) Steel area required

Given reinforced concrete beam with area of steel 1875mm2 with effective depth of 375mm. It is…

PROBLEM 1 A reinforced concrete beam has a width of 250mm and a total depth of 450mm. It is reinforced with a total steel area of 1875sq.mm placed at an effective depth of 375mm. Assume f'c = 27.6 MPa and fy = 414.7 MPa. Discuss and determine the following: (a) Depth of the compression block (b) Moment capacity reduction factor, (c) B₁

PROBLEM 1 A reinforced concrete beam has a width of 250mm and a total depth of 450mm. It is reinforced with a total steel area of 1875sq.mm placed at an effective depth of 375mm. Assume f'c = 27.6 MPa and fy = 414.7 MPa. Discuss and determine the following: (a) Depth of the compression block (b) Moment capacity reduction factor, (c) B₁

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

See similar textbooks

Similar questions

A rectangular concrete beam 400 mm wide and effective depth of 700 mm. It is reinforced with five 28-mm diameter bars for tension only. Concrete strength is f'c= 21 MPa and steel yield strength fy = 275 MPa.a. Determine the depth of the rectangular compression stress block.b. Determine the ultimate moment capacity of the beam.
f’c = 28 fy = 415 Mpa ex= 320mm a. Calculate depth of neutral axis b. Calculate the stress in extreme compression reinforcement in Mpa
A rectangular doubly-reinforced beam 450 mm wide and reinforced by 5-32mm diameter bars for tension and 3-28 mm diameter bars for compression and has the following properties: (NSCP 2010) d = 650 mm d’ = 70 mm f’c = 20.7 MPa fy = 344.80 MPa a. Find the depth of compression block. b. Find the ultimate moment capacity of the beam.
A rectangular reinforced concrete beam with width of 350 mm and effective depth of 600 mm is subjected to 250 Kn.m bending moment. the beam is reinforced with 6-25 mm bars. Use alternate design method and modular ratio, n = 10. a. find the location of the neutral axis from the bottom of the beam & moment of Inertia. b. Find the maximum stress of concrete and steel c. total compression force in concrete?
A rectangular pre-tensioned prestressed beam has a width of 300mm, a total depth of 600 mm, and a simply supported span of 16m. Grade 1725 stress relieved prestressing tendons are placed at a constant eccentricity of 130mm. The total area of the tendons, subjected to an effective prestressing force of 637.5 KN, is equal to 650.3 sq.mm. Use Eps = 186 MPa, fc’ = 35 MPa and R = 0.25. It is expected that at the time of transfer, the concrete must have reached 75% of its specified strength. Assume that the maximum moment during service loads is 720 KN-m (due to sustained loads). Note : evaluate the allowable stresses given by the code using an uncracked sections. Calculate the concrete stresses at the critical sections during the initial stage. Calculate the concrete stresses at the critical sections during the final stages of loading. Is the section adequate during initial stage?
A wooden beam 150mm wide by 300mm deep is loaded as shown. If the maximhm flexural stress is 8MN/m^2. Find the maximum values of1.)W(kN/m)2.) P (kN)
2. A reinforced concrete beam having a width of 280 mm and a total depth of 600 mm isreinforced for tension at the bottom with 6 - 36 mmɸ bars placed on two layers, 4 bars onfirst layer and 2 bars on second layer. Compute the effective depth of the beam and theclear horizontal spacing between bars.
A simply supported rectangular beam of length 6.45m has a width of 437.5 and an effective depth of 692.5. The beam is to be reinforced using 12 mm bars. The beam supports service dead loads of 31 kN/m and 39.5kN/m., respectively. the fc' is 28MPa, fy is 420MPa and Wu is 89.9kN/m. 1. what is the ultimate moment capacity of the beam? 2. what is the height of the equivalent stress block? 3. Determine the number of bars required for this beam
The simple beam carries a concentrated load P = 15kN. Dimension a and b are 2.5m and 1.2m. respectively. What is the required section modulus of the beam, in mm^3, if the stress is 120Mpa?
A beam section is shown in the figure. The beam will be subjected to a maximum service dead load of 215 kN.m. (including its own weight). Use f’c = 21 MPa and fy = 415 MPa. a.) Determine the effective depth of the beam. b.) Determine the distance of the neutral axis to the extreme compression fiber. c.) Determine the safe live load moment for this beam.
Q3: Cooling tower made of concrete material, having a length of 360 m and constant thickness of 2 m, carries its own weight. In addition, it is assumed that a constant wind force of q = 2 kN/m affects the tower horizontally from left to right through the height of the tower. The outer diameter of the tower varies depending on x as d = 20 – 0.1 x + 0.00035 x2 , where d and x are in meters. The specific weight of the concrete is 24 kN/m3. According to this; (a) Find the values of the cross-section effects affecting on the cross section of tower at the height of 180 m. Show these cross-section effects on the cross section in the correct directions in accordance with the axis set.(b) Find the maximum normal stress that occurs on the cross section at the height of 180 m.
Refer to the figure below.The square steel tube carries 100kN of axial compressive force. Compute the compressive stress in the tube and the bearing stress between each contacting surface. Consider the weight of the concrete pier to be 1000 N.