Calculate the spacing between contraction joints for a two lane 250 mm thick concrete road having 3.5m wide slab. Unit weight of concrete = 24 kN/m3. Ultimate stress in tension = 0.16 N/mm², coefficients of friction at interface = 1.5, and the factor of safety = 2. %3D %3D Also calculate the spacing between expansion joints if the increase in temperature is 20°C, the expansion joint gap is 24 mm and the thermal coefficient = 10 x 10-6 per C.

Calculate the spacing between contraction joints for a two lane 250 mm thick concrete road having 3.5m wide slab. Unit weight of concrete = 24 kN/m3. Ultimate stress in tension = 0.16 N/mm², coefficients of friction at interface = 1.5, and the factor of safety = 2. %3D %3D Also calculate the spacing between expansion joints if the increase in temperature is 20°C, the expansion joint gap is 24 mm and the thermal coefficient = 10 x 10-6 per C.

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

Reinforced concrete
Question A prestressed concrete rectangular beam has area of cross-seciton equal to 36000mm² and moment of inertia of 2.7 x 108 mm4. A prestressing force of 195 kN is applied by tendons at an eccentricity of 55 mm from neutral axis. The loss of stress in steel due to creep of concrete is N/mm². [Take E = 2 × 105 N/mm², Ec = 3 x 105 N/mm² and creep coefficient = 1.50]
Prob.5: A rectangular reinforced concrete beam has dimensions b = 300 mm, d = 530 mm and h = 600 mm, and is reinforced with 3 Ø32 mm bars. Materials strength are fe = 28 MPa, fy= 414 MPa. a) Find the moment that will produce the first cracking at the bottom surface of the beam basing your calculations on Ig. b) Determine the maximum stress in the steel and in the concrete under this Design of Reinforced Concrete Structures moment.
Reinforced concrete
A rectangular plate is subjected to uniform biaxial stress with x = 90 MPa (tension), oy = -20 MPa (compression), and ₂ = 0. The plate has original dimensions 400 X 800 X 200 mm (x X y X z) and is made of steel with E = 200 GPa and v = 0.3. What are the strains Ex, Ey, and Ez?
The following are properties of the reinforced concrete beam shown, f, = 60,000 psi and Sc = 4,000 psi . Determine the distance from the top 12 in 3 in. of the beam the centroid of the effective area of the concrete subjected to the compressive stress 0.85 f. . 27 in. 33 in 30 in. 4 #11 3 in. 18 in. O 3.47 in. O 7.43 in. 4.73 in. O 3.74 in.
Steel railroad rails 10 m long are laid with end-to-end clearance of 3 mm at a temperature of 15°C. (a) At what temperature will the rails just come in contact? (b) What stress would be induced in the rails at that temperature if there were no initial clearance? Use a = 11.7 x 106 /°C and E = 200 GPa.
02: The rigid platform has negligible mass and rests on two steel bars, each 250.00 mm long. The center bar is aluminum and 249.90 mm long. Compute the stress in the aluminum bar after the center load P= 400 kN has been applied. For each steel bar, the area is 1200 mm2 and E= 200 GPa. For the aluminum bar, the area is 2400 mm2 and E 70 GPa Rigid platform Steel Ahmum Steel
Problem: A steel rod with a cross-sectional area of 180 mm2² is stretched between two fixed points. The tensile load at 25°C is 3,600N. Assume thermal coefficient equal to 11.7 x 106 mm/ (mm°C) and E= 200 GPa. a. What is the temperature at which the stress will be zero? b. What is tthe temperature at which the compressive stress will be 48 MPa?
A prestressed concrete beam of rectangular section 300mm wide and 600mm deep is prestressed by 5 pieces of 8mm high tensile wires at 500mm from the top and 15 pieces of 8mm diameter high tensile wires at 83 mm from the bottom. The initial stress in the wires is 1200 MPa. Estimate the loss of stress in the bottom wires due to elastic shortening of concrete. Assume modular ratio = 6.