Structural Engineering

Structural Engineering

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1908 edition. Excerpt: ...otherwise the effect of corrosion, should it take place, would cause a large reduction of available area. From the considerations in Chapter VI. it will be evident that the vertical and horizontal planes are not the planes of principal stress, therefore the normal stress on a vertical section is not the maximum intensity of stress at a point. But in the flange, as has already been shown, the intensity of shearing stress is very small, therefore the normal stress on the vertical plane in the flanges differs very little from the maximum, and one plane of principal stress very nearly coincides with it. In the web, however, particularly towards the ends of the girder, the intensity of shearing stress is very appreciable. At the neutral axis the direct stress is zero, and there is only shear on the vertical and horizontal planes there, therefore the planes of principal stress there would be at angles of 45 deg. with the vertical and horizontal lines, and the intensity of tension or compression would be equal to that of the shearing stress. At j the upper and lower extremities of the web the intensity of normal stress is evidently the same as in the flanges at these levels, consequently in the compression portion of the web the greater principal stress will be a compression and greater than the intensity of compression in the flange, and will act on a plane inclined to the vertical. A similar consideration applies to the tension portion of the web. This is evident from equations (4A), Chapter VI., which show that in this case the maximum p -Jp2 + 4p principal stress = p =--, the second term being taken as the same sign as p1n; and the cotangent of the inclination of its normal to the horizontal =---. Pt For example, if the more

Product details

  • Paperback
  • 189 x 246 x 4mm | 168g
  • United States
  • English
  • black & white illustrations
  • 1236824377
  • 9781236824370