Structural Mechanics Comprising the Strength And Resistance of Materials And E
Structural Mechanics Comprising the Strength And Resistance of Materials And E
Charles E Charles Ezra Greene
The book Structural Mechanics Comprising the Strength And Resistance of Materials And E was written by author Charles E Charles Ezra Greene Here you can read free online of Structural Mechanics Comprising the Strength And Resistance of Materials And E book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is Structural Mechanics Comprising the Strength And Resistance of Materials And E a good or bad book?
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bh 3 1 6 Rectangle $ h bh 12 ft h* 6 Square \h h* -=- 12 h 7T(/ 4 8 Circle %d fad 2 64 a bh*-Vh* .. , 7, 6h(bh-b'h') Hollow rectangle. .. - \h bhr 1 -' 12 Hollow circle. 64 125. The Middle Third. The mean or average unit stress is always found at the centre of gravity of the cross -section. On sections symmetrical about the neutral axis the fibre stress can be zero at one edge only when the fibre stress on the oppo- site edge is twice the mean, that is, when or ;yo = -. COMPRESSION PIECES. 139 ...This condition is satisfied for a rectangle when yo = JA. Hence for a rectangular section in masonry the centre of pressure must not deviate from the centre of figure more than one-sixth of the breadth in either direction, if the unit stress at the more remote edge is not to be allowed to become zero or tension. As masonry joints are supposed in many cases not to be subjected to tension in any part, the above statement is equivalent to say- ing that the centre of pressure or line of the resultant thrust must always lie within the middle third of any joint.
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