題組內容

4. A shear wall in a reinforced concrete building is subjected to a vertical uniform load of intensity q and a horizontal force H(Fig. 2). As a consequence of these loads, the stresses at point A on the surface of the wall have the values shown in the second part of the figure(compressive stress equal to 8 MPa and shear stress equal to 3 MPa). Using Mohr’s circle to:


(A)Determine the principal stresses and show them on a sketch of a properly oriented element.(10分)