Cantilever Beam & Maritime Structures Permanently Submerged  In Sea Water - Science & Math Assignment Help

Assignment Task

Problem: 
A singly reinforced cantilever beam in the figure below is a part of maritime structures permanently submerged  in sea water. The beam carries a triangular live load q and a triangular superimposed dead load g (in addition  to its self-weight) as shown in the figure. The beam also carries an imposed live load of 50 kN at the end of  the beam. The width and total depth of the beam are 350 mm and 650 mm, respectively. The effective span  length (L) is 5.0 m. The reinforcement is composed of normal class steel bars (Es = 200000 MPa; fsy = 500  MPa). The specific gravity of the concrete is 25 kN/m3, N32 steel bars are to be used as tensile reinforcement  and R10 stirrups are to be used for shear reinforcement.

g (at point A) = 20 kN/m 
q (at point A) = 20 kN/m 
g (at point B) = 0 
q (at point B) = 0 kN/m 
P = 50 kN

Ultimate Limit State 
1) Calculate the effective depth of the beam which satisfies the durability requirement as per AS 3600.  Also calculate the Modulus of Elasticity of Concrete. 
2) Calculate the maximum design bending moment at Ultimate Mu*.
3) Calculate the tension reinforcement needed and carry out the design check.  
(4) Calculate the spacing between the reinforcement bars and comment if single or double layer of  reinforcement is needed. Also, draw the cross-section of the beam clearly showing all the  dimensions, tension reinforcement (number of bars with spacing) and stirrups.
 5) Calculate the tension reinforcement if the beam has to have a balanced failure. Also carry out the  design check.

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