lab3 - University of California at Berkeley Spring Semester...

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University of California at Berkeley Spring Semester 2009 Department of Civil Engineering Instructor: Khalid M. Mosalam CEE123 -- Reinforced Concrete Design Laboratory Assignment 3 (Due at beginning of next Laboratory Session) Design Moments and Shears At this stage of design, bending moments and shears can be determined from an analysis of the building frames. Because of the difficulties in determining effective stiffness of cracked floor systems and the routine (repetitive) nature of such designs, the ACI code permits moments and shears to be estimated in many instances by means of simple yet conservative moment and shear coefficients (e.g. ACI Section 8.3.3, attached). Alternately, standard analysis methods can be used. Alternative Structural Systems It is common to consider many alternative structural systems. For the joist system considered in Laboratory 2, the spans could change. Note that in the following alternatives, joists are oriented different from those in Laboratory 2. Also when the alternative in Laboratory 2 is mentioned, assume that joists are oriented as in this
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