I need the step by step solution The two-span continuous beam shown in Fig. 4.17

Question

I need the step by step solution

The two-span continuous beam shown in Fig. 4.17 is subjected to a uniform dead load of 2 6 K/ft (including its own weight) and a uniform live load of 3 K/ft. The reactions due to two different loadings are also shown. Calculate the maximum negative factored moment at the intermediate support B and the maximum positive factored moment within the span AB (at 0 42L from support A), design the critical section at B and D, and draw the reinforcement details for the entire beam ABC Figure 4.17 Problem 4.14.

Explanation / Answer

Ultimate load W = 7.9 k/ft

MB( maximum negative) = -395 K.ft

MDmax = 270.8 k.ft

b) ?Mn = 344.6 k.ft < Mu Compression steel is needed.

AS = 5.04 i n. 2 Use 7 # 8 ( two rows)

AS'= 0.64 in.2 ; AS1 = 3.12 in.2 ;Use 4#8 bars in one row, ( A S = 3.16 in^2 )

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