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New member on rigid ground or existing member 1

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struggle67

struggle67

Structural
Joined
Mar 29, 2013
Messages
116
Location
SG
Hi Good Day

Eng_Tip_tqdwjg.jpg


Firstly I have never done non-suspended slab/beam design before. As shown in sketch above if I have a member with load carrying capacity a that is resting on rigid ground or existing member with load carry capacity b without composite action at the interface (i.e. no friction no interface shear strength at the interface), can I say that my total load capacity is a+b? shall I distribute the load according to their member flexural stiffness (i.e if they have same stiffness, each member both existing and new carries the same amount of load?

Thanks
 
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Two part answer. Your load will be distributed in the ratio of the stiffness of the two members.
However, when it comes to capacity, the full load carrying capacity of one member may not be utilised unless the weaker member yields.
 
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