To Analysis and Design of Steel Structures using TSD
1. After results are obtained , for deflection when values are higher we need to consider by resizing the member sizes varying untill the deflection criteria is under permissible limit. ( 40 mm) . It checks under limit state of serviceability . Deflection limits as per IS 800 table 6 span to depth ratio for economical sections
bracings carry axial load thus help in stability of member .Bracing connection where resultant of tension and compression of a member is combined within vertical / horizontal axial forces , shear forces .
shear connectors are useful to withstand shear forces & moments to encounter in a load carrying capacity section
For maximum shear , BM , deflection values then design the member accordingly to meet the design parameters .
Shear force , BM are considered for connection of section
For simply supported we consider shear force , major moment , axial force for design of members ( shear connection)
shear connectors are connected to web of the member , for moment is under flanges of member
Shear force - Stiffners , purlins are provide to member to satisfy the criterior .
BM is 0 at ends and maximum at midspan , Sf varies from one end to another end .
2. Bearing capacity of member checked under soil report , one way shear& 2 way shear is consider for depth of foundation . Bearing capacity determine the sizing of foundation , one way shear& 2 way shear gives thickness of foundation
If member fails in bending consider resizing of depth and reinforcement
For pedestal to base plate we consider supports condition and keep structure un restrained by checking maximum reaction loading
moment connection it is necessary to provide stiffners / bolts at the joint for inline of moment transfer , then we check moment , axial load & shear force can design bolt connection . splice is connection between the same member as forces can be transfered is used when the span is too big . It can be design under full moment capacity / design needs is encounterd where the moment has low values .
For simple moment connection at joints we consider bolts / welding of members