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Anchor Bolt Force Calculation

 
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ychodneker
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PostPosted: Sun Jan 28, 2018 9:47 am    Post subject: Anchor Bolt Force Calculation Reply with quote

Dear Sefians,

By ref ACI 349.2R solved examples and ACI 318, it is easy to understand about calculating the forces in 4 no of anchor bolts , but how to calculate forces in anchor bolts when they there are more than 4 in number ?

http://www.civilbay.com/Tech-Writing/Design-of-Anchorage-to-Concrete-Using-ACI-318-08-&-CSA-A23.3-04-Code.htm#_Toc308014767

In example no 4 it is easy to understand with 4 number of anchor bolts. It is possible to find out T1 = 55.16kN using equilibrium equations summation of vertical and moments equal to zero.


Please check example number 13 it has a six anchor bolt pattern. We have 3 unknowns and 2 equlibrium equations, in that case ow is T1 = 4.86kips and T2 = 2.15kips calculated ?

Please help.

Thanks.
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niladrisamanta
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Joined: 14 Dec 2017
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PostPosted: Tue Feb 20, 2018 6:13 am    Post subject: Anchor Bolt Reply with quote

And in addition in reference to the ICJ VOL 74, NO 7 published by Dr.N Subramanina The surface of the concrete cone is (1.5hef+1.5hef+s1) on one side based on CCD method what i understand is  ; hef is the embedded length, if the embedded depth is 600mm the  surface of the concrete pullout cone will be 3*600+S1=1800mm+S1.
that means it is much more greater that the pedestal size itself? please clarify...
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