Does Ram connection consider shear value for Base plate design ?
Sure, we design anchors or shear lugs according to various design codes.
Wants to know whether shear value in consideration during base plate design not anchors.
The welds are checked for shear, but not the plate. The plate checked for bending.
But as per Design guide 1,1st ed shear force is converted to tension as per attached pic,
Page 36.
You said the plate a moment ago, now you are back to the anchors. We use the ACI Appendix D methods for anchor shear and tension interaction.
I am attaching you some image and doc of DG 01,ED 01.also attached rcnx. file.
Shear check.rar
You can see,in the DG shear is converted to tension and this converted tension is added with the tension. and base plate moment is calculated using the increased tension.but in the ram connection I find no changes in anchor tension,changes only in shear.and no changes for in base plate bending for shear.
Hello Nazmul,
The AISC base plate design is based on the AISC Design Guide 1 Second Edition. According to the DG1 section 3.5, the shear in a base plate design can be handled in three ways:
By default RAM Connection checks the shear in anchors, that is why you see all the shear capacities being calculated according to the ACI 318 Appendix D.
If you want consider the friction between the base plate and the concrete you need to check the “Include friction between base plate and support” option in Design criteria. This will enable the friction calculation which can be calculated just for the plate or Include it in the anchors shear capacity.
If it is just for the plate a new capacity is added in the base plate section called “Friction shear capacity”. This depends on axial compression so for a base plate under tension the friction capacity will be zero.
If you want the friction to be considered as a contribution of the anchor shear capacity then you need to check “Include anchor contribution to friction resistance”. This will include the friction contribution to the anchor shear resistance.
Finally, shear can also be resisted by a shear lug. If this is the case you need to check the option "Include shear lug".This will enable all section capacities for the shear lug.
Attached some screenshots to guide you in each option.
PDF
Is there a way that RAM Connection will check the anchor bolts per AISC DG 1? I am referring to the tension/bending/shear interaction due to bending in the anchors when oversized holes and welded washers are used.
Hello Andrew, RAM Connection base plate design is based on the AISC DG 1. As it is mentioned in the design guide, the interaction for tension and shear is done following the ACI 318 approach for both steel and concrete limit states. Could you please point out the section on the DG1 with your requirement.