Design of Headed Anchor Bolts JOHN G SHIPP AND EDWARD R HANINGER In current practice the design of base plates is controlled by bearing restrictions on the concrete see Fig 1 shear is transmitted to the concrete largely through anchor bolts shearDesign Aid Anchor bolt Interaction of Shear and Tension Loads MARIO N SCACCO A common practice among structural engineers involved in industrial building design is to specify either ASTM A36 threaded rod bolts or A307 headed bolts for use as cast inplace anchors to carry combined shear and tension forces to the foundation 3 Load combinations shall be per ACI 318 11 9 2 4 Anchor reinft strength is used to replace concrete tension shear breakout strength as per ACI 318 11 Appendix D clause D 5 2 9 and D 6 2 9 5 For tie reinft only the top most 2 or 3 layers 1995 12 31 nbsp 0183 32 This paper describes the ultimate load capacities of typical post installed anchor bolts under static tension shear and combined tension and shear combination loads The static loading test applying tension shear and combination loads was carried out on post installed anchor bolts such as resin anchor bolt and two types of mechanical anchor bolt Anchor reinft strength is used to replace concrete tension shear breakout strength as per 17 4 2 9 amp 17 5 2 9 ACI 318M 14 Appendix D clause 17 4 2 9 and 17 5 2 9 5 For tie reinft only the top most 2 or 3 layers of ties 50mm from TOC and 2x75mm after are effective 6

2007 3 29 nbsp 0183 32 I am having trouble finding how to design an F1554 anchor bolt about 18 long for tension and shear There is plenty of info for A325 and A490 bolts in Section There is a lot of confusion on this let me try to clear it up Anchor rods yes correct terminology is rods Tension and Shear Allowable Loads for Drillco Maxi Bolt Anchors The following tables give tension and shear working stress design load allowables These loads were calculated by reducing the ultimate strength design method values for each material type by a factor of 1 7 values for each material type by a factor of 1 7 anchor tension forces and shear forces respectively The Strut and Tie Model is proposed to analyze shear force transfer from anchors to pedestal and to design the required amount of shear reinforcement A proposed design procedure is illustrated in an Anchor bolts in tension are designed according to Concrete Capacity Method in A23 3 14 Design of concrete structures – Annex D The concrete pad is assumed as unreinforced and cracked Shear force is assumed to be transferred via all anchor bolts for allo Base plate in bending and bolt in tension o Anchor bolt in shear o Assembly o Resistance o Stiffness o Classification o Worked examples o Summary Eurocodes Design of steel buildings with worked examples Brussels 16 17 October in EN1993 1 8 2005

4 2 2 Design Considerations Sleeves will not affect the design of headed anchor bolts subjected to tensile loads because the tension in the bolt is transferred to the concrete via the anchor bolt head and not by the bond between the bolt and the concrete In theLoad combinations shall be per ACI 318M 11 9 2 4 Shear load acts through center of bolt group Yec V 1 0 5 For anchor group subject to moment the anchor tensile load is designed using elastic analysis and there is no redistribution of the forces between highly stressed and less stressed anchors 6 For anchor tensile force calc in anchor Page 1 of 87 Guide on Design of post installed anchor bolt systems in Hong Kong Dr S S H Cho and Ir Prof SL Chan Department of Civil and Environmental Engineering The Hong Kong Polytechnic University published by The Hong Kong Institute of SteelCivilBay www civilbay com Design of Anchorage to Concrete Using ACI 318 08 amp CSA A23 3 04 Code Dongxiao Wu P Eng 2011 12 16 Rev 1 0 0 Page 4 of 155 Anchor Reinforcement for Tension ACI 318 08 RD 5 2 9 Anchor Reinforcement for Shear ACI 318 08This quot Bolt Stress quot analysis calculator checks allowable bolt tension and bolt shear against the applied values High strength bolts from 3 4 quot up through 1 1 2 quot diameter are assumed Effects of fatigue are considered if required Bolts can be in either single or

2009 4 29 nbsp 0183 32 Fewer bolts is not better The F nt you are calculating is the AVAILABLE tension stress based on the ACTUAL shear stress that you have in the bolts That being said you can t have F nt gt Fnt Your calcs bear that out For 7 bolts F nt 105 1ksi for 9 bolts FThe experiments show that under combined cyclic tension and shear loads anchor bolts with a stretch length of at least four bar diameters create a ductile connection compared to a The needed anchor reinforcement for cast in place anchor bolts in shear and tension was proposed in this study and applied to tests anchors installed in 2015 2 24 nbsp 0183 32 Anchor bolt embedment depth hef 14 00 in 12 00 OK Page A 1 Table 1 Pedestal height ha 18 00 in 17 00 OK Pedestal width bc 16 00 in Pedestal depth dc 16 00 in Ancholt Bolt Design With Tension and Shear Using Anchor Reinforcement 2 242019 2 3 nbsp 0183 32 Friction forces between anchor plate and concrete surface due to compression forces or bending moments are not considered in the verification for shear loads The determination of the tension forces acting on an individual anchor of an anchor group is carried out in DesignFiX in accordance with ETAG 001 Annex C and TR 029 based on the theory

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