HILTI PROFIS ENGINEERING 3.0.44
Adhesive anchor group
Example PROFIS Engineering Report for an adhesive anchor group
Group calculations are for N cbg , N ag
, V cbg
, and V cpg
|
5 Combined tension and shear loads
β N
|
β V
|
E |
Utilization β N , V [%] |
Status |
0.491 |
0.308 |
5 / 3 |
45 |
OK |
|
β NV
= β E N + β E V
<= 1
|
|
|
|
|
6 Warnings
• The anchor design methods in PROFIS Engineering require rigid anchor plates per current regulations ( AS 5216:2018 , ETAG 001 / Annex C , EOTA TR029 etc .). This means load re-distribution on the anchors due to elastic deformations of the anchor plate are not considered — the anchor plate is assumed to be sufficiently stiff , in order not to be deformed when subjected to the design loading . PROFIS Engineering calculates the minimum required anchor plate thickness with CBFEM to limit the stress of the anchor plate based on the assumptions explained above . The proof if the rigid anchor plate assumption is valid is not carried out by PROFIS Engineering . Input data and results must be checked for agreement with the existing conditions and for plausibility !
• Condition A applies where the potential concrete failure surfaces are crossed by supplementary reinforcement proportioned to tie the potential concrete failure prism into the structural member . Condition B applies where such supplementary reinforcement is not provided , or where pullout or pryout strength governs .
• ACI 318 does not specifically address anchor bending when a stand-off condition exists . PROFIS Engineering calculates a shear load corresponding to anchor bending when stand-off exists and includes the results as a shear Design Strength !
• Design Strengths of adhesive anchor systems are influenced by the cleaning method . Refer to the INSTRUCTIONS FOR USE given in the Evaluation Service Report for cleaning and installation instructions .
• For additional information about ACI 318 strength design provisions , please go to https :// submittals . us . hilti . com / PROFISAnchorDesignGuide /
• An anchor design approach for structures assigned to Seismic Design Category C , D , E or F is given in ACI 318-14 , Chapter 17 , Section 17.2.3.4.3 ( a ) that requires the governing design strength of an anchor or group of anchors be limited by ductile steel failure . If this is NOT the case , the connection design ( tension ) shall satisfy the provisions of Section 17.2.3.4.3 ( b ), Section 17.2.3.4.3 ( c ), or Section 17.2.3.4.3 ( d ). The connection design ( shear ) shall satisfy the provisions of Section 17.2.3.5.3 ( a ), Section 17.2.3.5.3 ( b ), or Section 17.2.3.5.3 ( c ).
• Section 17.2.3.4.3 ( b ) / Section 17.2.3.5.3 ( a ) require the attachment the anchors are connecting to the structure be designed to undergo ductile yielding at a load level corresponding to anchor forces no greater than the controlling design strength . Section 17.2.3.4.3 ( c ) / Section 17.2.3.5.3 ( b ) waive the ductility requirements and require the anchors to be designed for the maximum tension / shear that can be transmitted to the anchors by a non-yielding attachment . Section 17.2.3.4.3 ( d ) / Section 17.2.3.5.3 ( c ) waive the ductility requirements and require the design strength of the anchors to equal or exceed the maximum tension / shear obtained from design load combinations that include E , with E increased by W0 .
• Installation of Hilti adhesive anchor systems shall be performed by personnel trained to install Hilti adhesive anchors . Reference ACI 318-14 , Section 17.8.1
Fastening meets the design criteria !
Input data and results must be checked for conformity with the existing conditions and for plausibility ! * PROFIS Engineering ( c ) 2003-2018 Hilti AG , FL-9494 Schaan Hilti is a registered Trademark of Hilti AG , Schaan
378 NORTH AMERICAN PROFIS ENGINEERING ANCHORING TO CONCRETE DESIGN GUIDE — ACI 318-14 Provisions