PART 4 SHEAR LOAD
Steel Failure Mode
Results headed stud V sa
Results 318-14 Chapter 17 Provision Comments for PROFIS Engineering headed stud
V sa
17.5.1.1 The nominal strength of an anchor in shear as governed by steel , V sa
, shall be evaluated by calculations based on the properties of the anchor material and the physical dimensions of the anchor . Where concrete breakout is a potential failure mode , the required steel shear strength shall be consistent with the assumed breakout surface .
17.5.1.2 The nominal strength of an anchor in shear , V sa , shall not exceed ( a ) through ( c ):
( a ) For cast-in headed stud anchor
V sa
= A se , V f uta
( 17.5.1.2a ) where A se , V is the effective cross-sectional area of an anchor in shear , in . 2 , and f uta shall not be taken greater than the smaller of 1.9fy a and 125,000 psi . …………………………………………………..
PROFIS Engineering AWS D1.1 headed stud portfolio parameters for calculating V sa .
ACI 318-14 Chapter 2 defines the parameter V sa as follows :
“ nominal shear strength of a single anchor or individual anchor in a group of anchors as governed by the steel strength ”.
V sa is always calculated for a single anchor when designing with ACI 318-14 provisions .
For cast-in headed studs , PROFIS Engineering calculates V sa using Equation ( 17.5.1.2a ). The PROFIS Engineering cast-in headed stud portfolio is as follows :
• AWS D1.1 Type B headed studs ( 1 / 2 ” – 7 / 8 ” nominal diameter )
The table to the left shows the parameters used by PROFIS Engineering to calculate V sa for the headed stud portfolio .
|
MATERIAL SPECIFICATION
AWS D1.1
|
GRADE OR TYPE
DIAMETER ( d 0
) ( in )
TENSILE STRENGTH ( f uta
)
( ksi )
YIELD STRENGTH ( f ya
)
( ksi )
GROSS AREA ( in 2 )
B |
0.500 |
65 |
51 |
0.196 |
B |
0.625 |
65 |
51 |
0.307 |
B |
0.750 |
65 |
51 |
0.442 |
B |
0.875 |
65 |
51 |
0.601 |
|
EFFECTIVE AREA ( A se
)
( in 2 )
|
Reference the Equations and Calculations section of the report for more information on V sa
.
Reference the Variables section of the report for more information on the parameters A se , V and f uta
.
|
307 NORTH AMERICAN PROFIS ENGINEERING ANCHORING TO CONCRETE DESIGN GUIDE — ACI 318-14 Provisions