Product Technical Guides : US-EN Cast-In Anchor Channel Fastening Technical Guide | Page 394

1 . Anchor Channel Systems
2 . HAC Portfolio
3 . HAC Applications
4 . Design Introduction
5 . Base material 6 . Loading
7 . Anch Desig
7.6.5 ANALYSIS IN SCD A OR AND SDC C , D , E OR F
Seismic tension Seismic Loading ( SDC C , D , E and F )
Nominal bending strength of the anchor channel for seismic design HBC-C-N and HBC-T
ϕ M s , flex , seis ≥ M u , flex M s , flex , seis and ϕ are tabulated in Table ESR-3520 Table 8-3
All anchor channels systems in a test series shall complete the simulated seismic-tension load history . Subject the anchor channel to the sinusoidal tension loads with a cycling frequency between 0.1 and 2 Hz . All anchor channels systems in a test series shall complete the simulated seismic-tension load history specified . Failure of an anchor channel system to develop the required tension resistance in any cycle before completing the loading history shall be recorded as a failure of an anchor channel system to develop the required tension resistance in any cycle before completing the loading history . Test No . 12 is performed to extract seismic strength values for various failure listed above .
Nominal tensile strength of a channel bolt for seismic design
ϕ N ss , seis ≥ N b ua
N ss , seis and ϕ are tabulated in Table ESR-3520 Table 8-10
Nominal tensile steel strength for local failure of channel lips for seismic design
ϕ N sl , seis ≥ N b ua
N sl , seis and ϕ are tabulated in Table ESR-3520 Table 8-3
Nominal tensile steel strength of a single anchor for seismic design
ϕ N sa , seis ≥ N aua
N sa , seis
, and ϕ are tabulated in Table ESR-3520 Table 8-3
Figure 7.6.4.1 — Required load history for simulated seismic tension test
Nominal tensile steel strength of connection between anchor and channel for seismic design
Table 7.1-a — Required load history for simulated seismic tension test
Load level N eq
N l
N m ϕ N sc , seis ≥ N aua
N sc , seis and ϕ are tabulated in Table ESR-3520 Table 8-3
Number of cycles 10 30 100
Anchors in structures assigned to Seismic Design Category ( SDC ) C , D , E , or F shall satisfy the additional requirements
According to section ACI 318-14 section17.2.3.4.4 0.75ϕN pn for a single anchor , or for the most highly stressed individual anchor in a group of anchors . ϕ seis is 0.75 .
AC232 Table 4.2 — Optional test program for anchor channels for use in uncracked and cracked concete for shear loading in longitudinal channel axis and for siesmic loading ( SDS C , D , E and F )
Test no . Test Ref Test description f c ∆w
Minimum No . of tests
Channel Anchor Material
Channel bolt
d s
strength
[ - ]
Secion in Annex A
[ - ]
psi [ N / mm 2 ]
inch ( mm )
[ - ] [ - ] [ - ] [ - ]
inch ( mm )
[ - ]
Seismic Tests
12
7.12
Seismic tension
Low
0.020
( 0.5 )
5 see Section 7.12.2 1
13
7.13
Seismic shear perpendicular
to the channel profile
Low 0 5 see Section 7.13.2 1
14
7.14
Seismic shear in longtitudinal
channel axis
Low 0.020 ( 0.5 )
5 see Section 7.15.2 1 198