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