Seismic Anchorage of Structural Walls (ASCE 7)

Calculate the minimum seismic anchorage forces of structural walls as per ASCE 7 cl. 12.11

Code:
US flagASCE 7
Hw(in)

Height of wall tributary to support or anchor

Constraints
min: 0step: 0.1
b(in)

Width of wall tributary to support or anchor

Constraints
min: 0step: 0.1
Wp(psf)

Unit weight of wall

Constraints
min: 0step: 1
Sds(g)

Design spectral acceleration at short periods

Constraints
min: 0step: 0.01
Ie

Seismic importance factor

Constraints
min: 0step: 0.1
Lf2(ft)

Span of the flexible diaphragm that provides support for the wall

Constraints
min: 0step: 1
wall anchorage forces

Calculation Steps:

    Determine weight of wall tributary to anchor or support
    • W

      Tributary weight of wall

      lb
    Determine minimum out-of-plane force
    • Fpo

      Out-of-plane seismic anchorage force

      lb
    Determine minimum in-plane force
    • ka

      Diaphragm amplification factor

    • Fpi

      In-plane seismic anchorage force (flexible diaphragm)

      lb
    User Notes: