Building Parameters

Number of floors

Floor height h (m)

Total height H (m)

Auto-computed from floors × h if blank

Total seismic mass (t)

Structural system

Ductility class

Behaviour factor q (auto from system)

Auto-set from structural system and ductility class. Override for specific capacity design.

Soil class (EN 1998-1 Table 3.1)

Spectrum type

Seismic zone (a_gR in g)

Importance class

Seismic Results

21930

F_b (kN) — Base shear

T₁ (§4.3.3.2.1) 0.409 s

S_d(T₁) 0.0516 g

Behaviour factor q 4

γ_I (importance) 1

a_g 0.1 g

λ (mode factor) 0.85

Total mass 500 t

Storey forces (§4.3.3.2.3)

F₁

3655 kN

F₂

7310 kN

F₃

10965 kN

Design spectrum S_d(T)

S_d(T_B) 0.0844 g

S_d(T_C) 0.0844 g

S_d(T_D) 0.0176 g

Interstorey drift (§4.4.3.2)

d_max 0.016 m

d_r = q·d_e Compute elastic drift → amplify

        EN 1998-1:2004 §3.2.2, §4.3.3.2, §4.4.3.2
      