PSI - Issue 77

Ercan Işik et al. / Procedia Structural Integrity 77 (2026) 465 – 474 Ercan Işik et al./ Structural Integrity Procedia 00 (2026) 000 – 000

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Fig. 6. 2D and 3D models of the sample RC structure model.

The parameters considered in the numerical modeling are shown in Table 1.

Table 1. Characteristics of the numerical model.

Parameter

Value

Concrete Class Reinforcement Class

C20/25

S220

Beams ( mm )

250*500 mm

Slab Thickness ( mm )

120 mm

Story Height

3 m

Concrete Cover Thickness ( mm )

25 mm

Columns

400*400 mm

Corner

4Φ16 4Φ16 4Φ16

Longitudinal reinforcement (columns)

Top and bottom edges Right and left edges

Transverse reinforcement (Columns) Transverse Reinforcement (Beams)

Φ8/100 -200-300-500

Φ8/200

Soil class

ZA 5%

Damping ratio Importance class

II

Target displacement (6-stories)

0.36 m

The primary aim of performance-based earthquake engineering is to determine the performance of structures under different limit states. In the SeismoStruct software, demand and limit values for shear forces were obtained through the definition of performance criteria. Comparisons were made by selecting the same transverse reinforcement spacing for all columns. In the numerical analyses, the transverse reinforcement spacing was taken into account as the first variable. Five different transverse reinforcement spacing's, such as 100 mm , 200 mm , 300 mm , 400 mm and 500 mm , were taken into consideration. The comparison of demand and limit shear values for the columns as a result of the structural analysis is presented in Table 2. In all of these models, 135º angled bends were used. In order to make comparisons, all other structural characteristics are taken as constant.