This study investigates the seismic performance limitations of a newly constructed reinforced concrete building that collapsed during the 6 February 2023 Kahramanmaraş–Elbistan earthquake despite formal compliance with current seismic design requirements. Beyond the specific earthquake event, the study addresses a broader scientific problem: the limited understanding of the relationship between observed damage mechanisms and nonlinear dynamic response in mid-rise reinforced concrete buildings. The first part classifies recurring structural and non-structural damage patterns identified in newly constructed RC residences. The second part presents a nonlinear fiber-based static and dynamic analysis of a collapsed mid-rise building. Nonlinear dynamic analyses were conducted using ground motion records scaled to match the site-specific elastic design spectrum defined by TBDY 2018, corresponding to predefined seismic performance levels rather than an incremental dynamic analysis framework. The results indicate that an extremely low shear wall–to–floor area ratio (0.0357%) combined with asymmetric vertical element distribution significantly amplified torsional response and local shear demands. Nonlinear dynamic analyses showed that critical shear walls exceeded Collapse Prevention limits under DD2-level excitation, while system-level shear contribution limits remained within code-defined thresholds. Dynamic base shear demand corresponded to approximately 30% of the maximum nonlinear capacity obtained from pushover analysis, indicating that localized member failure rather than global strength deficiency governed the collapse mechanism. The analytically identified critical members were consistent with the observed collapse configuration, particularly at the soft ground story. The findings demonstrate that prescriptive code compliance alone may not ensure satisfactory seismic performance when structural irregularities, torsional amplification, and detailing deficiencies coexist. The results are consistent with damage patterns reported in other recent destructive earthquakes and contribute to improving the understanding of collapse mechanisms in code-compliant RC buildings.

This study investigates the seismic behaviour of the Hüsrev Pasha Minaret, a historical masonry structure located in Diyarbakır, Türkiye, characterized by two distinct transition segments and material variation along its height. The dynamic features of the minaret were identified through ambient vibration tests, while material properties were estimated using non-destructive testing methods. A three-dimensional numerical model was then generated and calibrated based on the experimentally identified natural frequencies, achieving an average frequency difference of 2.04%. Nonlinear dynamic analyses were conducted using six earthquake time series scaled to three seismic hazard levels (DD-1, DD-2, and DD-3) defined in the Turkish Building Earthquake Code (TBEC-2018). The results indicate that the second transition segment is the most critical region in terms of damage concentration. Ground motions corresponding to the DD-1 level led to exceedance of the Collapse Prevention (CP) displacement limits, while DD-2 and DD-3 levels resulted in limited or near-limit responses. In addition, compression-only support conditions were found to influence the base shear response, whereas material transitions between basalt and limestone did not significantly affect the overall seismic behaviour of the minaret.