Shakeel Sarmad, Khan Saadan Hussain, Saqib Syed Aayan, Khan Muhammad Awais, Moiz Muhammad Abdul
Department of Civil and Structural Engineering, The University of Sheffield, Sheffield, S1 3JD, UK.
Institute of Civil Engineering, National University of Sciences and Technology (NUST), H-12, Islamabad, Pakistan.
Sci Rep. 2024 Jul 16;14(1):16349. doi: 10.1038/s41598-024-67373-3.
The transition from the Uniform Building Code (UBC-97) to the International Building Code (IBC-21) marked a major shift in the definition of seismic hazard. The term "seismic hazard" in the form of peak ground acceleration (PGA) is replaced by spectral acceleration. This paper investigates the effect of using new seismic hazards on the structural performance of reinforced concrete (RC) buildings. It also looks into the financial impact on the capital costs of new buildings. Useful insights are made to understand the structural performance and financial impact of adopting IBC 21 for structural design in contrast to UBC 97. This study was carried out from the perspective of a developing country, Pakistan. Reinforced concrete moment resisting and dual frames are used as the main structural system of a typical 7-story residential building to investigate the aforementioned effect. The frames are assumed to be located in two locations with high and low seismic hazards. The effect on structural performance is investigated via nonlinear pushover analysis. Financial impact is judged mainly through cost estimation for steel and concrete. A detailed discussion is also presented on the seismic design guidelines in both codes.
从《统一建筑规范》（UBC - 97）到《国际建筑规范》（IBC - 21）的转变标志着地震危险性定义的重大转变。以峰值地面加速度（PGA）形式表示的“地震危险性”术语被谱加速度所取代。本文研究了采用新的地震危险性对钢筋混凝土（RC）建筑结构性能的影响。同时也探讨了对新建建筑资本成本的财务影响。通过对比，得出了一些有用的见解，以了解采用IBC 21而非UBC 97进行结构设计时的结构性能和财务影响。本研究是从发展中国家巴基斯坦的角度进行的。采用钢筋混凝土抗弯框架和双重框架作为典型7层住宅楼的主要结构体系，以研究上述影响。假定这些框架位于地震危险性高和低的两个地点。通过非线性推覆分析研究对结构性能的影响。财务影响主要通过钢材和混凝土的成本估算来判断。此外，还对两部规范中的抗震设计指南进行了详细讨论。
