Comparison of the LRFD Method and the Performance-Based Method in the Design of Mid-Rise Reinforced Concrete Moment Frames under Blast Loading

Document Type : Original Article

Authors

1 PhD, Department of civil engineering, SR.C., Islamic Azad University, Tehran, Iran.

2 Assistant Professor, Faculty of Technology and Engineering, Ayatollah Boroujerdi University, Boroujerd, Iran.

3 Professor, Faculty of Technology and Engineering, Lorestan University, Khorramabad, Iran.

Abstract

In the design of structures, especially blast design, if the design method is not selected correctly, the proposed design may be uneconomical or unsafe. Since there is no method such as using behavior coefficient in blast design of structures, and the behavior coefficient available for seismic design of structures does not apply to the behavior of structures against blast. Therefore, this research compares the design using the LRFD method and the         performance-based design in two 5-story reinforced concrete frames with a semi-buried reinforced concrete shear wall under a 10-ton TNT blast load located 30 meters away from the structure. Initially, the models were designed using the LRFD method by performing linear dynamic analyses. In the next stage, the aforementioned models were designed using the performance-based design method to provide three performance levels of uninterrupted operation, life safety, and collapse threshold. The results show that the acceleration value of all floors in the LRFD method is greater than the maximum acceleration values ​​based on the three performance levels (IO, LS and CP). Therefore, performance-based design, while being more economical than the LRFD method, also leads to a reduction in floor acceleration. Also, the performance analysis of frames designed using the LRFD method under explosive loading showed that these frames provide the IO performance level.

Keywords

References

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Passive Defense
Volume 16, Issue 4 - Serial Number 64
Serial number 64. Winter 2026
February 2026
Pages 91-104

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History

  • Receive Date: 03 June 2025
  • Revise Date: 06 August 2025
  • Accept Date: 20 September 2025
  • Publish Date: 19 February 2026

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