Evaluation of the seismic performance of special moment frames using incremental nonlinear dynamic analysis

Majid Khorami , Masoud Khorami , Hedayatollah Motahar , Mohammadfarid Alvansazyazdi , Mahdi Shariati , Abdolrahim Jalali , M.M. Tahir

Abstract

In this paper, the incremental nonlinear dynamic analysis is used to evaluate the seismic performance of steel moment frame structures. To this purpose, three special moment frame structure with 5, 10 and 15 stories are designed according to the Iran\'s national building code for steel structures and the provisions for design of earthquake resistant buildings (2800 code). Incremental Nonlinear Analysis (IDA) is performed for 15 different ground motions, and responses of the structures are evaluated. For the immediate occupancy and the collapse prevention performance levels, the probability that seismic demand exceeds the seismic capacity of the structures is computed based on FEMA350. Also, fragility curves are plotted for three high-code damage levels using HASUS provisions. Based on the obtained results, it is evident that increase in the height of the frame structures reduces the reliability level. In addition, it is concluded that for the design earthquake the probability of exceeding average collapse prevention level is considerably larger than high and full collapse prevention levels.9.

Key Words

incremental nonlinear dynamic analysis; reliability of structures; fragility curves; seismic demand and capacity; performance level; confidence level

Address

Majid Khorami — Facultad de Arquitectura y Urbanismo, Universidad Tecnológica Equinoccial, Calle Rumipamba s/n y Bourgeois, Quito, Ecuador /Facultad de Ingeniería Civil y Ambiental, Escuela Politécnica Nacional, Ladrón de Guevara E11-253L, Quito, Ecuador
Masoud Khorami, Hedayatollah Motahar — Civil Engineering Department, Islamic Azad University, Tehran, Iran
Mohammadfarid Alvansazyazdi — Facultad Ingeniería Ciencias Físicas y Matemática, Carrera Ingeniería Civil, Universidad Central del Ecuador, Quito, Ecuador /Facultad de Arquitectura, Universidad Laica Eloy Alfaro de Manabí, Ecuador
Mahdi Shariati — Faculty of Civil Engineering, University of Tabriz, Tabriz, Iran /UTM Construction Research Centre, Faculty of Civil Engineering, Universiti, Teknologi Malaysia (UTM), 81310 Johor Bahru, Johor, Malaysia
Abdolrahim Jalali — Faculty of Civil Engineering, University of Tabriz, Tabriz, Iran
M.M. Tahir — UTM Construction Research Centre, Faculty of Civil Engineering, Universiti, Teknologi Malaysia (UTM), 81310 Johor Bahru, Johor, Malaysia

PDF Viewer

Preview is limited to the first 3 pages. Sign in to access the full PDF.

← Back to Volume 63, No. 2