Abstract
The aim of this study is to investigate the effect of wind loads on the seismic collapse performance and seismic loss for steel ordinary moment frames (OMFs). For this purpose, 9-, 12-, 15-, and 18-story steel OMFs are repeatedly designed for (1) gravity load + seismic load, (2) gravity load + seismic load + wind load (wind speed = 44 m/s), and (3) gravity load + seismic load + wind load (wind speed = 55 m/s). The seismic collapse performance and seismic loss of OMFs are evaluated using the procedures in FEMA P695 (FEMA, 2009) and FEMA P58 (FEMA, 2018), respectively. Steel OMFs designed with consideration of wind loads have larger member sections than corresponding steel OMFs designed without consideration of wind loads as expected. Although member sections are increased when wind loads are considered, the growth in the maximum base shear force and lateral stiffness of OMFs are insignificant. Unlike our expectation, OMFs designed with consideration of wind loads have higher expected annual loss (EAL) than corresponding OMFs designed without consideration of wind loads.
Highlights
Steel moment frames have been widely used to resist lateral forces induced by wind and seismic loads
Three types of steel moment frames are specified in ASCE 7-16 [1]: (1) ordinary moment frame (OMF), (2) intermediate moment frame (IMF), and (3) special moment frame (SMF)
The most stringent design and detail requirements are required on SMFs among the three types of moment frames, whereas the least requirements are specified for OMFs [5,6]
Summary
Steel moment frames have been widely used to resist lateral forces induced by wind and seismic loads. Important to evaluate the seismic performance of OMFs designed according to current Steel OMFs are permitted only for seismic design categories (SDC) A, B, and C [1]. Seismic design codes, which was the motivation of this study In such SDCs, wind loads govern design results for OMFs rather than seismic loads, Steel OMFs are permitted only for seismic design categories (SDC) A, B, and C [1]. Most studies on steel moment frames such SDCs, wind loads govern design results for OMFs rather than seismic loads, partichave focused on steel. According to current seismic design codes, which was mic performance of OMFs designed the motivation of this study. The aim of this study the seismic performance of steel OMFs withOMFs consideration of wind load effects.
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