Effect of Wind Loads on Collapse Performance and Seismic Loss for Steel Ordinary Moment Frames

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.

A multi‐hazard analysis framework for earthquake‐damaged tall buildings subject to thunderstorm downbursts

“…The current design guidance 16–18 evidences such limitations, as it disregards the occurrence of multiple hazard events, such as earthquakes and strong winds, within the design life of a structure. The risk of exceeding the limit states can be twice in regions with significant wind and seismic hazard events compared with the regions governed by a single hazard, while the seismic performance of buildings designed to primary withstand wind loads can be very poor even under low‐amplitude events 19–23 …”

“…The risk of exceeding the limit states can be twice in regions with significant wind and seismic hazard events compared with the regions governed by a single hazard, while the seismic performance of buildings designed to primary withstand wind loads can be very poor even under low-amplitude events. [19][20][21][22][23] To understand the impact of wind and earthquake vibrations on structural performance, recent researchers have utilised probability-based techniques for multi-hazard structural analysis. Martinez-Vazquez 24 and Martinez-Vazquez et al 25 stressed the necessity of consideration for the combined effect of earthquakes and strong winds, since this may drive the structures into their inelastic response obviously increasing ductility demands.…”