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Pushover analysis of a three-story one-span space frame under oblique seismic action was conducted using ABAQUS software. The loading angle is 0 degrees, 15 degrees, 30 degrees and 45 degrees respectively. Failure mechanism of the space frame was analyzed, such as yield sequence of beam end and column end, and force-displacement curves. The results indicate that the structure loaded with angle of 0 degrees failed when beam hinge appeared. With the increasing of load angle, the failure mechanism of frame changed from beam hinge failure to column hinge failure gradually.
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