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The results indicated that slope effect leads to up to 37% increase in the damage probability and illustrated that amplification factor had a range of 1.1 to 1.35, moreover, in comparison with slight states, the probability damage growth rate in moderate and extensive states are higher. | JSEE Vol. 19, No. 1, 2017 Fragility Curves for Vulnerability Assessment of Steel Moment-Resisting Frames Adjacent to Slopes Jafar Mohammadi 1, Gholam Reza Nouri 2*, Ali Ghanbari 3, and Amid Erfani 1 1. M.Sc. Graduate, Kharazmi University, Tehran, Iran 2. Assistant Professor, Kharazmi University, Tehran, Iran, *Corresponding Author; email: r.nouri@khu.ac.ir 3. Professor, Kharazmi University, Tehran, Iran Received: 01/03/2016 Accepted: 28/02/2017 ABSTRACT Keywords: Fragility curve; Topography; Vulnerability; Earthquake Observations from past earthquakes in addition to the results from analytical and numerical studies have shown that topographic irregularities significantly affect seismic site responses. Nonetheless, few studies have focused on the effect of topography amplification on the seismic vulnerability of buildings adjacent to slopes. In this study, using “match up damage index to damage thresholds” method introduced in HAZUS, fragility curves were developed for steel momentresisting frames (SMRF) built adjacent to slopes. A two-dimensional finite-element model of the soil was implemented in ABAQUS to develop the fragility curves. Six models of combination of soil-structure and topography were considered. Furthermore, three types of buildings at different distances from the crest of the slope were considered. The results indicated that slope effect leads to up to 37% increase in the damage probability and illustrated that amplification factor had a range of 1.1 to 1.35, moreover, in comparison with slight states, the probability damage growth rate in moderate and extensive states are higher. 1. Introduction According to HAZUS, the fragility curves of the buildings are obtained using the median values of interstory drift ratio of the building, defined in four damage states of low, medium, extensive and complete. Generally, the damage is estimated based on several parameters such as type of the building, height of the building, and level of seismic .
