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DISPLACEMENT-BASED SEISMIC PERFORMANCE EVALUATION OF DHAJJI STRUCTURAL SYSTEMS Naveed Ahmad1, Qaisar Ali2, Helen Crowley3 and Rui Pinho4 Abstract The paper presents the derivation of mechanical models, using experimental and numerical investigations, for the development of displacement-based seismic performance evaluation of Dhajji wall, timber-braced frame with masonry infill, structural systems. The mechanical model uses secant vibration period, limit state displacement capacity, viscous damping and overdamped displacement spectrum to assess the global seismic performance of structures. Three full scale Dhajji walls typical of current construction practice in Pakistan are tested quasi-static-cyclically to obtain drift limits, hysteretic response, viscous damping and strength envelope of Dhajji walls which are analyzed to develop a simplified method for the nonlinear dynamic time history analysis of Dhajji structures using equivalent frame approach. Thirty-six case study 2D structural models, representing regional building stock, are analyzed using natural accelerograms in order to develop limit state vibration period and displacement capacity formulae. Controlled Monte Carlo simulation is used to generate random populations of regional building stock, taking into account the uncertainties in the geometrical and mechanical properties of the systems, to develop analytical fragility functions for Dhajji buildings, which, along with the fragility functions for other building typologies, can be used for seismic risk map development, regional code development, modeling insurance schemes, earthquake preparedness and planning and decision making in the region. Case study application is performed to derive damage probability matrices for scenario earthquakes in the region in order to estimate the number of Dhajji buildings required to be retrofitted. Keywords: Displacement-Based; Nonlinear Static; Seismic Risk Assessment; Dhajji; Pakistan. به نقل از کانال تلگرام جداسازی لرزه ای و میراگرهای انرژی دانلود از پیوست DISPLACEMENT_BASED_SEISMIC_PERFORMANCE.pdf