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Performance-Based Seismic Design In Real Life: The Good, The Bad And The Ugly Dimitrios Vamvatsikosa a School of Civil Engineering, National Technical University, Athens, Greece Keywords: Performance, seismic design, hazard, risk, behavior factor TRAILER Designing a structure to deliver the desired performance under the uncertainties of hazard, materials and questionable models, is largely the Holy Grail of earthquake engineering. A number of methods have appeared in the literature claiming to offer this coveted prize, yet, in my very own opinion, they may require heavy computations or strict assumptions, sometimes offering a useful but partial solution, perhaps delivering something other than what the user expected, or even failing to deliver altogether. This does not necessarily detract from the usefulness of each method, but it does certainly mean that some differentiation among approaches should be maintained, despite all of them being bundled underneath the moniker of “performance-based”. Therefore, due to my heavy exposure to spaggeti westerns from a very young and tender age, my eternal fascination with the work of Sergio Leone and Ennio Morricone, and my desire to pay tribute to the shining geniuses that defined my childhood cosplay days, let me introduce to you what I consider to be il buono, il brutto e il cattivo of performance-based seismic design approaches. And like any good film, I am afraid you will have to read this paper to its conclusion to figure out which is which. I hope you enjoy it. منبع دانلود از پیوست vamva_prANIDIS2017_GoodBadUgy.pdf

A Seismic Microzonation Study with Geotechnical Aspects on the New Construction Sites in Ardabil, Iran Original Article, D65 Arjmand Noshahr A., Nouri G., Negahdar R., Sadeghi R. J. Civil Eng. Urban. 4(4): 430-434. 2014 ABSTRACT: Due to development of constructions in Ardabil city in northwest of Iran and placement of it on the alluvium, seismic and geotechnical hazards assessment on the construction sites are needed. It specifies areas with a high seismic and geotechnical hazards that will ultimately lead to the development of urbanity codes. Hence, the most significant faults in the vicinity of city within circle with radius of 150 km collected. Through the deterministic risk analysis, the design acceleration is obtained. In this paper, according to the geotechnical boreholes and tests to a depth of 40 meters in different parts of the city, beside deterministic risk analysis, ground response analyses using appropriate acceleration time histories based on Iranian seismic code 2800 for the construction sites of the city are performed. Using the data from geotechnical measurements, soil types in the different areas are designated. The soil types in the most parts of studied area are classified as type III of the standard 2800 classification. Comparison of the obtained acceleration with the proposed peak ground acceleration of 0.3g of standard 2800, showed that almost 40% of the grid elements exhibit PGA values of 0.3 g to 0.4 g and 25% exhibit PGA values of more than 0.4 g. The dense granular alluviums and some with high stiffness experience the lowest PGA of about less than 0.3g. Key words: Hazard, Design Earthquake, Site Response, Microzonation منبع: [Hidden Content] دانلود: [Hidden Content].,%204%20(4)%20430-434,%202014.pdf J. Civil Eng. Urban., 4 (4) 430-434, 2014.pdf