{"title":"Determining the Maximum Lateral Displacement Due to Sever Earthquakes without Using Nonlinear Analysis","authors":"Mussa Mahmoudi","country":null,"institution":"","volume":26,"journal":"International Journal of Civil and Environmental Engineering","pagesStart":134,"pagesEnd":140,"ISSN":"1307-6892","URL":"https:\/\/publications.waset.org\/pdf\/12094","abstract":"For Seismic design, it is important to estimate,\r\nmaximum lateral displacement (inelastic displacement) of the\r\nstructures due to sever earthquakes for several reasons. Seismic\r\ndesign provisions estimate the maximum roof and storey drifts\r\noccurring in major earthquakes by amplifying the drifts of the\r\nstructures obtained by elastic analysis subjected to seismic design\r\nload, with a coefficient named \u201cdisplacement amplification factor\"\r\nwhich is greater than one. Here, this coefficient depends on various\r\nparameters, such as ductility and overstrength factors. The present\r\nresearch aims to evaluate the value of the displacement amplification\r\nfactor in seismic design codes and then tries to propose a value to\r\nestimate the maximum lateral structural displacement from sever\r\nearthquakes, without using non-linear analysis. In seismic codes,\r\nsince the displacement amplification is related to \u201cforce reduction\r\nfactor\" hence; this aspect has been accepted in the current study.\r\nMeanwhile, two methodologies are applied to evaluate the value of\r\ndisplacement amplification factor and its relation with the force\r\nreduction factor. In the first methodology, which is applied for all\r\nstructures, the ratio of displacement amplification and force reduction\r\nfactors is determined directly. Whereas, in the second methodology\r\nthat is applicable just for R\/C moment resisting frame, the ratio is\r\nobtained by calculating both factors, separately. The acquired results\r\nof these methodologies are alike and estimate the ratio of two factors\r\nfrom 1 to 1.2. The results indicate that the ratio of the displacement\r\namplification factor and the force reduction factor differs to those\r\nproposed by seismic provisions such as NEHRP, IBC and Iranian\r\nseismic code (standard no. 2800).","references":null,"publisher":"World Academy of Science, Engineering and Technology","index":"Open Science Index 26, 2009"}