In this article optimal design of shear walls is performed under seismic loading. For practical aims, a database of special shear walls is created. Special shear walls are used for seismic design optimization employing the charged system search algorithm as an optimizer. Constraints consist of design and performance limitations. Nonlinear behavior of the shear wall is taken into account and per...

Seismic isolation is a method to reduce the destructive effects of earthquakes on a structure in which the structure is separated from its foundation by devices called seismic isolators. As a result, the horizontal movements of the earthquake transmitted to the structure are reduced. The seismic isolation is used for both newly constructed structures as well as for retrofitting the existing bui...

(c) 2015, SEG. This is an author produced version of the paper 'Beckwith, JA and Clark, R (2015) Estimating frequency-dependent attenuation quality factors in pre-stack surface seismic data. In: Schneider, RV, (ed.) SEG Technical Program Expanded Abstracts 2015. 2015 Society of Exploration Geophysicists Annual Meeting, 18-23 Oct 2015, New Orleans, USA. Society of Exploration Geophysicists , pp....

Using Global Positioning System (GPS) data from permanent sites and U.S. Geological Survey (USGS) campaign data we have estimated co-seismic displacements and secular background crustal deformation patterns associated with the 21 February 2008 Wells Nevada earthquake. Estimated displacements at nearby permanent GPS sites ELKO (84 km distant) and GOSH (81 km distant) are 1.0±0.2 mm and 1.1±0.3 m...

bandar abbas (center of hormozgan province) is the most important port city in the south of iran because of its historical places, cultural, economic, social and political importance. high risk of earthquake occurrence in this city and its province indicates the necessity of surveying the seismic vulnerability of buildings. the object of this paper is collected from existing buildings, compiled...

Many streams and springs, which were dry or nearly dry before the 2014 Mw6.0 South Napa earthquake, started to flow after the earthquake. A United States Geological Survey stream gauge also registered a coseismic increase in discharge. Public interest was heightened by a state of extreme drought in California. Since the new flows were not contaminated by pre-existing surface water, their compos...

The Kutch Earthquake of January 26, 2001 in Gujarat, India, caused the destruction of a large number of modern 4 to 10-storied buildings. After this earthquake, doubts arose about our professional practices, building by-laws, construction materials, building codes and education for civil engineers and architects. It led to large number of short-term courses and workshops, revision of the seismi...

 Many existing bridges were designed without adequate consideration of seismic risk. The full or partial collapse of even one major bridge in a city or community would have destroying results. There has been focuses on developing fragility-based seismic vulnerability of existing usual bridges in Iran or support decision making on seismic upgrade. This article focuses on developing performance b...

the  main purpose of the present study­ is to compile pre- marriage  counseling content according to ethical and spiritual factors and skills predicting a successful marriage. the statistical population included all the couples  who referred to tabriz health centers in the year 2010, from among whom 40 couples were chosen by using systematic sampling. semi-structured interview was used to colle...