Past earthquakes have demonstrated that old RC bridges may be seismically vulnerable. Bridge responses during the last decades illustrated the necessity of the seismic assessment of bridges especially those which were designed with old codes. In this research an existing concrete bridge representative of the most common bridges in the highway system in Iran are studied. Push over and nonlinear ...

This paper examines differences in performances of a range of torsionally stiff and flexible single story buildings designed with the provisions of Iranian Standard 2800. Seismic nonlinear dynamic time history behavior of eight building models subjected to seven horizontal bi-directional design spectra compatible ground motions are investigated. These models cover a wide range of very torsional...

Memory and time requirements of seismic calculations demand parallel implementations. One of the most widespread languages applied to this area is Fortran. It includes optimized functionality for scienti c computing. Unfortunately in Fortran, parallel program code is often error prone and lacks maintainability, reusabililty, and portability if Message Passing approaches are used. On the other h...

Current rising energy demand/supply ratio trends are forecast to continue into the foreseeable future. As a consequence, effective and efficient seismic surveying and processing techniques are required now more than ever. Unfortunately those outside of organizations with the resources to develop their own processing and/or visualization packages, or license proprietary third-party ones, must ma...

This work evaluates the performance of a number of seismic assessment procedures when applied to a case study reinforced concrete (RC) wall building. The performance of each procedure is evaluated through its ability to accurately predict deformation demands, specifically, roof displacement, inter-storey drift ratio and wall curvatures are considered as the key engineering demand parameters. Th...

Non-linear dynamic time history analysis is considered as the most advanced and comprehensive analytical method for evaluating the seismic response and performance of multi-degree-of-freedom building structures under the influence of earthquake ground motions. However, effective and accurate application of the method requires the implementation of advanced hysteretic constitutive models of the ...

Characterization and evaluation of a biological submerged filter was carried out on a full-scale pilot plant performing removal of biochemical oxygen demand (BOD) and total nitrogen (TN) from pre-treated urban wastewater. The average influent values of BOD5, chemical oxygen demand (COD) and TN were 370, 1,015 and 60 mg/L, respectively. The pilot plant produced good discharge quality during stea...

Within Geophysics, seismic methods are an essential tool for petroleum and gas exploration. They produce images of the earth's interior and let explorationists analyze the geological structure of the underground. The memory and time requirements of seismic calculations suggest parallel implementations. In Fortran, however, parallel program code often not only lacks maintainability and reusabili...

An accurate evaluation of the structural performance of reinforced concrete structural systems under seismic loading requires a probabilistic approach due to uncertainties in structural properties and the ground motion (referred to as basic uncertainties). The objective of this study is to identify and rank significant sources of basic uncertainties and structural components with respect to the...

This study aims to evaluate five different methodologies reported in the literature for developing fragility curves assess seismic performance of RC structures subjected structural pounding. In this context, displacement-based and curvature-based are developed. The use probabilistic demand models (PSDMs) on assessment pounding risk is further estimated. Linear bilinear PSDMs developed, while va...