In this paper, moment-curvature behavior and ductility of prestressed concrete members based on nonlinear analysis is investigated. Influence of various design parameters on ductility of flexural members is determined according to appropriate materials models for stress-strain curves of concrete, prestressing steel and conventional reinforcements. Parameters studied include reinforcing index (ω...

With growth the construction technologies, Cold-Formed Steel, CFS, sections are widely used in ordinary steel buildings because of some advantages such as light weight, ease of installation, decrease in cost, and increase in speed of operation. Using the bolted connections for CFS joist is one of the best details for steel structures. The main objective of this study is to conduct an experiment...

Many buildings had stopped their service due to damage non-structural members including ceilings, partition walls and piping after large-scale earthquakes. In particular, piping-failure-caused water leakage damaged electronic equipment resulted in a loss of functionality the building. Cyclic bending tests are conducted carbon steel pipes for supply with nominal diameters 25A, 40A, 50A 80A evalu...

This paper presents an improvement of the Visual Pattern image coding (VPIC) scheme presented by Chen and Bovik in [2] and [3]. The patterns in this improved scheme are defined by morphological operations and classified by absolute error minimization. The improved scheme identifies more uniform blocks and reduces the noise effect. Therefore, it improves the compression ratio and image quality i...

PURPOSE We aimed to follow diary-registered symptoms from eyes and airways in mild steel welders and relate them to different exposure measures. Furthermore, we would clarify the influence of possible effect modifiers. METHODS Non-smoking welders with (N = 74) and without (N = 32) work-related symptoms the last month were enroled. Symptoms and work tasks each day for three two-week periods du...

Noncohesive granular media exhibit complex responses to sudden impact that often differ from those of ordinary solids and liquids. We investigate how this response is mediated by the presence of interstitial gas between the grains. Using high-speed x-ray radiography we track the motion of a steel sphere through the interior of a bed of fine, loose granular material. We find a crossover from nea...

A.B. Naizabekov, S.N. Lezhnev, Rudny Industrial Institute, Rudny, Kazakhstan; H. Dyja, T. Bajor, Czestochowa University of Technology, Czestochowa, Poland; K. Tsay, Institute of Nuclear Physics of the National Nuclear Center of the Republic of Kazakhstan, Almaty, Kazakhstan; A. Arbuz, N.Gusseynov, R. Nemkaeva Al-Farabi Kazakh National University, Almaty, Kazakhstan The cross rolling is the one ...