The influence of composite girders on the modified buckling factor for columns was investigated in both braced and unbraced frames. girders' end conditions were represented as rigid hinged . Furthermore, based proposed stiffness parameter, derived formulation follows same assumptions standard effective length (K-factor). Moreover, suggested equations frames obtained using slope-deflection metho...

We consider the emittance preservation issues in two possible linear collider main linac configurations: The Next Linear Collider (NLC), using 11.424 GHz copper accelerating structures at a loaded gradient of 52 MeV/meter, and USColdLC, using 1.3 GHz superconducting structures at a loaded gradient of 28 MeV/meter. Emittance dilution sources considered include misalignments of individual element...

abstract: there is always a need to increase a distillate output of solar still. if plates will be used inside solar still then distillate output of solar still are expected to increase. hence, an experimental study is conducted to improve distillate output of basin solar stills by increasing the effective surface area with the help of different plates. for the purpose of experiment, three sola...

Vertical vibration of linac components (accelerating structures, girders and quadrupoles) in the NLC has been studied experimentally and analytically. Effects such as structural resonances and vibration caused by cooling water both in accelerating structures and quadrupoles have been considered. Experimental data has been compared with analytical predictions and simulations using ANSYS. A desig...

The segmental prestressed concrete box girder of Koror-Babeldaob (KB) Bridge in Palau, which had the record span of 241 m (791 ft.), presents a striking paradigm of serviceability loss due to excessive multi-decade deflections. The data required for analysis have recently been released and are here exploited to show how the analysis and design could be improved. Erected segmentally in 1977, thi...

Abstract This paper briefly describes the methodology, performance and obtained results of unique experiments performed on original I-73 precast bridge girders. The main objective was to determine actual anchorage length corroded-through fully grouted prestressing reinforcement (prestressing wires), which is important for determination residual load-bearing capacity prestressed structures. Obse...

Abstract A methodology for performance assessment of prestressed concrete (PSC) girder bridge system, based on strain monitoring in limited number girders, is proposed this paper. The uses Polya urn model determining probabilities the system being different condition states with respect to loss prestress. Performability measure used describing system. state assigned from a predefined set states...