000010847 001__ 10847
000010847 005__ 20141205155809.0
000010847 04107 $$aeng
000010847 046__ $$k2008-10-12
000010847 100__ $$aMahmood, Hosseini
000010847 24500 $$aSeismic Vulnerability Assessment of Process Piping Supported on Pipe-Way in Industrial Plants

000010847 24630 $$n14.$$pProceedings of the 14th World Conference on Earthquake Engineering
000010847 260__ $$b
000010847 506__ $$arestricted
000010847 520__ $$2eng$$aMany different codes, standards and guidelines are available for the structural and seismic design and assessment of industrial facilities. However, most of these codes refer the seismic considerations to building codes, which are not directly usable for industrial facilities, and should be interpreted to be used for these purposes. As it is evident, above ground process piping, supported on pipe-ways, which usually used for transmission of liquid and gas type materials in industrial facilities such petrochemical and power plants, have essential role in the functionality of such facilities. This study discusses the seismic vulnerability of the above ground process piping that commonly is used in such industrial facilities. There are three basic methods for analyzing seismic response of piping systems and related supporting structures: 1) static loading analysis, 2) response spectrum analysis and 3) time history analysis (THA). However, because of complexity of analyzing piping system and supporting structures together, separate analysis of these two systems are still widely used. As a result, the seismic loading on piping systems or support structures will be over-estimated or underestimated, which would result in the increased stiffness or flexibility of system. This in turn can affect either the economy or the seismic safety of the designed system. To investigate the vulnerability of piping and its supporting structure as a compound system with acceptable precision the THA method has been used in this study. The considered accelerograms for THA include five different recorded earthquakes scaled to four various PGA levels. The spacing between the frames of 3-dimensional supporting structure has been supposed as 4, 6, and 8 meters to evaluate the effect of support spacing on the main responses of compound structure. Two sets of diameters and thicknesses have been considered for the piping system, made of typical construction steel St. 37, according to standard DIN 2458. The finite element method has been used to determine responses of systems in various cases, in which the pipes have been modeled by shell elements. The responses of straight segmented pipes with constant length and varying support spacing, have been calculated simultaneously under gravity loads of pipes and insulation, internal operation pressure and temperature loads, as well as seismic forces. By using the numerical results the effects of supporting structure on the response of complex system (pipes plus supporting structure) have been discussed in comparison with the piping system alone (without supporting structure).

000010847 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000010847 653__ $$aIndustrial Facilities, Process Piping, Pipe way, Segmented pipes 

000010847 7112_ $$a14th World Conference on Earthquake Engineering$$cBejing (CN)$$d2008-10-12 / 2008-10-17$$gWCEE15
000010847 720__ $$aMahmood, Hosseini$$iOmid, Azizpour
000010847 8560_ $$ffischerc@itam.cas.cz
000010847 8564_ $$s24388$$uhttps://invenio.itam.cas.cz/record/10847/files/06-0131.pdf$$yOriginal version of the author's contribution as presented on CD, Paper ID: 06-0131.
000010847 962__ $$r9324
000010847 980__ $$aPAPER