Simplified engineering method of suspension two-span pedestrian steel bridges with flexible and rigid cables under action of asymmetrical loads/ Asimetriskai apkrauto kabamojo vienajuoscio dvieju tarpatramiu plieninio pesciuju tilto su lanksciaisiais ir standziaisiais lynais inzinerine skaiciavimo metodika/Vienkarsota aprekinu metode nesimetriskai slodzei paklautam divlaidumu lentveida sistemas gajeju terauda tiltam ar stingu un
The article deals with two spans steel split-type one band pedestrian suspension bridge structure. Structural behaviour of such suspension member subjected to asymmetrical load has been discussed under the condition of temporary load influence imposed on one span out of two. Two structural solutions...
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Veröffentlicht in: | The Baltic journal of road and bridge engineering 2011-12, Vol.6 (4), p.267 |
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Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | The article deals with two spans steel split-type one band pedestrian suspension bridge structure. Structural behaviour of such suspension member subjected to asymmetrical load has been discussed under the condition of temporary load influence imposed on one span out of two. Two structural solutions of one band suspension bridges have been considered: with completely flexible retaining elements, and in case of bending rigid. The article provides analytical expressions for calculations of the displacements of these asymmetrically loaded suspended elements, thrust forces and bending moments. Simplified analytical method accuracy of one band bridges is illustrated on the basis of performed numerical experiment Performed numerical experiment shows the resulting basis of simplified analytical method accuracy of one band bridges. Keywords: suspension steel bridges, pedestrian bridges, steel stress-ribbon, asymmetric loading, kinematic displacements, elastic displacements, bending stiffness, cables rigidity. Straipsnyje aptariama dvieju tarpatramiu karpytoji vienajuoscio plieninio pesciuju tiltu kabamoji konstrukcija. Nagrinejama tokios asimetriskai apkrautos konstrukcijos elgsena, kai laikinoji apkrova veikia tik viena is dvieju tarpatramiu. Aptariami du konstrukciniai vienajuosciu kabamuju tiltu atvejai: kai laikantieji elementai yra absoliuciai lankstus ir kai jie turi lenkiamaji standi. Pateikiamos analizines israiskos tokiu asimetriskai apkrautu kabamuju elementu poslinkiams, sketimo jegoms ir lenkiamiesiems momentams apskaiciuoti. Remiantis atliktu skaitiniu eksperimentu parodytas gautos vienajuosciu tiltu inzinerines skaiciavimo metodikos tikslumas. Reiksminiai zodziai: kabamieji plieno tiltai, pesciuju tiltai, vienajuosciai tiltai, asimetrinis apkrovimas, kinematiniai poslinkiai, tamprieji poslinkiai, lenkiamasis standis, kabamieji standus lynai. Raksts veltits divlaidumu terauda lentveida tilta konstrukcijas izpetei. Tiek petitas lentveida tilta elementu, kas paklauti nesimetriskai slodzei, konstruktivas ipasibas, balstoties uz islaicigo slodzu ietekmi uz vienu un uz diviem laidumiem. Tiek apskatiti divi konstruktivie risinajumi tiltam ar vienu nesoso platni: ar pilnigi lokanu nesoso elementu un nesoso elementu, kas ir pietiekosi stings, lai uznemtu momentu piepules. Raksta ir dotas analitiskas izteiksmes parvietojumu, ass spekam un lieces momentu aprekinam siem nesimetriski slogotajiem lentveida elementiem. Vienkarsotas analitiskas metodes precizitate t |
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ISSN: | 1822-427X |
DOI: | 10.3846/bjrbe.2011.34 |