풍하중에 의한 현수교 2D 해석

Suspension bridge is the one of the long-span bridge type. Since 1973, after completion of 'Nam-Hae Bridge', Many suspension bridges has been built. Suspension bridge is easy to affect by wind load caused by own thin cross section. To reflect these problem, engineer must consider wind load in design stage. However, wind tunnel test needs lot of cost and time. Computer simulation needs lot of cost and time too as simulation gets more precise. In this paper, study simplified analysis of suspension bridge. Numerical model consists of two nonlinear spring and one suspension bridge cross section. Cross section has two degree of freedoms, vertical and rotation. Motion of cross section is determined by two coupled differential equations. In this study, analysis response with parameter changing wind speed, cross section type and cross section torsional resistance.