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Research on Dynamics Characteristics of Deck Pavement of Concrete-Filled Steel Tube Arch Bridge
Zhuang Yue-ming
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Abstract
First of all,finite element 3D model of the concrete-filled steel tube arch bridge above Qian-dao Lake is established.By calculation of finite element method,the initial eight stages auto-oscillation frequency and mode of the concrete-filled steel tube arch bridge are acquired.Meanwhile,horizontal and vertical auto-oscillation fundamental frequency of the concrete-filled steel tube arch bridge is calculated.Secondly,moving constant load is used to research the dynamics characteristics of deck pavement of the concrete-filled steel tube arch bridge.Resonance velocity of the concrete-filled steel tube arch bridge above Qiandao Lake is computed to analyze the probability of bridge resonance.The maximum vertical displacement and longitudinal tensile stress of mid-span node under different vehicle speeds are calculated.Furthermore,impact coefficient reference value of the concrete-filled steel tube arch bridge is put forward.Finally,considering construction loads,the maximum tensile stress and shearing stress of beam bottom are calculated to analyze the influence of construction exploiting Dynapac CC522 vibratory roller.