【摘要】 近几十年的地震灾害中,连续梁桥结构破坏较为严重。桥梁消能减震设计作为一种先进的抗震设计方法,在理论上可有效减轻连续梁桥在地震作用下的破坏,但目前尚缺乏足够的强震或试验验证。因此,为研究连续梁桥在纵向设置黏滞阻尼器后的结构地震响应和减震效果,以青岛海湾大桥50m跨引桥为工程背景,制作完成了3跨连续梁桥(1个固定墩、3个自由墩)的1/20缩尺比例模型,进行常规设计桥梁和在自由墩顶和桥面主梁之间增置阻尼器桥梁的振动台对比试验。通过输入青岛人工地震波,从7个方面详细阐述设置黏滞阻尼器后,连续梁桥在不同地震烈度下纵向减震效果,并且对试验结果进行理论分析,验证试验正确性,为工程实践及科学研究奠定基础。更多还原

【Abstract】 In recent decades,continuous-beam bridges suffered serious damages in earthquake disasters.The bridge energy-dissipation and earthquake-resistance technology is an advanced vibration reduction technology.It is proved in theory that this technology can effectively mitigate the damage during earthquakes.But tests or evidences in large earthquakes are still needed.Therefore in order to study the earthquake response and seismic-reduced effect of continuous-beam bridges with longitudinal viscous dampers,with the Qingdao Gulf Bridge as the background,a 1/ 20 scale model of three-span continuous-beam bridge(one fixed pier and three free piers) was designed and studied under shaking table test,in which three viscous dampers were installed between the tops of free piers and the girder in the longitudinal direction.Using the Qingdao artificial seismic waves as the input,seven aspects of seismic-reduction effect were elaborated regarding the continuous-beam bridge with longitudinal viscous dampers under the different seismic intensities,and the test results were analyzed theoretically.更多还原