半漂浮體系斜拉橋動(dòng)力特性及減震研究
打開文本圖片集
【摘 要】：為研究半漂浮體系斜拉橋的動(dòng)力特性，對(duì)成橋狀態(tài)半漂浮體系斜拉橋進(jìn)行地震響應(yīng)分析，研究表明：半漂浮體系斜拉橋基本模態(tài)為縱漂，在地震作用下梁端和塔頂均會(huì)產(chǎn)生較大縱橋向位移，采用金屬阻尼器可顯著降低其塔頂和梁端順橋向位移響應(yīng)。
【關(guān)鍵詞】：半漂浮體系；斜拉橋；動(dòng)力特性；減震
【中圖分類號(hào)】：U448.27 【文獻(xiàn)標(biāo)志碼】：A 【文章編號(hào)】：1008-3197（2024）02-33-03
【DOI編碼】：10.3969/j.issn.1008-3197.2024.02.009
Research on Dynamic Characteristics and Seismic Energy Dissipation of
Semi-floating Cable-Stayed Bridges
YANG Honglei
（Tianjin Metro Group Co. Ltd.，Tianjin 300011，China）
【Abstract】：In order to study dynamic characteristics of a semi floating cable-stayed bridge， the paper studies itsseismic response. The study showed that the basic mode of the semi floating cable-stayed bridge is longitudinal floating， and under seismic action， there will be significant longitudinal displacement at the beam end and tower top. The use of metal dampers can significantly reduce the displacement response of the tower top and beam end along the bridge direction.
【Key words】：semi-floatingsystem;cable-stayed bridge; dynamic characteristics; seismic reduction
斜拉橋具有造型美觀、跨度大、受力傳遞路徑明確、便于懸臂施工等諸多優(yōu)點(diǎn)[1～3];根據(jù)塔墩梁連接方式的不同，可劃分為全漂浮體系斜拉橋、塔梁固結(jié)塔墩分離體系斜拉橋、塔墩梁固結(jié)體系斜拉橋及半漂浮體系斜拉橋[4]。（剩余2487字）