本文關(guān)鍵詞： 橋梁邊墩 橫向減震體系 滯回型鋼阻尼器 地震易損性分析 損傷指標(biāo)　出處：《同濟(jì)大學(xué)學(xué)報(bào)(自然科學(xué)版)》2016年03期 　論文類(lèi)型：期刊論文

【摘要】：在大跨度橋梁中,邊墩的豎向恒載與中墩相比往往較小,導(dǎo)致支座滑動(dòng)摩擦力較小,因此,摩擦型耗能減震支座無(wú)法有效控制地震位移.針對(duì)以上問(wèn)題,提出了滯回型鋼阻尼器和滑動(dòng)支座配合使用的橋梁邊墩減震體系.然后,以一座大跨度鋼桁架拱橋?yàn)槔?建立了全橋有限元模型,以支座位移、墩底彎矩以及拱腳立柱的應(yīng)力為工程需求參數(shù),采用云圖法建立概率地震需求模型,分析了該大跨度橋梁的邊墩橫向地震易損性.結(jié)果表明,采用滯回型鋼阻尼器和滑動(dòng)支座的橋梁邊墩減震體系可有效降低橋梁上、下部結(jié)構(gòu)各主要控制部位的橫向地震易損性.
[Abstract]:In the long-span bridge, the vertical dead load of the side pier is usually smaller than that of the middle pier, which leads to the small sliding friction force of the bearing. Therefore, the friction type energy dissipation support can not effectively control the earthquake displacement. The vibration absorption system of side pier of bridge with hysteretic steel damper and sliding support is put forward. Then, taking a large span steel truss arch bridge as an example, the finite element model of the whole bridge is established, and the displacement of the bridge is taken as the base. The bending moment at the bottom of the pier and the stress of the column with arch foot are the engineering demand parameters. The probabilistic seismic demand model is established by using the cloud diagram method, and the lateral seismic vulnerability of the side pier of the long-span bridge is analyzed. Using hysteretic steel dampers and sliding supports can effectively reduce the lateral seismic vulnerability of the bridge and the main control parts of the substructure.
【作者單位】： 同濟(jì)大學(xué)土木工程防災(zāi)國(guó)家重點(diǎn)實(shí)驗(yàn)室;
【基金】：國(guó)家“九七三”重點(diǎn)基礎(chǔ)研究發(fā)展規(guī)劃(2013CB036302) 國(guó)家自然科學(xué)基金(51278375)
【分類(lèi)號(hào)】：U442.55
【正文快照】： hysteretic damper;fragility analysis;damage indices對(duì)于大跨度橋梁的邊墩,目前工程界常用的橫向抗震體系主要有兩類(lèi):(1)采用固定支座的全限位體系,限制墩、梁橫向相對(duì)位移,雖然可以保障正常使用中邊墩的橫向穩(wěn)定性,但在潛在地震下,支座和下部結(jié)構(gòu)都將承受巨大的水平力,可

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