本文選題：橋梁工程　切入點(diǎn)：連續(xù)梁橋　出處：《振動(dòng)與沖擊》2017年16期

【摘要】：以某三跨混凝土連續(xù)梁橋?yàn)槔?建立了該橋的空間有限元分析模型,在3條人工地震波作用下,采用非線性時(shí)程分析方法計(jì)算了應(yīng)用摩擦擺支座(FPS)隔震前、后結(jié)構(gòu)的縱向地震能量反應(yīng),對(duì)比了3種隔震體系的耗能效果,并研究了FPS等效滑動(dòng)半徑和摩擦因數(shù)對(duì)能量反應(yīng)及分配的影響。分析研究結(jié)果表明,采用FPS隔震后結(jié)構(gòu)體系絕大部分地震能量由支座耗散,可有效降低結(jié)構(gòu)的能量耗散需求,保護(hù)結(jié)構(gòu)安全,其中全橋隔震方案效果最好。增大等效滑動(dòng)半徑和摩擦因數(shù)均有利于提高FPS支座耗能減震效果,結(jié)構(gòu)能量耗散需求隨之減小,但當(dāng)?shù)刃Щ瑒?dòng)半徑和摩擦因數(shù)較大時(shí),繼續(xù)增大設(shè)計(jì)參數(shù)對(duì)耗能減震效果的改善作用趨于不變。
[Abstract]:Taking a three-span concrete continuous beam bridge as an example, the spatial finite element analysis model of the bridge is established. Under the action of three artificial seismic waves, the nonlinear time-history analysis method is used to calculate the seismic isolation before the application of friction pendulum support. The longitudinal seismic energy response of the post structure is compared with the energy dissipation effects of three isolation systems. The effects of FPS equivalent sliding radius and friction coefficient on the energy response and distribution are studied. Most of the seismic energy of the structure system is dissipated by bearing after FPS isolation, which can effectively reduce the energy dissipation requirement of the structure and protect the safety of the structure. The result of the whole bridge isolation scheme is the best. Increasing the equivalent sliding radius and friction coefficient can improve the energy dissipation effect of the FPS bearing, and the energy dissipation demand of the structure will decrease, but when the equivalent sliding radius and friction coefficient are large, The effect of increasing design parameters on the improvement of energy dissipation effect tends to be constant.
【作者單位】： 山東省交通規(guī)劃設(shè)計(jì)院;北京交通大學(xué)土木建筑工程學(xué)院;
【分類號(hào)】：U442.55

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