【摘要】：橋梁結(jié)構(gòu)的抗震設(shè)計(jì)可以分為延性設(shè)計(jì)與減隔震設(shè)計(jì)。減隔震設(shè)計(jì)是使用一定的措施或者增加附加裝置使橋梁結(jié)構(gòu)與地震動(dòng)分離開來,或者是吸收消耗地震動(dòng)傳給結(jié)構(gòu)的能量,即隔震與減震消能技術(shù),以保證結(jié)構(gòu)的安全。本文基于"支座功能分離"的設(shè)計(jì)思路,介紹一種新型鋼阻尼支座,它由減震榫通過串聯(lián)的方式與球形鋼支座組合成整體。文章采用理論計(jì)算與試驗(yàn)相結(jié)合的方式對(duì)鋼阻尼支座的減震性能進(jìn)行研究。主要研究?jī)?nèi)容如下:1、對(duì)鋼阻尼支座的擬靜力試驗(yàn)結(jié)果進(jìn)行分析,主要包括其滯回曲線、骨架曲線、初始彈性剛度、剛度退化、承載力退化以及等效粘滯阻尼系數(shù)等指標(biāo);2、采用有限元程序建立鋼阻尼支座模型,計(jì)算其滯回曲線、骨架曲線等,并與試驗(yàn)結(jié)果進(jìn)行了對(duì)比,試驗(yàn)結(jié)果與有限元模擬結(jié)果基本吻合;3、建立鐵路某簡(jiǎn)支梁橋模型,研究了鋼阻尼支座簡(jiǎn)支梁橋的橋墩在地震作用下的動(dòng)力響應(yīng),并對(duì)其減震效果作出分析評(píng)價(jià);4、分析了鋼阻尼支座簡(jiǎn)支梁橋與普通支座簡(jiǎn)支梁橋采用《鐵路工程抗震規(guī)范》(GB50111-2006)計(jì)算時(shí)的區(qū)別,給出了鋼阻尼支座簡(jiǎn)支梁橋地震響應(yīng)的簡(jiǎn)化計(jì)算方法,并將簡(jiǎn)化計(jì)算結(jié)果與時(shí)程計(jì)算結(jié)果相比對(duì),誤差較小,說明鋼阻尼支座簡(jiǎn)支梁橋的簡(jiǎn)化計(jì)算方法計(jì)算地震響應(yīng)時(shí)可以在一定程度上代替復(fù)雜而且又耗時(shí)的時(shí)程計(jì)算。5、研究橋墩高度對(duì)鋼阻尼支座簡(jiǎn)支梁橋地震響應(yīng)的影響,利用簡(jiǎn)化計(jì)算方法與時(shí)程計(jì)算方法分別計(jì)算了墩高為5m、8m、10m、15m、20m時(shí),鋼阻尼支座簡(jiǎn)支梁橋的減震率。
[Abstract]:The seismic design of the bridge structure can be divided into ductility design and seismic isolation design. The seismic isolation design is to use certain measures or add additional devices to separate the bridge structure from the ground motion, or to absorb the energy that is transmitted to the structure by the consumption of ground vibration, that is, isolation and damping energy dissipation technology to ensure the safety of the structure. A new type of steel damping support is introduced. It is composed of a spherical steel bearing with a damping tenon in series. The damping property of the steel damping bearing is studied in the combination of theoretical calculation and test. The main contents are as follows: 1, the pseudo static test knot of the steel damping bearing is made as follows. The analysis mainly includes the hysteresis curve, the skeleton curve, the initial elastic stiffness, the stiffness degradation, the bearing capacity degradation and the equivalent viscous damping coefficient. 2, the steel damping support model is established by the finite element program, the hysteresis curve and the skeleton curve are calculated, and the test results are compared with the experimental results. The test results and the finite element simulation are compared. The results are basically consistent. 3, the model of a simple supported beam bridge is established and the dynamic response of the piers of the steel damped support simple supported beam bridge under the earthquake action is studied, and the damping effect is analyzed and evaluated. 4, the analysis of the simple supported beam bridge of the steel damping bearing and the simple supported beam bridge for the calculation of the seismic code for the Railway Engineering (GB50111-2006) is analyzed. The simplified calculation method of seismic response of the simple supported beam bridge with steel damping bearing is given, and the simplified calculation results are compared with the time history calculation results, and the error is smaller. It shows that the simplified calculation method of the simple supported beam bridge of the steel damping bearing can replace the complicated and time-consuming time history calculation.5 for the calculation of the seismic response to a certain extent. The effect of pier height on seismic response of steel damped support simple supported beam bridge is calculated by using simplified calculation method and time history calculation method to calculate the damping ratio of the simple supported beam bridge with the height of 5m, 8m, 10m, 15m and 20m respectively.
【學(xué)位授予單位】：北京交通大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：U442.55;U448.217

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