本文選題：裝配式預(yù)應(yīng)力混凝土箱梁 + 抗震計算�。� 參考：《長安大學(xué)》2015年碩士論文

【摘要】：裝配式預(yù)應(yīng)力混凝土箱梁是我國高速公路主要橋型,應(yīng)用廣泛。近年來地震頻發(fā),橋墩作為直接受到地震力作用影響的主要承重構(gòu)件,其抗震性能尤為重要,為此,本文針對高烈度區(qū)預(yù)應(yīng)力混凝土連續(xù)箱的橋墩抗震計算展開研究。本文以十堰至天水高速公路項目(甘肅段)為研究背景,對賈家山漾水河大橋第二聯(lián)(4×20m)和峽口大橋第十聯(lián)(3×30m)橋梁應(yīng)用Midas2010有限元分析軟件建立了整橋模型,并對高速公路橋梁采取的抗震構(gòu)造措施及橋墩抗震配筋進行了論述。為進行對比分析研究,計算工況包括“普通盆式支座橋梁”地震動力時程分析、“普通板式支座橋梁”地震動力時程分析和“HDR隔震支座橋梁”地震動力時程分析,借鑒國內(nèi)外抗震設(shè)防經(jīng)驗并參照現(xiàn)行規(guī)范進行了詳細(xì)的橋墩動力特性計算分析,在E2地震作用下橋墩進入塑性狀態(tài)后采用HDR隔震支座較普通盆式、板式橡膠支座,其塑性鉸區(qū)橫橋向剪力設(shè)計值及墩頂順橋向位移值均有明顯下降,并且僅在HDR隔震支座工況下橋墩才能滿足受力及位移要求。因此,高烈度區(qū)高速公路橋梁在橋墩鋼筋受到構(gòu)造要求及施工工藝限制時,宜采用隔震支座,同時應(yīng)根據(jù)橋墩自身受力特點合理布置橋墩鋼筋�？傊�,本文研究成果在十堰至天水高速公路項目上得到成功應(yīng)用的同時,也為高烈度區(qū)預(yù)應(yīng)力混凝土箱梁橋墩的減隔震設(shè)計提供參考。
[Abstract]:Prestressed concrete box girder is the main bridge type of expressway in China, and is widely used. In recent years, as the main load-bearing member directly affected by earthquake force, the seismic behavior of pier is especially important. Therefore, the seismic calculation of prestressed concrete continuous box pier in high intensity region is studied in this paper. In this paper, based on the research background of Shiyan to Tianshui Expressway (Gansu Section), the whole bridge model is established by using Midas2010 finite element analysis software for the bridge of Jiayayangyang River Bridge and Xiakou Bridge. The aseismic construction measures and seismic reinforcement of piers are also discussed. In order to compare and study, the calculation conditions include the seismic dynamic time history analysis of "ordinary basin bearing bridge", the seismic dynamic time history analysis of "ordinary plate bearing bridge" and the seismic dynamic time history analysis of "HDR isolated bearing bridge". Referring to the experience of seismic fortification at home and abroad and referring to the current code, the dynamic characteristics of bridge pier are calculated and analyzed in detail. After the bridge pier enters plastic state under E2 earthquake, the HDR isolation bearing is more common than the basin type and the plate type rubber bearing. The shear design value of the transverse bridge in the plastic hinge region and the displacement value of the piers along the bridge are obviously decreased, and the pier can meet the requirements of the force and displacement only under the condition of the HDR isolation support. Therefore, when the reinforcement of highway bridge in high intensity area is restricted by the structural requirements and construction technology, it is appropriate to adopt the isolation support, and at the same time, the reinforcement should be reasonably arranged according to the bearing characteristics of the pier itself. In a word, the research results of this paper have been successfully applied in Shiyan-Tianshui expressway project, and also provide a reference for the seismic isolation design of prestressed concrete box girder pier in high intensity area.
【學(xué)位授予單位】：長安大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：U442.55;U443.22

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本文編號：1907273