本文關(guān)鍵詞：考慮豎向地震力下橋墩的抗震性能研究　出處：《長安大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 橋墩 豎向地震 時程分析 位移 抗剪強度

【摘要】：許多的地震災(zāi)害現(xiàn)象用水平地震對結(jié)構(gòu)破壞起控制作用的傳統(tǒng)觀點無法解釋,國內(nèi)對于豎向地震力的研究目前主要是針對多層建筑和煙囪結(jié)構(gòu),而橋墩與多層建筑中的框架柱、煙囪等一樣屬于細長結(jié)構(gòu),并且橋墩是在地震作用下易發(fā)生破壞的重要構(gòu)件,因此有必要對橋墩在考慮豎向地震力下的抗震性能進行研究分析。簡述了橋梁抗震計算分析方法,整理、對比了多個橋墩抗剪強度計算公式,得出的結(jié)論是與其他計算公式相比,經(jīng)與試驗結(jié)果相比較證明,Priestley公式計算的抗剪強度與橋墩的實際抗剪強度更符合。本文基于有限元分析軟件Midas Civil建立單柱墩模型,對橋墩塑性鉸區(qū)域進行纖維劃分,采用非線性動力時程方法進行計算,研究了在不同軸壓比、長細比以及地震波作用下橋墩的墩頂位移和墩底抗剪強度,得到不同軸壓比、長細比以及地震波下考慮豎向地震力對結(jié)構(gòu)抗震性能造成的影響。通過建立簡支梁橋、連續(xù)梁橋、連續(xù)剛構(gòu)橋三個全橋模型,研究了豎向地震力對不同橋梁結(jié)構(gòu)形式橋墩抗震性能造成的影響。通過對不同影響因素下考慮豎向地震力前后橋墩的抗震性能進行對比分析,得到了一些結(jié)論,豎向地震力對橋墩抗震性能的影響主要是在于對橋墩抗剪強度的削弱,而對墩頂位移的影響較小。
[Abstract]:Many of the earthquake disaster phenomena with the traditional view of the role of horizontal earthquake damage control structure cannot explain the domestic study on the vertical seismic force is mainly aimed at the multi-storey buildings and chimney structure, and the pier and the multi-storey building frame column, such as fine long chimney belongs to the structure, and the pier is an important component of failure occurs at under the action of earthquake, so it is necessary to analyze the seismic performance of the pier considering vertical seismic force. The bridge seismic analysis method, sorting, comparing the pier shear strength formula, the conclusion is compared with other calculation formula, by comparing with the experimental results show that the Priestley formula the calculation of the shear strength and the shear strength of the pier is more in line with the actual. In this paper, the finite element analysis software Midas Civil based on the model of single pier, pier on the plastic hinge region Fiber divided by the nonlinear time history method to calculate, studied under different axial compression ratio, slenderness ratio of pier under seismic waves and displacement of pier top and bottom of the pier shear strength, different axial compression ratio, slenderness ratio and the effect of seismic wave under vertical seismic force caused by seismic structure performance. Through the establishment of a simple supported beam bridge, continuous beam bridge, continuous rigid frame bridge with three full bridge model, studied the impact of vertical earthquake on the seismic performance of the bridge structure form different piers. Considering the comparative analysis of seismic performance of bridge piers and the vertical seismic force by different factors on the influence, some conclusions were obtained, the effect of vertical the seismic force on the pier seismic performance mainly depends on the shearing strength of the pier weakened, but little influence on the displacement of the pier top.

【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：1406092