發(fā)布時(shí)間：2018-11-07 07:50

【摘要】：連續(xù)剛構(gòu)橋有著諸多的優(yōu)點(diǎn)，，是國內(nèi)大范圍使用的一種橋梁結(jié)構(gòu)形式。然而，現(xiàn)階段抗震設(shè)計(jì)重點(diǎn)主要針對的是成橋使用階段，施工階段抗震性能研究成果較少，而連續(xù)剛構(gòu)橋在施工階段有著受力復(fù)雜、結(jié)構(gòu)形式不穩(wěn)定、施工工期長等特點(diǎn)，因此，施工階段抗震研究顯得十分必要。 特別在一些地震頻發(fā)的地區(qū)，或者剛發(fā)生完大震不久的地區(qū)，其余震較頻發(fā)(例如，日本福島大地震后，在其后的六個(gè)月時(shí)期內(nèi)，可觀測到的震級超過里氏1級的余震就有8305次)，對于這些地區(qū)的在建橋梁，施工階段抗震研究尤為重要。 本文研究的重點(diǎn)為在連續(xù)剛構(gòu)橋懸臂施工階段采用纜索減震的臨時(shí)措施，研究纜索參數(shù)的改變對減震效果的影響，主要內(nèi)容為： （1）纜索張拉橋墩情況下，本文分析了纜索張拉角度、位置對結(jié)構(gòu)地震響應(yīng)的影響，以得到減震效果最好的張拉參數(shù)；還對比分析了單根張拉和多根分散張拉時(shí)結(jié)構(gòu)的地震響應(yīng)，以確定哪種張拉方式減震效果最好。 （2）纜索張拉主梁情況下，本文分析了纜索張拉角度、位置對結(jié)構(gòu)地震響應(yīng)的影響，以得到減震效果最好的張拉參數(shù)；還對比分析了單根張拉和多根分散張拉時(shí)結(jié)構(gòu)的地震響應(yīng)，以確定哪種張拉方式減震效果最好。 （3）本文對比分析了只張拉橋墩、只張拉主梁及橋墩和主梁均張拉三種張拉形式隨高跨比變化結(jié)構(gòu)的地震響應(yīng)，以得到不同高跨比，減震效果最好的張拉形式。 （4）應(yīng)用上述研究成果，本文對四川某實(shí)橋進(jìn)行抗震分析驗(yàn)算，證明上述研究結(jié)論的準(zhǔn)確性。
[Abstract]:Continuous rigid frame bridge has many advantages. It is a kind of bridge structure which is widely used in our country. However, at the present stage of seismic design, the main focus of seismic design is the completion of the use of the bridge, the construction phase of seismic performance research results are less, while the continuous rigid frame bridge in the construction phase has the characteristics of complex force, unstable structure form, long construction period and so on. Therefore, the seismic research in construction stage is very necessary. Especially in some areas where earthquakes occur frequently, or where major earthquakes have just taken place, their aftershocks are more frequent (for example, in the following six months after the Fukushima earthquake in Japan, There are only 8305 aftershocks with magnitude 1 on the Richter scale. For the bridges under construction in these areas, it is very important to study the earthquake resistance in the construction stage. The emphasis of this paper is to adopt the temporary measures of cable vibration absorption in the cantilever construction of continuous rigid frame bridge. The main contents are as follows: (1) under the condition of cable tension pier, the effect of cable parameter change on vibration absorption effect is studied. In this paper, the influence of cable tension angle and position on the seismic response of the structure is analyzed, in order to obtain the best tensile parameters of the damping effect. The seismic responses of single tensioning and multiple dispersive tensioning structures are compared and analyzed in order to determine which tensioning method is the best. (2) in the case of cable tension main beam, the influence of cable tension angle and position on the seismic response of the structure is analyzed in order to obtain the best tensile parameters of the damping effect; The seismic responses of single tensioning and multiple dispersive tensioning structures are compared and analyzed in order to determine which tensioning method is the best. (3) in this paper, the seismic responses of the structures with only tensioned bridge piers, only tensioning main beams and bridge piers and main girders with the variation of height-span ratio are compared and analyzed, in order to obtain the best tension form with different height-span ratio and the best damping effect. (4) based on the above research results, the aseismic analysis and calculation of a real bridge in Sichuan Province are carried out to prove the accuracy of the above conclusions.
【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】：2014
【分類號】：U445.466;U441.3

【參考文獻(xiàn)】

相關(guān)期刊論文 前5條

1 鐘萬勰;;結(jié)構(gòu)動力方程的精細(xì)時(shí)程積分法[J];大連理工大學(xué)學(xué)報(bào);1994年02期

2 王亞勇;;結(jié)構(gòu)抗震設(shè)計(jì)時(shí)程分析法中地震波的選擇[J];工程抗震;1988年04期

3 唐咸遠(yuǎn);鄧志恒;;連續(xù)剛構(gòu)橋施工階段地震響應(yīng)分析研究[J];中國港灣建設(shè);2011年01期

4 張亞輝,趙巖,張春宇;大跨度橋梁抗震分析的空間效應(yīng)[J];中國鐵道科學(xué);2002年06期

5 鄭玉國;袁萬城;;基于CDR的典型大跨梁橋施工全過程抗震安全評價(jià)[J];中國安全科學(xué)學(xué)報(bào);2013年07期

本文編號：2315691