【摘要】：為確定山區(qū)非等高三塔斜拉橋合理的縱向抗震約束體系,以平塘特大橋?yàn)檠芯勘尘?采用非線性時(shí)程分析法進(jìn)行研究。基于結(jié)構(gòu)縱向地震反應(yīng),通過(guò)對(duì)比不同約束體系在地震作用下的響應(yīng),選取較為合理的縱向約束體系;通過(guò)在兩邊塔處設(shè)置液體黏滯阻尼器來(lái)減小結(jié)構(gòu)的地震響應(yīng),并進(jìn)行液體黏滯阻尼器參數(shù)敏感性分析,選取較為合理的阻尼器參數(shù);在此基礎(chǔ)上,通過(guò)對(duì)存在塔高差異的兩邊塔采用不同參數(shù)的液體黏滯阻尼器,進(jìn)一步優(yōu)化結(jié)構(gòu)受力和位移。研究結(jié)果表明:在兩邊塔處設(shè)置液體黏滯阻尼器可以顯著減小縱向地震作用下結(jié)構(gòu)的內(nèi)力和位移;通過(guò)兩邊塔采用不同參數(shù)的液體黏滯阻尼器,可以使三主塔所受內(nèi)力均較小,且邊塔可以更好地分擔(dān)中塔受力。
[Abstract]:In order to determine the reasonable longitudinal seismic restraint system of non-iso-tall three-tower cable-stayed bridge in mountainous area, a nonlinear time-history analysis method was used to study the Pingtang Bridge. Based on the longitudinal seismic response of the structure, the more reasonable longitudinal restraint system is selected by comparing the responses of different constrained systems under the earthquake, and the seismic response of the structure is reduced by setting liquid viscous dampers at the two sides of the tower. On the basis of analyzing the sensitivity of liquid viscous damper parameters and selecting more reasonable damper parameters, the liquid viscous damper with different parameters is applied to both sides of tower with different tower height. Further optimize the stress and displacement of the structure. The results show that the internal force and displacement of the structure under longitudinal earthquake can be significantly reduced by setting liquid viscous damper at the two sides of the tower, and the internal force of the three main towers can be reduced by using the liquid viscous damper with different parameters on both sides of the tower. And the side tower can better share the force of the middle tower.
【作者單位】： 貴州省交通規(guī)劃勘察設(shè)計(jì)研究院股份有限公司;中南大學(xué)土木工程學(xué)院;高速鐵路建造技術(shù)國(guó)家工程實(shí)驗(yàn)室;
【基金】：中南大學(xué)創(chuàng)新驅(qū)動(dòng)計(jì)劃資助項(xiàng)目(2015CX006) 國(guó)家自然科學(xué)基金資助項(xiàng)目(51308549)
【分類號(hào)】：U442.55;U448.27

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