- 摘 要
-
(1 天津大學(xué)建筑工程學(xué)院，天津 300072； 2 天津華廈建筑設(shè)計(jì)有限公司，天津 301600)
［摘要］采用動(dòng)力有限單元法建立層狀場地中地鐵隧道和鄰近建筑物整體地震反應(yīng)計(jì)算模型。結(jié)合粘彈性人工邊界, 利用大質(zhì)量法輸入地震波，實(shí)現(xiàn)了該半無限域內(nèi)波動(dòng)問題的準(zhǔn)確求解。通過詳細(xì)的參數(shù)分析，研究地鐵隧道埋深、建筑物和隧道間距等因素對建筑物地震反應(yīng)的影響特征。研究表明：軟土層中地鐵隧道對附近建筑物地震反應(yīng)具有顯著的影響，地鐵的存在使得附近建筑物頂層水平位移反應(yīng)峰值放大了近30%。而豎向地震輸入下，地鐵對建筑物的影響相對較弱。實(shí)際地鐵沿線附近建筑物需適當(dāng)提高地震動(dòng)輸入水平。
［關(guān)鍵詞］層狀場地；地鐵隧道；地震反應(yīng)；有限單元法；粘彈性邊界；地鐵沿線建筑物
Effect of tunnels on earthquake response of ground and buildings along the subway in layered site
Fu Yuyong1, Yan Shuwang1, Hu Zixue2(1 Department of Civil Engineering, Tianjin University, Tianjin 300072, China;2 Tianjin Huaxia Building Design, Ltd., Tianjin 301600, China)
Abstract:The whole model of earthquake response of the subway and nearly buildings was established using dynamic FEM. The viscous-pring artificial boundary which is important for the wave motion problem in semi-infinite domain is employed to calculate the effect of the depth, the distance of the tunnel and the soil layer prosperities more accurately. By the detailed parameter study, it is shown that the tunnels in soft soil have significant influence to the nearby buildings, and the displacement in the top of the building can be amplified up to 30%. The vertical earthquake response of the building seems to be less influenced relatively by the tunnels. It is suggested that the earthquake input of those buildings along the subway should be properly improved.
Keywords:layered site; subway tunnels; earthquake response; FEM; viscous-pring artificial boundary
作者簡介：傅玉勇，博士，Email:earth0101@163.om。
參考文獻(xiàn)
［1］莊海洋，陳國興.軟弱地基淺埋地鐵區(qū)間隧洞的地震反應(yīng)分析［J］.巖石力學(xué)與工程學(xué)報(bào)，2005，24(14)：2506-512.
［2］張鴻，畢繼紅，張偉.地鐵隧道地震反應(yīng)非線性分析［J］.地震工程與工程振動(dòng)，2006，24(6)：146-53.
［3］LEE V W, TRIFUNAC M D. Response of tunnels to incident SH aves［J］. Journal of Engineering Mechanics, ASCE, 1979, 105: 643-59.
［4］梁建文, 尤紅兵. 層狀半空間中洞室對入射平面P波的放大作用［J］. 地震工程與工程振動(dòng), 2005, 25(2)：16-4.
［5］梁建文, 紀(jì)曉東, LEE V W. 地下圓形襯砌隧道對沿線地震動(dòng)的影響(Ⅱ)數(shù)值結(jié)果［J］. 巖土力學(xué), 2005,26(5): 687-92.
［6］劉晶波，谷音，杜義.一致粘彈性人工邊界及粘彈性邊界單元［J］. 巖土工程學(xué)報(bào)，2006，28(9):1070-079.
［7］LEGER P，IDE I M，PAUHRE P. Multiple support seismic analysis of large structures［J］.Computers ＆ Structures, 1990, 36：153-58.
- 下載地址
-
