發(fā)布時間：2018-05-28 05:27

  本文選題：抗震設(shè)計 + 地基彈簧��； 參考：《地震工程學(xué)報》2016年05期

【摘要】：隨著城市軌道交通工程抗震性能越來越受到關(guān)注,反應(yīng)位移法作為一種簡捷的抗震設(shè)計方法被大量應(yīng)用于地下結(jié)構(gòu)抗震設(shè)計中。地基彈簧系數(shù)的確定方法是反應(yīng)位移法抗震設(shè)計中最為重要的因素之一,本文選取試驗法、李英民法、MIDAS法和有限元法,結(jié)合北京典型地層,對比分析這四種方法地基彈簧系數(shù)取值對地下結(jié)構(gòu)的彎矩、軸力和剪力的影響規(guī)律。結(jié)果表明:(1)在反應(yīng)位移法計算中,地基彈簧系數(shù)取值對結(jié)構(gòu)內(nèi)力響應(yīng)具有重要影響,對結(jié)構(gòu)軸力和剪力的影響較大,而對于彎矩的影響相對較小;(2)地基彈簧系數(shù)獲取方法優(yōu)選試驗法,在無地勘資料情況下,經(jīng)驗公式和有限元法可作為備選方法;(3)綜合考慮四種不同地基彈簧系數(shù)確定方法對結(jié)構(gòu)內(nèi)力影響程度,為保證結(jié)構(gòu)設(shè)計的安全性,可對試驗法下結(jié)構(gòu)內(nèi)力進(jìn)行系數(shù)修正,修正系數(shù)建議值為1.10。
[Abstract]:With the increasing attention to the seismic performance of urban rail transit engineering, the response displacement method as a simple seismic design method has been widely used in the seismic design of underground structures. The determination method of spring coefficient of foundation is one of the most important factors in seismic design of reactive displacement method. In this paper, the test method, Li Ying civil law and Midas method and finite element method are selected, combined with typical strata in Beijing. The influence of spring coefficient on bending moment, axial force and shear force of underground structure is analyzed. The results show that in the calculation of the reaction displacement method, the spring coefficient of the foundation has an important influence on the internal force response of the structure, and has a great influence on the axial force and the shear force of the structure. However, the influence of bending moment on the spring coefficient of foundation is relatively small. The empirical formula and the finite element method can be used as alternative methods to consider comprehensively the influence of four different methods of determining the spring coefficient on the internal force of the structure. In order to ensure the safety of the structural design, the coefficient of the internal force of the structure under the test method can be revised. The recommended value of the correction coefficient is 1.10.
【作者單位】： 北京城建設(shè)計發(fā)展集團(tuán)股份有限公司;北京九州一軌隔振技術(shù)有限公司;
【基金】：北京市科學(xué)技術(shù)委員會科技新星計劃(xx2016008) 北京城建設(shè)計發(fā)展集團(tuán)股份有限公司科技創(chuàng)新計劃(2015-18)
【分類號】：TU93;U231

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本文編號：1945483