In fact , there should be different design spectra corresponding with the structures of different damping - ratios , the new code for seismic design for buildings ( gb50011 - 2001 ) has provided corresponding spectra for structures with different damping - ratios 事实上，具有不同阻尼比的结构就应有不同设计反应谱与之对应， 《建筑抗震设计规范》 （ gb50011 - 2001 ） [ 6 ]已规定了不同阻尼比的标准设计反应谱。
It is shown that the lateral stiffness ratio of the third story to the second story suggested by the latest 《 code for seismic desing of building 》 ( gb50011 ) is relatively low and the reasonable value is proposed , which can be used for referrence to engineering designers 根据计算结果的分析，认为新颁布的《建筑抗震设计规范》 ( gb50011 )对于砌体过渡层与第二层框剪层的侧向刚度比限值偏小，并提出了合宜的刚度比取值范围，可供设计人员在抗震设计时参考和借鉴。
A primary scheme of site classification was presented , in this scheme a new site classification method that can consider the profiles containing bottom , mid or top soft layer was put forward on the basis of the site classification in the current code for seismic design of buildings 提出了基于土层结构的场地分类的初步方案。在现行建筑抗震设计规范四类场地划分的基础上，进一步根据不同土层结构对每类场地再细划分为三个亚类，并给出其相应的设计反应谱。
So it ' s necessary and important to research the asymmetric - plan structures " earthqu ake response in order to improve the code for the seismic design . this dissertation is a part of the national science foundation subject " effects of torsion on nonlinear seismic response of structures " ( the code number : 59978055 ) 因此，深入开展平面不规则结构的地震反应规律的研究，为完善结构抗震设计规范中的相关条文提供依据，这项工作将是十分必要和有重要意义的。
But the method of site classification still has some problems . for example , two sites which belong to the same site sort and only the position of soil layer is different have the same design response spectra according to the code for seismic design of buildings ( gb 50011 - 2001 ) 目前场地分类的方法还存在一些问题，例如，相同类别的两个场地，仅是软弱夹层所在位置不同，其它参数完全相同，按现行建筑抗震设计规范( gb50011 ? 2001 )就会给出相同的设计反应谱。
The evolution , state of the art and the developing trend of the lateral seismic inertia force calculation for retaining wall and / or bridge abutment and the calculation of the seismic cohesive backfill soil pressure are reviewed . the approaches of seismic analysis of retaining walls and bridge abutments in the current highway codes of china are studied in detail and the shortcomings in the analysis procedure and the necessity of further improvements to them are pointed out 综合评述国内外公路工程抗震设计规范中地震作用计算方法以及地震土压力计算方法的演进历史及现状，详细分析我国现行公路工程抗震设计规范中挡土墙和桥台的抗震验算方法，指出存在的问题和解决这些问题的必要性。
According to the need of design code for anti - seismic of engineering constructure , the bedrock peak acceleration rate and response spectrum of exceeding probability of 63 % , 10 % and 2 % are given respectively and seismic motion parameters are also calculated , which will provide the evidences for anti - seismic design of this electric power equipment station 按工程建筑物抗震设计规范要求，分别给出了50年63 % 、 10 %和2 %超越概率水平的基岩峰值加速度及反应谱，计算出地震动参数，为该电力设备站建设提供了抗震设计依据。
With an analysis of soil liquefaction potential for free field of nanjing metro line 1 under 7 degree earthquake , as well as for excavated field , in line with railway engineering anti - earthquake design specification , dynamic triaxial tests and theoretical analysis using efficient stress method , the author comes to the conclusion that , when metro plate is located at layer s and the layer is thick , liquefied area is at metro bottom plate ; in some local section liquefied area is at metro top plate , or arch sides at the top of metro in most places 摘要采用铁路工程抗震设计规范、动三轴试验及有效应力的理论分析相结合的方法，对南京地铁南北线（ 1号线）区间隧道开挖后其地基土在7度地震情况下的土层液化情况进行分析得出：当隧道底板坐落在5层且5层较厚时的液化区出现在隧道衬砌底板处；局部地段液化区出现在隧道顶部及拱腰；大部分地段的液化区出现在隧道顶板上方。
Abstract : in this paper , the efficient stress method is used as main means , while the railway engineering anti - earthquake design specification and the dynamic triaxial test are used as additional means . the authors analyze the ground layer liquefaction of shield tunnelling built on powder soil or fine sand , whose top plate is buried under two kinds of depth , and conclude that the liquefaction area is different with different buried depth . finally , the rational buried depth is proposed 文摘:以有效应力原理的有限元计算分析为主、铁路工程抗震设计规范及室内动三轴实验为辅，对修建在粉土或粉细砂层中的盾构隧道进行了两种不同埋深情况下的液化分析，得出了埋深不同液化区出现区域不同的结论，并提出隧道抗液化的合理埋深。
The essay combines " code for seismic design of buildings " ( gb50011 - 2001 ) , analyzing and discussing bent structure of one - story industry buildings tinder the interaction of the seismic , ground - structure , and works out calculation model for bent structure ' s dynamic period about the depth of burying foundation and toft transmutation ; the model is employed expediently , adapts to actual engineer construction design at present 本文结合我国《建筑抗震设计规范》 ( gb50011 - 2001 ) ，对单层工业厂房排架结构在地震作用下土?结构共同作用问题进行了分析讨论，给出了考虑基础埋深与地基变形影响时排架结构自振周期的计算模型；这?模型应用方便，适合目前实际工程结构设计使用。
