摘要
摘要
城市轨道交通是市民出行的重要选择，我国是城市轨道交通大国，地下车站作为城市轨道交通的枢纽，对其结构的抗震研究很重要。国内外学者对地下结构的地震响应研究很多，且大多是基于地震波垂直入射的研究。但实际情况下，地震波很少是垂直入射的。地下结构的地震响应主要受场地运动差异的影响，而地震波斜入射时，造成的自由场地震响应与垂直入射时存在差别，因此研究斜入射地震波对地下车站结构的影响是有必要的。本文为探讨斜入射地震波作用下，地下结构的地震响应，先对基岩上覆均质土层场地作用斜入射地震波进行线性地震响应分析，然后对水平成层场地作用斜入射地震波进行非线性地震响应分析，并将非线性场地的分析结果用到反应位移法中，分析斜入射地震波引起的地下车站结构的响应。本文成果如下：
（1）分析了基岩上均质土层场地在斜入射地震波作用下的线性地震响应特性。从频域角度出发，集整土层动力刚度矩阵，求解基岩上覆均质土层的自由场线性地震响应。通过计算不同地震波以不同入射角作用到自由场而产生的自由场响应得出结论。结果表明不同地震波在斜入射时自由场的响应存在差异，SH、SV 波斜入射时，土层的峰值位移、峰值加速度响应会出现大于垂直入射的情况。斜入射地震波造成的自由场响应在不同深度处存在差别。
（2）在线性算法的基础上结合等效线性的计算方法，研究水平成层场地斜入射地震波作用下的非线性场地响应。结果表明，斜入射地震波作用下，水平成层非线性自由场与均质土层线性自由场所得结论一致，斜入射地震波引起的地震响应会出现大于地震波垂直入射时的情况。
（3）利用水平成层非线性自由场的场地分析结果，分析了斜入射地震波作用下地下结构地震响应特性，其中，入射角根据场地反应分析结果选取SV波82°、72°和SH波55°、35°以及垂直入射的情况，并考虑入射波幅值0.2g和0.4g以及地震波控制点在基岩和自由场表面的情况。计算结果表明，斜入射地震波引起的地下结构的地震响应会出现大于垂直入射地震波引起的响应的情况。地震波控制点的不同造成地震波斜入射下，场地的响应不同，从而影响地下结构的抗震响应。入射波幅值为0.2g时，控制点选在基岩的斜入射地震波，计算出结构内力与层间位移结果要小于控制点选在自由场表面的结果。而入射波幅值为0.4g时，与之相反。故在考虑地震波斜入射时，出于结构安全考虑，对地下结构的抗震设计及分析应综合考虑入射波的幅值与控制点的选择。
关键词：斜入射；自由场；地下结构；抗震分析；入射角；临界入射角；控制点
ABSTRACT
漫画男生ABSTRACT
Urban rail transit is an important choice for citizens to travel.China is a major country in urban rail transit.Underground stations rve as the hub of urban rail transit, and its ismic rearch is very important.Scholars at home and abroad have done a lot of rearch on the ismic respon of underground structures,and most of them are bad on the vertical incidence of ismic waves.But in reality,ismic waves are rarely incident vertically.The ismic respon of the underground structure is mainly affected by the difference in site motion,and the ismic respon of the free field caud by the oblique incidence of the ismic wave is different from that of the vertical incidence. Therefore,it is necessary to study the impact of obliquely incident ismic waves on the structure of the underground station.In order to discuss the ismic respon of underground structures under the action of obliquely incident ismic waves,the linear ismic respon analysis of the obliquely incident ismic waves at the site of the homogeneous soil layer overlying the bedrock is carried out first,and then the non-linear ismic respon of the obliquely incident ismic waves at the horizontal layered site The analysis and the results of the nonlinear site analysis are ud in the reaction displacement method to analyze the respon of the underground station structure caud by oblique incident ismic waves.The results of this article are as follows:
(1)The linear ismic respon characteristics of the homogeneous soil layer on the bedrock under t
he action of oblique incident ismic waves are analyzed.From the perspective of frequency domain,the dynamic stiffness matrix of the entire soil layer is collected to solve the free-field linear ismic respon of the homogeneous soil layer overlying the bedrock,and the calculation result is converted into the time domain in combination with the inver Fourier transform.The calculation process is realized by Fortran programming.The conclusion is drawn by calculating the free field respon of different ismic waves acting on the free field at different incident angles.The results show that different ismic waves have different respons to the free field when obliquely incident.When the SH and SV waves are obliquely incident,the peak displacement and peak acceleration respon of the soil layer will be greater than that of normal incidence.The free field respon caud by oblique incident ismic waves is different at different depths.
北京交通大学硕士学位论文
(2)On the basis of the linear algorithm and the calculation method of equivalent linearity,the nonlinear site respon under the action of obliquely incident ismic waves on a horizontally layered site is studied.The results show that under the action of obliquely incident ismic waves,the horizontally layered nonlinear free field agrees with the linear free field of homogeneous soil layers.The ismic respon caud by obliquely incident ismic waves will be greater than when t
he ismic waves are perpendicularly incident.
(3)Using the site analysis results of the horizontally layered nonlinear free field, the ismic respon characteristics of the underground structure under oblique incident ismic waves are analyzed.Among them,the SV wave82°,72°and SH wave55are lected according to the site respon analysis results°,35°and normal incidence,and consider the incident wave amplitudes of0.2g and0.4g and the ismic wave control points on the bedrock and free field surface.The calculation results show that the ismic respon of underground structures caud by obliquely incident ismic waves will be greater than that caud by vertically incident ismic waves.The different control points of ismic waves cau the site respon to be different under oblique incidence of ismic waves,thus affecting the ismic respon of underground structures.When the incident wave amplitude is0.2g,the control point is lected at the oblique incidence ismic wave of the bedrock,and the calculated internal force and interlayer displacement results are smaller than the control point lected at the free field surface.When the incident wave amplitude is0.4g,the opposite is true.Therefore, when considering the oblique incidence of ismic waves,due to structural safety considerations,the ismic design and analysis of underground structures should comprehensively consider the amplitude of the incident wave and the choice of control points.
KEYWORDS：Oblique incidence；Free field;Underground structure;Seismic analysis; Angle of incidence;Critical incident Angle;Control point
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目录
目录
摘要 (v)
美丽的校园作文400字四年级ABSTRACT (vii)
1引言 (1)
1.1研究背景和意义 (1)
1.2地震波斜入射研究现状 (2)
1.2.1地震波斜入射时自由场响应研究 (2)
1.2.2地震波斜入射下地下结构的抗震研究 (3)
简短走心的句子>爱国名言有哪些1.3本文主要研究内容及目标 (5)
1.4本文创新点 (5)
2基岩上覆盖均质土层场地斜入射地震波线性地震响应分析 (7)
2.1土层模型 (7)
2.2斜入射SH波作用下均质土层自由场线性响应分析 (8)
2.2.1计算方法 (8)
2.2.2SH波斜入射时均质土层自由场峰值加速度响应 (9)
2.2.3SH波斜入射时均质土层自由场峰值位移响应 (11)
2.3斜入射体波作用下均质土层自由场线性响应分析 (12)
2.3.1计算方法 (13)
2.3.2P波斜入射时均质土层自由场峰值加速度响应 (15)
老干部工作总结
2.3.3P波斜入射时均质土层自由场峰值位移响应 (18)
2.3.4SV波斜入射时临界入射角求解 (20)
2.3.5SV波斜入射下自由场加速度反应分析 (21)
2.3.6SV波斜入射下自由场峰值位移反应分析 (23)
2.4本章小结 (26)
3斜入射地震波成层土场地非线性地震响应分析 (29)
3.1土层模型和参数 (29)
3.2斜入射SH波作用下成层土自由场非线性响应分析 (31)
3.2.1SH波斜入射时自由场峰值加速度响应分析 (31)
3.2.2SH波斜入射时自由场峰值位移响应分析 (33)
3.2.3SH波斜入射时自由场相对位移响应分析 (35)
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对公司的寄语北京交通大学硕士学位论文
3.3斜入射P波作用下成层土自由场非线性响应分析 (36)
3.3.1P波斜入射时自由场峰值加速度响应分析 (36)
3.3.2P波斜入射时自由场绝对位移响应分析 (39)
3.4斜入射SV波作用下成层土自由场非线性响应分析 (41)
3.4.1SV波斜入射时自由场峰值加速度响应分析 (42)
3.4.2SV波斜入射时自由场绝对位移响应分析 (45)
3.4.3SV波斜入射时自由场相对位移响应分析 (47)
3.5本章小结 (48)
4斜入射地震波作用下地下车站抗震响应 (51)
4.1地震波数据的选取 (51)
4.2反应位移法模型 (52)
4.3SV波斜入射时地下车站的抗震分析 (52)
4.3.1SV波斜入射下地下结构位移分析 (53)
4.3.2SV波斜入射下地下结构内力分析 (55)
4.4SH波斜入射时地下车站的抗震分析 (63)
4.4.1SH波斜入射下地下结构位移分析 (63)
4.4.2SH波斜入射下地下结构内力分析 (66)
4.5本章小结 (73)
5结论与展望 (75)
5.1本文结论 (75)
5.2不足和展望 (76)
参考文献 (77)
作者简历及攻读硕士学位期间取得的研究成果 (81)
一、作者简历 (81)
独创性声明 (83)
淘汰的英文是pass吗
学位论文数据集 (85)
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