高层隔震结构非线性地震响应分析及设计方法研究   总被引：3，自引：0，他引：3  

杜东升  王曙光  刘伟庆  王浩亮 《地震学刊》2010,(5):550-557

高层隔震结构的分析理论和设计方法是目前隔震技术向高层建筑推广的2个关键理论问题。本文以高烈度区宿迁市已经竣工的高层隔震建筑阳光大厦为工程实例,对高层隔震结构的非线性地震响应分析方法进行了研究,包括隔震支座竖向不同拉压刚度的模拟、各种类型的隔震支座水平力学特性的准确模拟,以及不同地震动输入方式和输入角度对隔震支座受拉情况的影响分析等;在此基础上,对隔震层的设计方法进行了分析,提出了隔震层设计的基本原则,进而给出了控制隔震层设计的基本指标,包括隔震支座的长期面压、极值面压、隔震层偏心率等;最后,对高层隔震结构的相关构造要求进行了必要的说明。  相似文献   

用数值模拟方法研究北京盆地对3～10s地震动的放大效应   总被引：1，自引：0，他引：1  

付长华  高孟潭  俞言祥 《地震研究》2015,38(3)

以北京盆地为例,针对不同的设定地震,研究了不同震源条件对盆地放大效应的影响。结果表明:尽管震源因素可对计算结果带来一些不确定性,但盆地内沉积物的厚度是控制3~10 s周期段地震动加速度反应谱的主要因素。因此,计算了盆地对3~10 s周期段地震动加速度反应谱的平均放大系数,并通过回归分析得到了平均放大系数与盆地等效沉积物厚度之间的函数关系。最后,结合北京盆地内高层建筑的分布,初步探讨了高层建筑地震致灾风险水平与盆地结构的关系。  相似文献   

Effects of riverbed scour on seismic performance of high-rise pile cap foundation     

Zhenfeng Han  Aijun Ye  Lichu Fan 《地震工程与工程振动(英文版)》2010,9(4):533-543

To explore the seismic performance of a high-rise pile cap foundation with riverbed scour, a finite element model for foundations is introduced in the OpenSees finite element framework. In the model, a fiber element is used to simulate the pile shaft, a nonlinear p-y element is used to simulate the soil-pile interaction, and the p-factor method is used to reflect the group effects. A global and local scour model is proposed, in which two parameters, the scour depth of the same row of piles and the difference in the scour depth of the upstream pile and the downstream pile, are included to study the influence of scour on the foundation. Several elasto-plastic static pushover analyses are performed on this finite element model. The analysis results indicate that the seismic capacity (or supply) of the foundation is in the worst condition when the predicted deepest global scout depth is reached, and the capacity becomes larger when the local scour depth is below the predicted deepest global scout depth. Therefore, to evaluate the seismic capacity of a foundation, only the predicted deepest global scout depth should be considered. The method used in this paper can be also applied to foundations with other soil types.  相似文献   

柳州市某小区高层商住楼地基基础选型探讨     

林秀凤  廖未来 《地质灾害与环境保护》2009,20(3):72-75

介绍了柳州市某小区高层商住楼各个勘察阶段的岩土工程地质条件,重点通过对基础方案的技术可行性和经济成本两方面对比,探讨了该商住楼地基基础的选型问题,以工程实例告诫地质技术人员从事岩土工程勘察需要注意细节工作。  相似文献   

Study on the seismic performance of a double spherical seismic isolation bearing   总被引：1，自引：1，他引：0  

Tianbo Peng  Jianzhong Li  Yan Xu  Lichu Fan 《地震工程与工程振动(英文版)》2008,7(4):439-446

In this paper, the configuration and working mechanism of the recently developed double spherical seismic isolation （DSSI） bearing are introduced in detail. Then, vertical displacement of the DSSI bearing due to sliding on a spherical surface is analyzed. The results from seismic performance testing of the bearing are given, and a numerical analysis of a four span continuous girder bridge is performed. The numerical analysis compares the influence of three different bearing arrangement schemes on the structural seismic response, and the results show that the DSSI bearing is effective in increasing the vertical load bearing capacity, reducing the vertical displacement, and controlling the energy dissipation capacity within a certain range.  相似文献   

Response analysis of rigid structures rocking on viscoelastic foundation     

Alessandro Palmeri  Nicos Makris 《地震工程与结构动力学》2008,37(7):1039-1063

In this paper the rocking response of slender/rigid structures stepping on a viscoelastic foundation is revisited. The study examines in depth the motion of the system with a non‐linear analysis that complements the linear analysis presented in the past by other investigators. The non‐linear formulation combines the fully non‐linear equations of motion together with the impulse‐momentum equations during impacts. The study shows that the response of the rocking block depends on the size, shape and slenderness of the block, the stiffness and damping of the foundation and the energy loss during impact. The effect of the stiffness and damping of the foundation system along with the influence of the coefficient of restitution during impact is presented in rocking spectra in which the peak values of the response are compared with those of the rigid block rocking on a monolithic base. Various trends of the response are identified. For instance, less slender and smaller blocks have a tendency to separate easier, whereas the smaller the angle of slenderness, the less sensitive the response to the flexibility, damping and coefficient of restitution of the foundation. Copyright © 2008 John Wiley & Sons, Ltd.  相似文献   

高层分段隔震结构的动力响应分析     

王学庆  刘海卿 《地震工程与工程振动》2008,28(1):170-174

本文提出了一种基于叠层橡胶支座的大高宽比高层建筑分段隔震结构形式,并对同一高层建筑结构分别采用基础隔震、层间隔震和分段隔震三种不同形式时进行了数值模拟对比分析。结果表明,采用分段隔震形式可明显减小高层建筑结构的顶层侧向位移、中间隔震层的相对位移和下支柱端应力,使结构的侧向位移集中于两个隔震层上,耗散了大部分地震输入能量,保障了与隔震层相连的构件的安全性,防止了由于支座受拉或剪压破坏导致上部结构倾覆倒塌现象的发生。  相似文献   

石质构件风化层内力学性能变化规律研究   总被引：2，自引：1，他引：1  

刘成禹  何满潮 《工程地质学报》2007,15(2):222-227

石质构件风化层内力学参数随深度变化的规律是石质古建筑稳定性、耐久性和保护方案研究中重要的内容。本文针对古建筑石质构件风化层不便取样,风化岩样加工易破坏和室内试验只能得出试件整体的力学参数,不能反映风化层内力学参数由表及里逐渐变化的不足,综合运用现场声波测试和室内试验对义乌宋代古月桥(建于1213年)风化条石的抗压强度、弹性模量与深度的关系进行了研究。研究表明,风化层内岩石弹性模量、抗压强度与未风化区域的比值随深度呈较好的负指数关系。  相似文献   

淮安某高层建筑物沉降监测及其结果分析   总被引：1，自引：0，他引：1  

丁广龙 《测绘信息与工程》2011,36(3):26-27,51

介绍了淮安市第一人民医院病房楼沉降监测方案,阐述了沉降观测中需要注意的问题,并对沉降监测成果作出了分析。  相似文献   

泥浆护壁钻孔灌注桩桩端后注浆技术的研究与应用     

杨礼锋 《中国煤炭地质》2011,(9):67-68

选择场地内有代表性的位置,做了三组单桩竖向承载力特征值试验,一组为SZ1～SZ3,桩径φ600mm,桩端后注浆,另一组为SZ4～SZ6,桩径φ800mm,不注浆;第三组为SZ7～SZ9,桩径φ600mm,不注浆;三组桩的桩长均为34m;在布置桩位时,注浆桩SZ1～SZ3与非注浆桩SZ4～SZ9间距保持20m以上,以防止桩端后注浆对其产生影响。试验结果表明,SZ1～SZ6最低单桩竖向承载力特征值为2 900kN;SZ7～SZ9最低单桩竖向承载力特征值为2 100kN;泥浆护壁钻孔灌注桩采取桩端后注浆技术,其单桩竖向承载力特征值至少提高38.1%,单桩工程造价减少21.3%。  相似文献