Experimental investigation on the seismic response of a steel liquid storage tank equipped with floating roof by shaking table tests     

M. De Angelis  R. Giannini  F. Paolacci 《地震工程与结构动力学》2010,39(4):377-396

In this paper, the effectiveness of the base isolation on steel storage tanks has been investigated through numerical models and then checked by shaking table tests on a reduced scale (1:14) model of a real steel tank, typically used in petrochemical plants. In the experimental campaign the floating roof has also been taken into account. The tests have been performed on the physical model both in fixed and isolated base configurations; in particular two alternative base isolation systems have been used: high‐damping rubber bearings devices and sliding isolators with elasto‐plastic dampers. Finally, a comparison between experimental and numerical results has also been performed. Copyright © 2009 John Wiley & Sons, Ltd.  相似文献   

复合隔震支座在网格屋盖结构中的应用研究     

唐柏鉴  张建 《地震工程与工程振动》2010,30(1)

将铅芯橡胶隔震垫与碟簧组合形成复合隔震垫,并应用于网格屋盖结构,利用串联弹簧模型预估铅芯橡胶隔震垫参数,利用单质点弹簧模型预估碟簧参数,结合实际工程,进行了模态分析、水平地震动时程分析及竖向地震动时程分析,表明复合隔震技术降低屋盖、下部结构加速度反应60%左右,降低由于地震引起的基顶反力约30%,但水平地震下隔震屋盖的侧移增大显著,应引起注意;文中提出的隔震垫参数预估模型得到了地震动时程分析的验证,可为工程参考。  相似文献   

浅埋地下结构顶板在竖向地震作用下的动力响应   总被引：1，自引：0，他引：1  

陈灿寿  戚承志  钱七虎  李信桥 《世界地震工程》2010,26(4)

采用结构动力学的方法研究了浅埋地下箱形结构在竖向地震作用下的动力响应。鉴于土与结构动力相互作用分析的复杂性,为了简化分析,整个分析过程分为2步。第1步把结构看作是刚体,利用刚体与地基的相互作用分析求得刚体在竖向地震分量作用下的动力响应;第2步首先考虑到了侧墙对于顶板的抗弯约束作用,求得了顶板的固有频率及振型,并把第1步刚体的动力响应作为输入求解顶板梁的受迫振动,进而求得了顶板弯矩。  相似文献   

不育胞质对水稻杂种种子活力的效应初探     

《广东海洋大学学报》1997,(2)

  相似文献   

五轮山井田工程地质特征分析     

曹志德  赵洪 《中国煤田地质》2005,17(5):71-74

简述了井田基本地质特征;利用地质报告资料对本区的工程地质特征进行了分析,确定本区的工程地质问题复杂程度为中等,将区内煤系地层划分为8个工程地质岩组;重点阐述了煤层顶底板工程地质特性;指出了煤矿开采过程中可能发生的工程地质问题和主要环境地质问题;对区内可能发生的不良地质现象提出了治理建议.  相似文献   

Geovisualization of Human Hybrid Activity-Travel Patterns   总被引：4，自引：0，他引：4  

Fang Ren  Mei-Po Kwan 《Transactions in GIS》2007,11(5):721-744

While GIS‐based geovisualization techniques have been fruitfully employed in a wide range of fields, they have not been applied to explore human hybrid activity‐travel patterns (i.e. the patterns of people's activities and/or travel in both the physical and virtual worlds). This study develops two geovisualization approaches using 3D and 2D GIS techniques to address the difficulties faced by past studies. First, the notions of information cube and hybrid 3D space‐time paths are developed to accommodate cyberspatial activities in exploratory data analysis. Second, a new representation of 2D space‐time paths that incorporates parallel coordinate plots is developed for exploring the multiple attributes of people's Internet and physical activities. These two methods were implemented using ArcObjects and the Visual Basic for Applications environment in ArcGIS. They were used to visualize a complex Internet‐activity diary dataset collected in Columbus (Ohio, USA). The study shows that the 3D and 2D geovisualization methods developed allow us to uncover important patterns in hybrid human activity‐travel behavior.  相似文献   

Semi-automatic approach toward mapping of flat-roofed buildings within a non-stereoscopic environment     

Yair  Avrahami  Yuri  Raizman  Yerach  Doytsher 《The Photogrammetric Record》2007,22(117):53-74

  相似文献   

声波测井在煤层顶板稳定性评价中的应用效果   总被引：2，自引：0，他引：2  

潘建西  王水 《陕西地质》2006,24(1):81-84

通过测井技术,用获得的强度指数(R)来评价岩石强度,其结果与地质研究结论是一致的,也就是说,用声波测井可直接判断煤层顶板的稳定性。实践表明,越靠近煤田边界煤层顶板岩石强度指数越小,顶板也越不稳定,越靠近煤田中心部位煤层顶板岩石强度指数越大,煤层顶板也越稳定。  相似文献   

The roof strata tilt approach to pack design—a Case Study     

B. G. D. Smart  S. M. Haley  J. D. Celentano 《Geotechnical and Geological Engineering》1987,5(2):155-160

  相似文献   

Mediating science and action across multiple boundaries in the Coral Triangle     

《Global Environmental Change》2014

This study seeks to refine literature on boundary work by exploring how stakeholders in the Coral Triangle Initiative, an international agreement between six countries in Southeast Asia and the Pacific, are forging relations across various domains and governance levels, and the outcomes of this process. We do this in an effort to increase its relevance to multi-level environmental governance, and understand the challenges that face such governance. We are also interested in the pathways leading to policy outcomes that are perceived as salient, credible, and legitimate to all stakeholders involved in governance. The study shows that boundary work is challenged by resource inequalities resulting in limited knowledge diversity, blurred boundaries between science and politics, and misaligned scales. We conclude that boundary work has an important temporal dimension that has often been neglected, and that literature on boundary work must provide a conceptual guide to understand tradeoffs arising as a result of stakeholders’ various strategies to engage in boundary work.  相似文献