Evaluation, performance and design of concrete liquid containing structures

混凝土含液结构的评价、性能和设计

• 批准号: RGPIN-2016-04599
• 负责人: kianoush, Reza
• 金额: $ 2.62万
• 依托单位: Ryerson University
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2018
• 资助国家: 加拿大
• 起止时间: 2018-01-01 至 2019-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=655496
• 关键词: Evaluation; performance; design; concrete; liquid

Concrete liquid containing structures (CLCS) are extensively used for the storage of liquid and liquid-like materials including, water, oil, liquefied natural gas, chemical fluids, and wastes of different forms. Ground-supported tanks are more common in use because of their simplicity in design and construction. In addition they provide better resistance against hydrostatic and earthquake loading. These structures are considered as lifeline facilities, and their functional performance in terms of crack and leakage control is of significance. As numbers and sizes of storage tanks have increased over the years, so have their importance and the need to better understand their behavior under different loading conditions.**Canadian design standards do not directly address the structural design of CLCS and this has led to inconsistency in design of such facilities. Also, there is a great deal of inconsistency among the design standards for this important broad class of structures. This is mainly due to the lack of understanding of the behaviour of these structures under static and seismic loading. There is significant disagreement among design engineers on the validity of some of the provisions in codes and standards in this regard. One of the most controversial issue is related to the values used for the response modification factor (R) for different tank configurations and geometry such as for flexible and non-flexible base tanks under seismic loading. The R-values used to date are empirical in nature. The only way to rationalize these factors is by analytical and experimental testing.**The main objective of the proposed research study is to develop a rational design procedure, for concrete tanks that assures a safe leak resistant structure. The concept of water-tightness in liquid containing structures will be investigated. To investigate the seismic induced leakage problem, an experimental study will be conducted on specimens that are representative of full scaled base slab-wall connection portion of circular tanks with different connection details. These specimens while under reversed*cyclic loading will be simultaneously subjected to liquid pressure and leakage tests.*It is also intended to evaluate the performance of CLCS under temperature and shrinkage effect by installing instruments in actual CLCS while under construction. **The analytical study include evaluating the dynamic behavior of both rectangular and circular tanks using a rigorous finite element method capable of including the effect of fluid-structure-soil interaction as well as material non-linearities in a three dimensional domain. It is expected that this research program will provide a framework to understand the behavior of CLCS to meet safety, serviceability, construction, maintenance cost, and design standards. This framework will be useful towards the development of Canadian design guides for CLCS.**

混凝土含液结构（CLCS）广泛用于储存液体和类液体物质，包括水、油、液化天然气、化工流体和不同形式的废物。地面支撑的坦克由于其设计和构造简单，在使用中更为常见。此外，它们提供了更好的抗流体静力和地震载荷。这些结构被视为生命线设施，其功能性能在裂缝和泄漏控制方面具有重要意义。随着储罐数量和尺寸的增加，储罐的重要性和更好地了解其在不同负载条件下的行为的需求也在增加。**加拿大设计标准没有直接涉及CLCS的结构设计，这导致了此类设施设计的不一致。此外，在这一重要的大类结构的设计标准之间存在大量的不一致。这主要是由于缺乏对这些结构在静力和地震载荷下的行为的了解。在这方面，设计工程师对规范和标准中某些条款的有效性存在重大分歧。最具争议的问题之一是不同储罐结构和几何形状（如地震荷载下的柔性和非柔性基础储罐）的响应修正系数(R)的取值。迄今为止使用的r值本质上是经验性的。使这些因素合理化的唯一方法是通过分析和实验测试。**提出的研究的主要目的是制定一个合理的设计程序，为混凝土罐，以确保一个安全的防泄漏结构。将研究含液结构的水密性概念。为了探讨地震诱发渗漏问题，将对具有代表性的圆形储罐底板-墙体全尺寸连接部分进行不同连接方式的试验研究。这些试件在反向循环加载下将同时进行液体压力和泄漏试验。*在施工过程中，通过在实际CLCS中安装仪器来评估CLCS在温度和收缩效应下的性能。**分析研究包括使用严格的有限元方法评估矩形和圆形储罐的动力行为，该方法能够包括流-固-土相互作用以及材料非线性在三维域中的影响。预计该研究计划将提供一个框架，以了解CLCS的行为，以满足安全性、可维护性、建造、维护成本和设计标准。该框架将有助于开发加拿大的CLCS设计指南