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: 2020
• 资助国家: 加拿大
• 起止时间: 2020-01-01 至 2021-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=709395
• 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.

混凝土液体容纳结构（CLCS）广泛用于液体和液体状材料的储存，包括水、油、液化天然气、化学流体和不同形式的废物。地面支持的坦克是更常见的使用，因为他们在设计和建设简单。此外，它们还能更好地抵抗流体静力学和地震载荷。这些结构被认为是生命线设施，其裂缝和渗漏控制方面的功能性能具有重要意义。随着储罐数量和尺寸的增加，它们的重要性也在增加，需要更好地了解它们在不同载荷条件下的行为。 加拿大的设计标准并不直接涉及大陆架界限委员会的结构设计，这导致这些设施的设计不一致。此外，对于这一重要的广泛类别的结构，设计标准之间存在很大的不一致性。这主要是由于缺乏对这些结构在静态和地震荷载下的行为的了解。设计工程师对这方面的规范和标准中的一些规定的有效性存在重大分歧。最有争议的问题之一是与不同储罐配置和几何形状（如地震载荷下的柔性和非柔性基础储罐）的响应修正系数（R）所用的值有关。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。 拟议的研究的主要目标是制定一个合理的设计程序，混凝土罐，确保安全的防漏结构。将研究含液体结构的水密性概念。为了研究地震引起的渗漏问题，将对具有不同连接细节的圆形储罐的全尺寸底板-壁连接部分的代表性样本进行实验研究。这些标本虽然在颠倒 循环加载将同时经受液体压力和泄漏测试。 通过在实际施工的CLCS中安装测试仪器，对CLCS在温度和收缩作用下的性能进行评估。 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态行为，该方法能够包括流体-结构-土壤相互作用的影响以及三维域中的材料非线性。 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、可用性、施工、维护成本和设计标准。这一框架将有助于为大陆架界限委员会制定加拿大设计指南。