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.

含有混凝土液体的结构（CLC）广泛用于储存液体和液体样材料，包括水，油，液化天然气，化学液和不同形式的废物。地面支撑坦克在使用中更为常见，因为它们在设计和构造方面具有简单性。此外，它们提供了更好的抵抗力对静静力和地震负荷。这些结构被视为生命线设施，其功能性能在裂纹和泄漏控制方面具有重要意义。随着多年来储罐的数量和大小的增加，它们的重要性和在不同的负载条件下的行为有必要。 加拿大设计标准并未直接解决CLC的结构设计，这导致了此类设施的设计不一致。此外，对于这种重要的广泛结构，设计标准之间存在很大的不一致。这主要是由于缺乏对静态和地震载荷下这些结构的行为的理解。在这方面，设计工程师之间在代码和标准中某些规定的有效性存在很大的分歧。最具争议的问题之一与用于不同储罐配置和几何形状的响应修饰因子（R）的值有关，例如在地震载荷下的柔性和非弹性基础储罐。迄今为止使用的R值本质上是经验的。合理化这些因素的唯一方法是分析和实验测试。 拟议的研究研究的主要目的是制定一个合理的设计程序，以确保安全耐泄漏结构的混凝土储罐。将研究含有结构的液体中的水密度的概念。为了研究地震诱导的泄漏问题，将对代表具有不同连接细节的圆形储罐的全尺度基平板壁连接部分进行实验研究。这些标本在反转时 循环负荷将同时进行液压和泄漏测试。 它还旨在通过在施工时在实际CLC中安装仪器来评估CLC在温度和收缩效果下的性能。 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态行为，该方法能够包括三维结构域中流体结构 - 土壤相互作用以及材料非线性的影响。 预计该研究计划将提供一个框架，以了解CLC的行为，以满足安全性，可维护性，建筑，维护成本和设计标准。该框架将有助于开发CLC的加拿大设计指南。