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Effect of Fill Materials and their Filling Method on Strength and Ductility of Filled Steel Tubes

填充材料及其填充方法对填充钢管强度和延展性的影响

基本信息

批准号：
10650462
负责人：
SUGIURA Kunitomo
金额：
$ 2.24万
依托单位：
KYOTO UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1998
资助国家：
日本
起止时间：
1998 至 1999
项目状态：
已结题

项目摘要

Despite enormous efforts devoted to the evolvement of concrete filled steel(CFTs), the ordinary cement concrete used in filling the steel tube has certain drawbacks or limitations that are not mitigated by the encasing steel tube (e. g. low tensile and bond strengths, low durability, high shrinkage, high density and high reactivity), thus presenting a hindrance to the diverse application of CFTs. Further, cement concrete is not amenable to specific requirements of construction e. g. in retrofitting of steel tubular columns where high increase in ductility combined with low increase in strength, as well as low density are needed cement concrete is not applicable. Even for the currently used ordinary cement concrete filled steel tubular members(CFT)extensive data-base is still required since wide discrepancies exist between the design codes that have been proposed by different countries or institutions.The main objective was to experimentally and analytically study the structural response of filled steel tubular members, filled with polymers and polymer-based materials of varied properties and subjected to several forms of loading. Polymers or polymer-based materials are attracting increased attention in the construction industry due to the supplementary and/or complementary properties to concrete that they posses viz higher compressive, tensile and adhesive strengths, lower weight and shrinkage, high ductility and resilience, and resistance to physical and chemical attack. The study investigated the compressive and flexural behaviors of several types of filled steel stub columns and beams, interface interaction between the steel tube and fill material, effects of simulated multi-directional loads on steel columns and cyclic behavior of filled steel tubular columns.

尽管人们为钢管混凝土（CFT）的发展付出了巨大的努力，但用于填充钢管的普通水泥混凝土具有某些不能通过包裹钢管来缓解的缺点或限制（例如低拉伸强度和粘结强度、低耐久性、高收缩、高密度和高反应性），从而阻碍了CFT的多样化应用。此外，水泥混凝土不符合建筑的具体要求，例如。 g。在钢管柱改造中，需要高延性增加、低强度增加以及低密度，水泥混凝土不适用。即使对于目前使用的普通水泥混凝土钢管构件（CFT），由于不同国家或机构提出的设计规范之间存在很大差异，仍然需要广泛的数据库。主要目的是通过实验和分析研究钢管构件填充不同性能的聚合物和聚合物基材料并承受多种形式的荷载的结构响应。聚合物或聚合物基材料在建筑行业中越来越受到关注，因为它们具有对混凝土的补充和/或互补特性，即更高的压缩、拉伸和粘合强度、更低的重量和收缩、高延展性和弹性以及抗物理和化学侵蚀性。该研究调查了几种类型的填充钢短柱和梁的压缩和弯曲行为、钢管与填充材料之间的界面相互作用、模拟多向载荷对钢柱的影响以及填充钢管柱的循环行为。