Research Initiation: An Investigation of the Effect of Steel Fibers on the Vibrational Characteristics of Regular Reinforced and Prestressed Concrete Beams

研究启动：钢纤维对常规钢筋预应力混凝土梁振动特性影响的研究

• 批准号: 8810674
• 负责人: Mehdi Saiidi
• 金额: $ 7万
• 依托单位: Board of Regents, NSHE, obo University of Nevada, Reno
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1988
• 资助国家: 美国
• 起止时间: 1988-06-01 至 1993-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8810674&HistoricalAwards=false
• 关键词: Research; Initiation; Investigation; Effect; Steel

The addition of steel fibers to reinforced concrete beams has been determined to significantly enhance the mechanical properties of the member. However, little research has been reported concerning the effect of steel fibers on the vibrational characteristics of regular reinforced and prestressed concrete flexural members. The objective of this research program is to experimentally determine the influence of adding steel fibers to regular reinforced and prestressed concrete beams on the vibrational properties (frequency and damping) of these structural members. The change in dynamic response as a function of fiber type, volumetric fiber content, regular and prestressing reinforcement ratios and concrete strength will be the parameters of study. The dynamic properties of the flexural test specimens will be assessed from the results of free vibration and forced vibration tests. All specimens will be tested in both simply supported and cantilever beam configurations. The results obtained from this research project will begin to determine if the addition of steel fibers to regular reinforced and prestressed concrete members will result in a significant increase in structural damping.

在钢筋混凝土梁中加入钢纤维， 已确定显著增强的机械性能 成员。 然而，很少有研究报道， 钢纤维对混凝土振动特性的影响 普通钢筋和预应力混凝土受弯构件。 的 本研究计划的目的是通过实验确定 钢纤维对普通钢筋混凝土的影响， 预应力混凝土梁的振动特性（频率 和阻尼）。 动态变化 作为纤维类型，体积纤维含量， 常规配筋率、预应力配筋率和混凝土强度 将是研究的参数。 的动态特性 弯曲测试样本将根据自由测试结果进行评估。 振动和强迫振动试验。 将对所有样本进行检测 在简支和悬臂梁结构中。 的 从这个研究项目获得的结果将开始确定 如果在常规钢筋和预应力中加入钢纤维， 混凝土构件将导致结构的显著增加 阻尼