FATIGUE BEHAVIOR OF PRETENSIONED CONCRETE GIRDERS
FATIGUE BEHAVIOR OF PRETENSIONED CONCRETE GIRDERS
复制标题
预应力混凝土梁的疲劳性能
DOI：
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发表时间：
1984
期刊：
影响因子：
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通讯作者：
K. Frank
中科院分区：
文献类型：
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作者：
T. Overman;J. Breen;K. Frank
本文总结了全尺寸预制先张法无底板预制梁的疲劳试验。它包括对预应力混凝土疲劳的广泛文献回顾和与预应力混凝土疲劳相关的设计规范的发展。详细总结了一系列足尺试件的疲劳和极限行为，包括静态和动态载荷、挠度、应力和裂纹测量。主要变量包括最大名义混凝土拉应力水平；梁绞线应力范围；横截面(德克萨斯州C型梁和AAAHTO II型梁)；钢绞线模式(直的和悬垂的)；被动配筋；预裂程度；偶尔超载的存在；以及预应力损失。采用非线性程序对试验结果进行了分析，确定了预应力损失的有效预应力值和有效索应力范围。与其他已报道的试验结果以及推荐的和现有的疲劳设计方法进行了比较。该报告综合了这些信息，并提出了适合纳入一般AASHTO疲劳设计框架的设计建议。(作者)设计框架。(作者)
This report summarizes the fatigue testing of full scale precast pretensioned girderswith unshored cast-in-place slabs. It includes an extensive literature review of prestressed concrete fatigue and development of design specifications relating to fatigue of prestressed concrete. Detailed summaries are given of the fatigue and ultimate behavior of a series of full scale test specimens including static and dynamic loads, deflections, stresses, and crack measurements. The main variables included maximum nominal concrete tensile stress level; girder strand stress ranges; cross sections (both Texas Type C and AAAHTO Type II girders); strand patterns (both straight and draped); passive reinforcement; degree of precracking; presence of occasional overloading; and prestressing losses. A nonlinear program was used in the analysis of experimental results to determine the effective prestressing extent of prestress losses, and the effective strand stress ranges. Comparisons were made to other reported test results and to recommended and existing fatigue design procedures. The report synthesizes this information and presents design recommendations suitable for inclusion within the general AASHTO fatigue design framework. (Author) design framework. (Author)