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Functional Design of Concrete Structures

混凝土结构的功能设计

基本信息

批准号：
61302058
负责人：
KOYANAGI Wataru
金额：
$ 3.78万
依托单位：
Gifu University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Co-operative Research (A)
财政年份：
1986
资助国家：
日本
起止时间：
1986 至 1987
项目状态：
已结题

项目摘要

In addition to the usual strength design of concrete structures, functional design is strongly needed recently, where various functions of concrete other than strength function are quantitatively evaluated and are taken into account in the structural design. The object of this study is to develop the functional design, especially on the mechanical functions, of concrete structures. Principal conclusions derived are as follows;1. On the toughness design of reinforced and prestressed concrete beams, toughnss index should be appropriate, which is defined by the function of cross sectional and material properties of a beam and the normal force acting on the beam. Concrete beams with high cracking resistance and high strength and toughness were also developed.2. As to the abrasion resistant design of concrete, revolving disk abrasion tes and impact abrasion test by dropping steel balls were made on the concrete of various strength and various toughness, i.e. various amount of steel fibers. … More Effectiveness of strength and fiber content on abrasion resistance was found to be largely dependent on the type of abrasion test and on whether the surface of concrete was dry or wet.3. On the impact resitant design of concrete structures, lavered finite element technique is found to be very useful for analizing the impact failure behavior of reinforced concrete slab structures. Impact failure behavior of concrete wall handrails were also investigated experimentally.4. On the corrosion inhibiting design of cocrete structures, chloride corrosion of reinforcement was mainly studied. The efficiency of various surface treatment agents of concrete was examined from stand points of the diffusibility of oxygen, water, chloride ion etc. within concrete. Reduction of alkali aggregate reactions by blastfurnace slag and flyash was also examined.5. On the fatigue resistant design of concrete structures, the degree of damage caused by cyclic loading was obtained by measuring the changes in vibration characteristics of concrete members. Less

除了通常的混凝土结构强度设计外，最近强烈需要功能设计，其中混凝土的各种功能而不是强度功能被定量评估并在结构设计中被考虑。本研究的目的是发展混凝土结构的功能设计，特别是力学功能设计。主要结论如下：1.在钢筋混凝土梁和预应力混凝土梁的韧性设计中，韧性指标应取合适的值，它是由梁的截面、材料性能和作用在梁上的法向力的函数来确定的。开发了具有高抗裂性和高强度、高韧性的混凝土梁.在混凝土耐磨设计方面，对不同强度、不同韧性的混凝土，即不同钢纤维掺量的混凝土进行了旋转圆盘磨损试验和落球冲击磨损试验。 ...更多信息强度和纤维含量对耐磨性的影响很大程度上取决于磨损试验的类型和混凝土表面是干的还是湿的.在混凝土结构抗冲击设计中，采用分层有限元法分析钢筋混凝土板结构的冲击破坏特性是十分有用的。对混凝土墙扶手的冲击破坏行为进行了试验研究.在混凝土结构的防腐蚀设计中，主要研究了钢筋的氯离子腐蚀。从氧、水、氯离子等在混凝土中的扩散性出发，对混凝土各种表面处理剂的效果进行了检验。研究了高炉矿渣和粉煤灰对碱骨料反应的抑制作用.在混凝土结构的抗疲劳设计中，通过测量混凝土构件振动特性的变化，得到循环荷载作用下混凝土构件的损伤程度。少