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Evaluation of Strength and Ductility of Reinforced Concrete Member

钢筋混凝土构件的强度和延性评价

基本信息

批准号：
08455265
负责人：
ADACHI Hiromi
金额：
$ 4.99万
依托单位：
NIHON UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
1996
资助国家：
日本
起止时间：
1996 至 1998
项目状态：
已结题

项目摘要

1) Brittle fracture behaviors, which characterize the basic properties of concrete, were clarified through the experimental and analytical studies. For investigating microscopic fracture behavior of concrete, the micro-analysis model: so-called the particle model, was developed. Furthermore, the macro-analysis model for RC members, which can simulate not only flexural deformation but also shear deformation, was developed. The inelastic monotonic and cyclic loading analyses on RC members were carried out using this model, and it was found that the present model can simulate fracture behaviors of RC members including shear fracture mode.2) Size effect on strength and deformation capability in RC beam members, which fails in either flexural or shear fracture mode, was rigorously studied. Furthermore, the static and dynamic loading tests were conducted on the ト-shape beam-column joint assemblies under high or fluctuating axial force, which is representative of the side column in high-rise … More buildings. The seismic performance in beam-side column joint was clarified through this experimental study.3) The method predicting elasto-palstic seismic responses for RC buildings equipped with energy-absorbing devices was formulated on the basis of the equilibrium of energies, and the practical design method for calculating a number of frictional dampers needed for the seismic retrofitting. Furthermore, the pseudo-dynamic test on the RC frame system equipped with damper braces and the substructure pseudo-dynamic test on the isolated damper from framed system were conducted, and it was confirmed that seismic responses can be controlled by using dampers in the existing RC buildings.4) The algorithm for evaluating damages in RC buildings suffered from the past earthquake in terms of the maximum deformation and the amount of absorbed hysteresis energy for structural members was developed and its effectiveness was studied through the nonlinear response analysis of plane frame model. Furthermore, effect of eccentrically-equipped energy-absorbing devices in RC buildings on torsional behavior was clarified by using 3-D seismic response analysis method. Less

1)通过试验和分析研究，阐明了表征混凝土基本性能的脆性断裂行为。为了研究混凝土的细观断裂行为，建立了细观分析模型，即颗粒模型。在此基础上，建立了既能模拟受弯变形又能模拟受剪变形的钢筋混凝土构件宏观分析模型。采用该模型对钢筋混凝土构件进行了非弹性单调加载和循环加载分析，结果表明，该模型能够较好地模拟钢筋混凝土构件的剪切断裂行为。2)严格研究了钢筋混凝土梁在受弯和受剪两种破坏模式下，尺寸对构件强度和变形能力的影响。此外，还对具有代表性的高层建筑侧柱的高轴力或波动轴力作用下的φ φ型梁柱节点组合进行了静、动加载试验。通过试验研究，阐明了梁柱节点的抗震性能。3)在能量平衡的基础上，建立了钢筋混凝土吸能结构的弹塑性地震反应预测方法，并给出了计算抗震加固所需摩擦阻尼器数量的实用设计方法。此外，还对加装减振器支撑的钢筋混凝土框架体系进行了拟动力试验，并对框架隔震减振器的子结构进行了拟动力试验，验证了在既有钢筋混凝土建筑中加装减振器可以控制地震反应。4)通过平面框架模型的非线性响应分析，提出了基于结构构件最大变形量和吸收滞回能的钢筋混凝土建筑震害评估算法，并对算法的有效性进行了研究。此外，采用三维地震反应分析方法，阐明了钢筋混凝土建筑物偏心安装吸能装置对扭转性能的影响。少