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INELASTIC RESPONSE OF A MOMENT-RESISTING REINFORCED CONCRETE FRAME BUILDING SUBJECTED TO MULTI-COMPONENT STRONG GROUND MOTIONS

多构件强地震动下抗弯钢筋混凝土框架建筑的非弹性响应

基本信息

批准号：
09650623
负责人：
KUBO Tetsuo
金额：
$ 2.05万
依托单位：
Nagoya Institute of Technology
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1997
资助国家：
日本
起止时间：
1997 至 1999
项目状态：
已结题

项目摘要

Seismic resisting issues on a moment-resisting weak-beam strong-column reinforced concrete building structural system are examined and discussed. An analytical model is employed, and inelastic seismic responses are evaluated.Recently, with the development of high strength concrete and reinforcing steel bars, high-rise reinforced concrete building structures can be well designed with high seismic resisting performance. Within the design, a desirable yielding mechanism is prescribed with which a large amount of energy dissipation can be expected. Yielding hinges are generated at the ends of beam members. Yielding hinges should not be produced at the ends of column members. Columns are designed strong so as plastic hinges should not be generated during an intense seismic action. With this design concept, a certain level of strength should be specified to the moment-resisting frames. Since the amount of frame strength would not be so great not to generating hinges at the ends of constituen … More t beam members within the frame, yielding hinges are produced when the building suffers from an intense seismic action. The issues are of significant when the building is subjected to a multi-component seismic action. Within the frame in both longitudinal and transverse direction, yielding mechanisms would be generated.Within the study presented herein, the following two specific issues are examined : the first is that on the bi-axial moment action on the coltumns when the yielding hinges are generated at both girders and beams, and the second is that a large amount of axial load fluctuation can be expected for the column, especially that placed at the corner of the building, when the yielding hinge mechanism are produced at both frames positioned along the transverse and longitudinal directions.Analytical models are generated representing a 60-story high-rise building. A set of strong motion records are utilized in analysis. The multi-component of strong ground motions are expressed by the so-defined principal components obtained along the principal axes evaluated for ground motion processes. The so-defined bi-axial effect coefficients to yield the column strengrth great are examined through the analytical study in a quantitative manner. Less

对一种抗弯弱梁强柱钢筋混凝土房屋结构体系的抗震问题进行了研究和探讨。近年来，随着高强混凝土和钢筋技术的发展，高层钢筋混凝土建筑结构的抗震性能越来越好。在设计中，规定了一个理想的屈服机制，可以预期大量的能量耗散。屈服铰产生于梁构件的端部。柱构件的端部不应产生屈服铰。柱设计得很坚固，因此在强烈的地震作用下不会产生塑性铰。在这种设计理念下，抗弯框架应具有一定的强度。由于框架的强度不会太大，因此在构件的端部不会产生铰链， ...更多信息当建筑物遭受强烈的地震作用时，框架内的梁构件产生屈服铰。当建筑物受到多分量地震作用时，这些问题是重要的。在纵向和横向框架内，将产生屈服机制。在本文提出的研究中，检查了以下两个具体问题：第一个是当梁和梁都产生屈服铰时，柱上的双向弯矩作用，第二个是柱上的轴力可能会有很大的波动，特别是位于建筑物转角处的框架，在横、纵两个方向上均产生屈服铰机构，建立了一个60层高层建筑的分析模型。分析中使用了一组强震记录。强地震动的多分量表示为沿地震动过程评价的主轴沿着获得的所谓主分量。通过分析研究，定量地检验了使柱强度大的双轴效应系数。少