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

对抗弯弱梁-强柱钢筋混凝土建筑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的发展，高层钢筋混凝土建筑结构可以很好地设计出具有较高抗震性能的结构。在设计中，规定了一种理想的屈服机制，通过该机制可以预期大量的能量消耗。屈服铰链在梁构件的端部生成。柱构件的端部不应产生屈服铰链。柱子设计坚固，在强烈的地震作用下不应产生塑性铰链。在这种设计理念下，抗弯框架应规定一定的强度水平。由于框架的强度不会很大，因此不会在Consien…的末端产生铰链当建筑物受到强烈地震作用时，框架内会产生更多的T梁构件，产生屈服铰。当建筑物受到多分量地震作用时，这些问题非常重要。在框架的纵向和横向上，都会产生屈服机构。在本文的研究中，研究了以下两个具体问题：第一，当梁和梁上都产生屈服铰时，对柱子的双向弯矩作用；第二，当横向和纵向上的两个框架都产生屈服铰机构时，柱的轴向荷载会有很大的波动，尤其是放置在建筑物角部的柱。分析中使用了一组强震记录。强地震动的多分量由沿着评估地震动过程的主轴获得的所定义的主分量来表示。通过分析研究，定量地检验了所定义的产生较大柱强度的双轴效应系数。较少

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