钢筋混凝土分体柱框架抗震性能的模型试验研究  

Model experimental study on seismic behavior of reinforced concrete frame with split columns

作　　者：李忠献[1] 郝永昶[1] 周兵[1] 康谷贻[1] 胡庆昌 徐云扉 

机构地区：[1]天津大学建筑工程学院,天津300072 [2]北京市建筑设计研究院,北京100045

出　　处：《建筑结构学报》2003年第6期1-10,31,共11页Journal of Building Structures

基　　金：天津市城乡建设委员会科技发展计划资助项目(96-13)。

摘　　要：本文通过一榀1/3比例的两跨三层现浇钢筋混凝土分体柱框架模型的低周反复荷载试验,研究了分体柱框架模型的破坏机制、出铰顺序、滞回特性、耗能能力等抗震性能;研究了分体柱框架的裂缝发展、分体柱与其他构件的变形协调、内力重分配等工作过程;探讨了分体柱的过渡区、配箍率等主要参数对分体柱框架抗震性能的影响。验证了已有的分体柱及分体柱框架梁柱节点的设计方法和构造要求;研究了分体柱框架强柱弱梁、强剪弱弯以及强节点、强锚固的关系;给出了分体柱轴压比、剪跨比等概念参数的定义。从而得出结论,采用分体柱可以实现变短柱为长柱的设计思想,有效地改善钢筋混凝土短柱、特别是超短柱框架的延性和破坏形态,大幅度地提高钢筋混凝土短柱、特别是超短柱框架的抗震能力,最后给出了相关的设计建议。Based on model experiment on an one third scale, two bay, three story reinforced concrete frame with split columns under cyclic loading, the seismic behavior of the reinforced concrete frame with split columns, including the failure pattern, occurrence order of plastic hinge, hysteresis property and energy dissipation, etc., was investigated systematically in this paper. And the cracking process of the split columns, the deformation compatibility of the split columns with other members of the frame, and the reallocation of internal forces of the frame were studied generally. The influence of major parameters of the split columns, including transition regions, stirrup ratio, etc., on the seismic behavior of the frame was discussed. The existed designing method and the constructional detail of the split columns and the joints of frame were verified by test. The relationship between strong columns and weak beams, major shear and minor flexure, strong joints and strong anchoring of the frame was analyzed. The definitions of parameters of axial compression ratio and shear span ratio of split columns were given. Some conclusions were obtained that by employing the split columns, the design idea of making the short columns to slender columns can be realized, and the ductility and failure shapes of the reinforced concrete frame with short columns can be improved effectively, especially the seismic behavior of the frame. Finally, some design suggestions for the reinforced concrete frame with split columns are proposed.

关 键 词：钢筋混凝土 框架 短柱 分体柱 抗震性能 模型试验 

分 类 号：TU375.4[建筑科学—结构工程]