现浇柱预制梁混凝土框架结构抗震性能试验研究

发布时间：2018-07-02 07:52

本文选题：现浇柱预制梁框架 + 拟静力试验　；参考：《建筑结构学报》2015年01期

【摘要】：为研究装配整体式混凝土框架结构的滞回性能、延性和耗能能力等抗震性能,并考察其在罕遇地震作用下进入弹塑性阶段的受力性能,进行了2个1/2比例的2层2跨现浇柱预制梁框架试件的低周反复荷载试验。2个试件分别为对比装配式框架试件和预制梁端底部钢筋带套管的框架试件,试验中结构的最大层间位移角达到1/25。试验结果表明:现浇柱预制梁框架结构具有稳定的滞回性能及良好的延性;整个试验过程中结构刚度退化明显,且刚度退化主要发生在屈服之前;梁端钢筋的套管很好地发挥了作用,套管将接缝处钢筋变形平均到套管中,增大了梁端塑性铰长度,进而提高了结构的变形能力。研究成果可为装配整体式混凝土框架在抗震设防区的推广和应用提供参考。
[Abstract]:In order to study the hysteretic behavior, ductility and energy dissipation capacity of the whole concrete frame structure, and to investigate the mechanical behavior of the concrete frame structure in the elastic-plastic stage under the rare earthquake, the hysteretic behavior, ductility and energy dissipation capacity of the concrete frame structure are studied. In this paper, the low cycle cyclic loading tests of two 1 / 2 scale 2 story 2 span cast-in-place column prefabricated beam frame specimens are carried out. The two specimens are respectively fabricated frame specimens and frame specimens with casing at the bottom of prefabricated beams. The maximum interstory displacement angle of the structure is as high as 1 / 25. The experimental results show that the precast beam frame structure with cast-in-situ columns has stable hysteretic performance and good ductility, and the stiffness degradation occurs mainly before yield during the whole testing process. The casing of the beam-end steel bar plays a good role, the casing will average the deformation of the steel bar in the joint to the casing, increase the length of the plastic hinge at the end of the beam, and then improve the deformation ability of the structure. The research results can provide a reference for the popularization and application of assembled integral concrete frame in seismic fortification area.
【作者单位】：湖南大学土木工程学院;
【基金】：国家自然科学基金项目(51478174,51338004) 中央高校科研业务费资助项目(2014HNDX)
【分类号】：TU375.4;TU352.11

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