大跨度固接钢-混凝土组合楼盖关键技术分析

发布时间：2018-01-05 01:19

本文关键词：大跨度固接钢-混凝土组合楼盖关键技术分析　出处：《建筑结构学报》2015年S1期 　论文类型：期刊论文

【摘要】：固接钢-混凝土组合楼盖相比于传统混凝土楼盖、纯钢结构楼盖及铰接组合楼盖具有跨度大、结构高度小、用钢量少、受力性能好、整体性强等优势。目前,限制大跨度固接组合楼盖推广应用的主要问题是缺乏完善的实用分析计算与设计方法。以某高层建筑综合体底层大跨度结构为实际工程背景,基于内力计算、组合梁截面设计、舒适度验算以及节点设计等方面,研究大跨度固接组合楼盖的实用分析计算与设计方法。研究结果表明:大跨度固接组合楼盖的舒适度验算应采用基于动力响应法的评价标准,主梁梁端的负弯矩区截面的长度约为0.2倍梁长;考虑地震作用组合工况,对主梁负弯矩设计值影响不显著,大跨度固接主梁的内力计算在设计时可以仅考虑竖向静载工况作用。
[Abstract]:Fixed steel concrete composite slab compared to traditional concrete floor, pure steel structure floor and hinged composite floor has a large span structure, small height, less steel consumption, good mechanical performance, strong integrity and other advantages. At present, limit span is fixedly connected with the popularization and application of composite floor the main problem is the lack of practical analysis the calculation and design method of improvement. In a high-rise complex building bottom large-span structure for practical engineering background, based on internal force calculation, beam design, comfort and check node design, practical analysis calculation and design method of the long-span fixed combination floor. The results show that the long-span fixed combination floor comfort checking should adopt the standards of legal evaluation of dynamic response based on the beam end section of negative moment area is about 0.2 times the length of beam length; seismic load combinations, on the main beam negative moment The effect of the design value is not significant. The internal force calculation of the long span fixed beam can only consider the vertical static load condition in the design.

【作者单位】：清华大学土木工程安全与耐久教育部重点实验室;
【基金】：国家科技支撑计划(2011BAJ09B01) 国家自然科学基金项目(51378291)
【分类号】：TU398.9
【正文快照】： 1工程概况钢-混凝土组合楼盖由钢梁、混凝土楼板以及两者之间的抗剪连接件组成。相比于传统的混凝土楼盖,钢-混凝土组合楼盖具有跨度更大、质量更轻、结构高度更小的优势;与不考虑楼板组合作用的纯钢结构楼盖相比,该楼盖可以节省用钢量、降低结构高度[1-7]。因此,钢-混凝土组

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