钢结构用混凝土空腔楼盖受力性能研究

【作者】 廖荣坤；

【导师】 杨建军；

【作者基本信息】 中南大学 ， 土木工程， 2011， 硕士

【摘要】 为了更好地掌握钢结构用空腔楼盖受力变形性能,本文基于钢结构用空腔楼盖足尺试验,通过理论分析和有限元计算,进行了如下研究：根据试验现象,分析了空腔楼盖的破坏形态,确定了空腔楼盖的破坏标志。采用塑性铰线分析方法,对不同连接方式下塑性铰线出现时的荷载进行计算,对比试验结果,确定了空腔楼盖足尺试验的连接方式。建立有限元模型,在混凝土用量相同的情况下,对比分析了钢结构用空腔楼盖、平板无梁楼盖、密肋楼盖的受力和变形性能。通过模型结果的对比分析,对钢结构用空腔楼盖的主要参数,诸如肋梁间距、肋梁高度、钢梁高度、板厚等对楼盖受力性能的影响规律进行了研究。参考已有的工程实例,对上述参数的合理取值范围提出了建议。论述了拟板法、拟夹层板法、拟梁法、查表法等计算空腔楼盖弹性变形的基本过程。将各种方法的计算结果及有限元模型的计算结果进相互对比,分析了各种计算方法的特点及其准确性,推荐了适合空腔楼盖变形的计算方法。更多还原

【Abstract】 In order to investigate the mechanical and deformation behavior of the hollow floor-slab with steel beam more precisely, this paper which is based on a full-scale test was written. Through theoretical analysis and software calculation, research has been done as following.According to the test data and an analysis of the hollow floor-slab’s failure mode, this paper determines the sign of the hollow floor-slab with steel beam’s failure. As well, failure load in various kinds of connection method was calculated by plastic hinged line way. Compared with test result, test’s connection style could be confirmed.Finite element model was built in this paper. Analyze the mode result, when the concrete amount remain unchanged, the hollow floor-slab works better compared to ribbed floor and beamless floor in view of mechanical and deformation behavior. After a comparison of model result and engineering example, this paper analyze the influence of the main member’s size to the mechanical and deformation behavior of the hollow floor-slab with steel beam. the main member’s reasonable value, such as distance of rib beam, height of rib beam, height of steel beam and plate thickness, etc.The elastic calculation of the hollow floor-slab can be classified as simulating plate method, simulating sandwich plate method, simulating beam method, table method, etc. This paper derived basic process of above methods. Through a comparison of model result and theoretical calculation, this paper summarized characteristics and accuracy of above methods. As well, proper methods had been recommended in this paper.更多还原