建筑结构

2019, v.49;No.515(23) 70-75+69

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钢骨架膨石轻板静力性能试验研究
Experimental study on static behavior of steel-encased modified perlite concrete slab

李永梅;冯玉沛;彭凌云;王文明;陈智勇;
Li Yongmei;Feng Yupei;Peng Lingyun;Wang Wenming;Chen Zhiyong;Beijing Key Lab of Earthquake Engineering and Structural Retrofit,Beijing University of Technology;Beijing Tianji New Material Co.,Ltd.;

摘要(Abstract):

膨石材料强度较低,普通膨石轻板易发生剪切破坏。为了改善膨石轻板受力性能,设计了配置受压纵筋、加大板厚、钢骨架的8块膨石轻板足尺试件,分析双筋、板厚以及钢骨架对其受力性能的改善效果,研究膨石与钢骨架的协同作用。试验结果表明,双筋与增大板厚对膨石轻板受力性能的改善作用效果远不及钢骨架;钢骨架与膨石的相互约束,显著提高了板的承载力和延性;膨石提高了钢骨架上翼缘的受压局部稳定性,钢骨架使膨石处于三向受压状态,提高了其极限压应变。
Because the strength of modified perlite concrete is low,the shear failure occurs easily for the normal modified perlite concrete slabs. In order to improve the mechanic behavior of modified perlite concrete slab,eight full-scale modified perlite concrete slab specimens were designed with compressive longitudinal steel bars,increased slab thickness and steel encase. It aimed to analyze the improved effect of double steel bars,increased slab thickness and steel encase respectively on mechanic behavior of modified perlite concrete slab. Also cooperative work between modified perlite concrete and steel encase was studied. The experimental results show that the effects of double steel bars and increased slab thickness on improving the mechanical properties of modified perlite concrete slab is far less than that of setting steel encase; the mutual restraint between steel encase and modified perlite concrete significantly improves the bearing capacity and ductility of modified perlite concrete slab; the modified perlite concrete improves the local stability of the upper flange of the steel encase under compression,while the steel encase makes the modified perlite concrete compressed in three directions to improve its ultimate compressive strain.

关键词(KeyWords): 膨石轻板;钢骨架;承载力;局部失稳;延性
modified perlite concrete slab;steel encase;bearing capacity;local stability;ductility

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基金项目(Foundation): 北京市自然科学基金资助项目(8152008)

作者(Author): 李永梅;冯玉沛;彭凌云;王文明;陈智勇;
Li Yongmei;Feng Yupei;Peng Lingyun;Wang Wenming;Chen Zhiyong;Beijing Key Lab of Earthquake Engineering and Structural Retrofit,Beijing University of Technology;Beijing Tianji New Material Co.,Ltd.;

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