轻钢-秸秆混凝土组合楼板受力性能研究

发布时间：2018-05-24 21:07

本文选题：秸秆混凝土 + 冷弯薄壁型钢　；参考：《吉林建筑大学》2017年硕士论文

【摘要】：随着我国经济的发展,城市的规模也越来越大,为了推动建筑工业化,装配式建筑得到了迅速发展,组合楼板作为装配式建筑的重要结构形式,相比传统的普通混凝土楼板,具有强度高、施工效率快等优点。而采用秸秆混凝土组合楼板作为一种新型材料的楼板体系,除了具有普通混凝土组合板的特点外,还具有自重轻、保温性能好、经济效益高等优势。目前国内外对组合楼板研究相当成熟,而对于轻钢-秸秆混凝土组合楼板的研究相对较少,还没有相应的明文规范。本文对轻钢-秸秆混凝土组合楼板进行了实验研究和理论分析。主要内容如下:(1)用制配好的秸秆混凝土、冷弯薄壁型钢和光圆钢筋浇筑混凝土楼板,根据楼板中钢筋间距的不同,共浇筑了两块楼板。对轻钢-秸秆混凝土组合楼板进行受弯试验研究,观察其受力过程及破坏特点;并对组合楼板跨中挠度、秸秆混凝土应变、冷弯薄壁型钢应变、钢筋应变进行测定。试验结果表明:两组楼板均为受弯破坏,钢筋配筋率高的楼板所能承受的荷载大。(2)对轻钢-秸秆混凝土组合楼板在竖向荷载作用下的受力性能进行有限元模拟,通过ABAQUS有限元分析,对比分析模拟结果与试验结果,两者吻合较好,验证了有限元模拟的准确性。(3)通过ABAQUS有限元对楼板进行更加全面的模拟,模拟不同钢筋间距、不同楼板厚度、不同冷弯薄壁型钢尺寸、不同冷弯薄壁型钢开孔率对楼板受力性能的影响。结果表明:钢筋间距、楼板厚度、冷弯薄壁型钢尺寸、冷弯薄壁型钢开孔率对组合楼板的承载力、刚度、延性均有影响,但影响的程度不同。
[Abstract]:With the development of China's economy, the scale of the city is becoming more and more large. In order to promote the industrialization of the building, the assembly building has been developed rapidly. As an important structural form of the assembly building, the composite floor has the advantages of high strength and fast construction efficiency compared with the traditional concrete floor. In addition to the characteristics of the common concrete composite plate, a new type of material floor system has the advantages of light weight, good thermal insulation and high economic benefit. At present, the research on composite floor is quite mature at home and abroad, but the research on light steel straw concrete composite floor is relatively less and there is no corresponding standard. The experimental research and theoretical analysis of the light steel straw concrete composite floor slab are carried out. The main contents are as follows: (1) the concrete slabs are poured with the prepared straw concrete, the cold bending thin wall steel and the circular steel bar are poured, and two floors are built according to the difference in the spacing of the steel bars in the floor. The bending test of the light steel straw concrete composite floor is tested. The stress process and damage characteristics are observed, and the deflection of the composite floor, the strain of straw and concrete, the strain of cold bending thin-walled steel and the strain of steel bar are measured. The test results show that the two groups of floors are all flexural, and the slab with high reinforcement ratio can bear large load. (2) the vertical load of the light steel straw concrete composite floor slab is in the vertical load. The force performance under the load is simulated by finite element method. Through ABAQUS finite element analysis, the simulation results and test results are compared and analyzed. The accuracy of the finite element simulation is verified. (3) a more comprehensive simulation of the floor plate is carried out by ABAQUS finite element method, and the distance between different steel bars, different floor thickness, different cold bending thin wall type is simulated. The influence of the steel size, the opening rate of different cold-formed thin-walled steel on the mechanical properties of the slab shows that the spacing of steel bar, the thickness of the slab, the size of the cold-formed thin-walled steel and the opening rate of the cold formed thin-walled steel have influence on the bearing capacity, stiffness and ductility of the composite floor, but the degree of influence is different.
【学位授予单位】：吉林建筑大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU398.9

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