【作者】 尹犟；

【导师】 陈浩军；

【作者基本信息】 长沙理工大学 ， 结构工程， 2004， 硕士

【摘要】 随着我国国民经济的不断发展,人们对房屋的建设提出了更高的要求,要求经济合理,结构性能好,施工周期短,并有利于环保。而钢结构建筑能比较好地满足上述要求。 多高层钢结构框架是钢结构建筑当中一种最常见的结构形式,通常这种结构形式以钢梁、钢柱作为骨架,以压型钢板-普通混凝土组合楼板作为楼板。与这种较为常见的楼板体系相比,压型钢板-轻集料混凝土组合楼板拥有许多其无法比拟的特点。 目前国内外对压型钢板-普通混凝土组合楼板的研究已日趋成熟,然而,在我国关于压型钢板-轻集料混凝土组合楼板的研究却很少,只有原冶会部建筑研究所作过少量的构件试验工作,无法建立起针对这类构件的设计理论和设计方法。尽管国外的规范当中已经有压型钢板-轻集料混凝土组合楼板的相关条款。但是由于各国的轻集料材料性质有所不同,因此不能直接引用。 鉴于压型钢板-轻集料混凝土组合楼板具有广泛的应用前景,而我国在这方面研究又比较缺乏,本文对这种新型结构型式进行了较全面的试验研究和理论分析。 首先,本文作者采用页岩陶粒对结构用轻集料混凝土的各项物理、力学性能进行试验研究。分析了集料性质、水泥用量、净用水量、水灰比及砂率等因素对轻集料混凝土的影响,并成功配置出坍落度满足现浇要求、干表观密度为1800kg/m~3左右的CL30-CL40结构用轻集料混凝土。 本文作者对四块压型钢板-轻集料混凝土组合楼板进行了荷载试验。建立了组合楼板中压型钢板和轻集料混凝土之间粘结-滑移本构关系;推导出考虑滑移后的挠度计算公式;提出压型钢板-轻集料混凝土组合楼板的承载能力计算公式;探讨了连续跨压型钢板-轻集料混凝土组合楼板的弯矩调幅系数。研究表明,根据本文理论计算的结果和试验结果在正常使用阶段吻合良好。 最后,作者提出结论和展望。更多还原

【Abstract】 Along with the development in the economy, Chinese People advance the higher demand to the building industry. They hope that the building would be more economical, the mechanical property would be more excellent, the construction period would be shorter, in the mean time, the construction process would be satisfied with the requirement of the environmental reservation.Multi-story steel framework is the most usual structural form used in the steel building. Generally, the framework of this kind of structure is composed of the steel columns and steel beams, which are paved with the composite slabs with the profiled sheeting. Compared with this traditional floor system, the cold-formed steel deck and lightweight aggregate concrete composite slabs have lots of advantages, which could not be surpassed by the traditional composite slabs.By far, there are plenty of the researches about the mechanical properties of traditional composite slabs. However, few of them have been concerned with the light-weigh aggregate concrete composite slabs. Only the architectural research institute belonging to the Chinese metallurgy bureau has carried out a few of specimen experiments. Based on such limited research, the general design rules for this kind of composite slabs could not be set down. Although some foreign countries have already regulated the rules specially concerned with the LWAC composite slabs in their design code, many mechanical properties of the LWAC, for instance, the Young’s modulus (E), the characteristic strength of concrete (f_cu) are quite different from country to country. Therefore, the design rules could not be duplicated and transplanted from there directly.While the cold-formed steel deck and LWAC composite slabs certainly will soon have the wide application in china, the research work in this field is extraordinarily deficient by far. Due to the reason mentioned above, this paper concentrates it’s research topic on the experimental and theoretical study of the mechanical properties about the LWAC composite slabs.In the first place, the material proportional tests are done to discuss the physical and mechanical properties of the lightweight aggregate concrete. Many factors, such as the physical characteristics of the lightweight aggregate, the content of cement and sand, the ratio of water to cement (w/c) are discussed to analyze their influence on the material更多还原