新成立以来，我国钢材产量长期偏低，必须限制钢材的使用，近年来，虽然建设部开始重视建筑楼承板，但传统的实力是不容易改变的，在建筑技能的培养方面，教育制度设施和建筑规则已经落后，现行的建筑设计、施工技术和管理知识结构已经不能适应建筑工地的发展。

Since the founding of new China, China's steel output has been low for a long time, so the use of steel must be restricted. In recent years, although the Ministry of construction has begun to pay attention to building bearing plate, the traditional strength is not easy to change. In terms of building skills training, the education system, facilities and building rules have been backward Construction technology and management knowledge structure can not adapt to the development of construction site.

1、钢构建筑需求很多专业配套材料的供应，如强面板，螺栓等等。这些在我国虽然已有生产，但其产业仍不成熟，在某种程度上，制约了楼承板建筑的发展。

1. Steel construction needs a lot of professional supporting materials supply, such as strong panel, bolts and so on. Although these have been produced in our country, the industry is still immature, to some extent, restricting the development of floor slab building.

   
   

2、在压力作用下，钢管和混凝土之间产生相互作用的紧箍力，使混凝土处于三向受压的应力状态下工作，大大提高了混凝土抗压强度，改善了塑性，提高了抗震性能，而薄钢管在混凝土挤压下不易屈曲，提高了钢管局部稳定性，使钢材强度得到充分发挥。据试验研究，钢管混凝土强度比单钢管或同样截面混凝土强度提高了好几倍。

2. Under the pressure, the hoop force between steel tube and concrete is generated, which makes the concrete work in the stress state of three-dimensional compression, greatly improves the compressive strength of concrete, improves the plasticity, and improves the seismic performance, while the thin steel tube is not easy to buckle under the compression of concrete, improves the local stability of steel tube, and makes the steel strength fully play. According to the experimental research, the strength of CFST is several times higher than that of single steel tube or concrete with the same section.

3、新的楼承板规范中，反映了多年以来的研究成果，这些成果也是当前工程设计中经常遇到的问题，例如，钢管结构的杆件和节点承载力、增加了空间圆管节点强度计算公式和矩形管或方管结构设计计算方法，以及一些构造规定。

3. The new code of floor bearing plate reflects the research results over the years, which are also the problems often encountered in the current engineering design, such as the bearing capacity of members and joints of steel tube structure, the addition of strength calculation formula of spatial circular tubular joints, the design calculation method of rectangular or square tube structure, and some structural regulations.

4、钢与混凝土组合梁，增加了连续组合梁负弯矩部位的计算方法，楼承板为压型组合板的组合梁计算和构造特点，以及部分抗剪连接的组合梁的设计规定。在构造要求中增加了大跨度屋盖结构的设计和构造要求，增加了提高寒冷地区抗脆断能力要求等。这些新规定是改进计算方法的一个重要方面。

4. For steel and concrete composite beams, the calculation method of negative moment position of continuous composite beams is added, the calculation and structural characteristics of composite beams with profiled floor bearing plates, and the design regulations of some composite beams with shear connection are also added. In the construction requirements, the design and construction requirements of large-span roof structure are added, and the requirements of improving the brittle fracture resistance in cold regions are added. These new regulations are an important aspect of improving the calculation method.