新成立以來，我國鋼材產(chǎn)量長期偏低，必須限制鋼材的使用，近年來，雖然建設(shè)部開始重視建筑樓承板，但傳統(tǒng)的實(shí)力是不容易改變的，在建筑技能的培養(yǎng)方面，教育制度設(shè)施和建筑規(guī)則已經(jīng)落后，現(xiàn)行的建筑設(shè)計(jì)、施工技術(shù)和管理知識(shí)結(jié)構(gòu)已經(jīng)不能適應(yīng)建筑工地的發(fā)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、鋼構(gòu)建筑需求很多專業(yè)配套材料的供應(yīng)，如強(qiáng)面板，螺栓等等。這些在我國雖然已有生產(chǎn)，但其產(chǎn)業(yè)仍不成熟，在某種程度上，制約了樓承板建筑的發(fā)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、在壓力作用下，鋼管和混凝土之間產(chǎn)生相互作用的緊箍力，使混凝土處于三向受壓的應(yīng)力狀態(tài)下工作，大大提高了混凝土抗壓強(qiáng)度，改善了塑性，提高了抗震性能，而薄鋼管在混凝土擠壓下不易屈曲，提高了鋼管局部穩(wěn)定性，使鋼材強(qiáng)度得到充分發(fā)揮。據(jù)試驗(yàn)研究，鋼管混凝土強(qiáng)度比單鋼管或同樣截面混凝土強(qiáng)度提高了好幾倍。

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、新的樓承板規(guī)范中，反映了多年以來的研究成果，這些成果也是當(dāng)前工程設(shè)計(jì)中經(jīng)常遇到的問題，例如，鋼管結(jié)構(gòu)的桿件和節(jié)點(diǎn)承載力、增加了空間圓管節(jié)點(diǎn)強(qiáng)度計(jì)算公式和矩形管或方管結(jié)構(gòu)設(shè)計(jì)計(jì)算方法，以及一些構(gòu)造規(guī)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、鋼與混凝土組合梁，增加了連續(xù)組合梁負(fù)彎矩部位的計(jì)算方法，樓承板為壓型組合板的組合梁計(jì)算和構(gòu)造特點(diǎn)，以及部分抗剪連接的組合梁的設(shè)計(jì)規(guī)定。在構(gòu)造要求中增加了大跨度屋蓋結(jié)構(gòu)的設(shè)計(jì)和構(gòu)造要求，增加了提高寒冷地區(qū)抗脆斷能力要求等。這些新規(guī)定是改進(jìn)計(jì)算方法的一個(gè)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.