With the promotion of green building concept, light prefabricated building has been vigorously promoted in our country, and the social and market demand has increased year by year, among which the light steel structure is widely used. How to optimize the structure of light steel structure in the construction process?

輕型鋼結構建筑在龍骨結構的布置形式方面具備較為充分的優化空間，在結構節材方面以結構產生的應力小、材料用量少作為優化目標，在受到相同水平荷載或豎向荷載的作用下，優化龍骨布置方式，以新型桁架式布置的龍骨替代常規豎向布置的龍骨，形成新型桁架式龍骨結構體系。

Light steel structure building has sufficient space for optimization in the layout form of keel structure. In the aspect of structural material saving, it takes small stress and less material consumption as the optimization objective. Under the same horizontal or vertical load, it optimizes the layout of keel, and replaces the conventional vertical layout of keel with the new truss layout, forming a new truss Frame type keel structure system.

以桿長與應力的乘積作為結構效率進行判別，對比不同龍骨布置方案的結構效率，得出結構受力性能和節材效果更好的新型龍骨結構布置方案，在綠色建筑推廣的過程中，充分發揮采用該方案的新型桁架式龍骨結構體系的建筑效率，達到減少建筑材料用量，、可持續發展的目的。

Taking the product of rod length and stress as the structural efficiency, the structural efficiency of different keel layout schemes is compared, and a new keel structure layout scheme with better structural mechanical performance and material saving effect is obtained. In the process of green building promotion, the building energy saving efficiency of the new truss keel structure system with this scheme is fully utilized, so as to reduce the consumption of building materials and save energy To achieve the goal of environmental protection and sustainable development.

1.有限元分析

1. Finite element analysis

采用ABAQUS有限元軟件進行分析，以墻體尺寸2.4m×3.0m和4.8m×3.0m為例，在單獨施加水平單位集中荷載、單獨施加豎向單位均布荷載、同時施加水平單位集中荷載和豎向單位均布荷載3種不同條件下，對采取不同龍骨布置方案的結構形式進行有限元分析，分別得出在3種不同荷載條件下采用不同龍骨布置方案的桁架應力分布。

ABAQUS finite element software is used for analysis. Taking the wall size of 2.4m × 3.0m and 4.8m × 3.0m as examples, under three different conditions of applying horizontal unit concentrated load, vertical unit uniform load, horizontal unit concentrated load and vertical unit uniform load at the same time, the finite element analysis is carried out for the structural forms with different keel layout schemes. The results show that under three different conditions, the vertical unit concentrated load and vertical unit uniform load are applied respectively The stress distribution of truss with different keel arrangement schemes under the same load condition.

2.結構效率計算

2. Structural efficiency calculation

在對模型進行大量參數化分析得出數據后進行相應的數據處理。引入“結構效率”的概念，在達到相同結構目的條件下，盡可能減少結構構件數量，從而減少建筑材料用量，達到的綠色建筑要求。通過結構應力小、材料用量少為優化目標，對不同荷載條件、墻體高寬比下輕型鋼結構龍骨結構體系的龍骨布置方案進行計算分析，并對結構節材效果進行量化。

After a large number of parametric analysis of the model, the corresponding data processing is carried out. The concept of "structural efficiency" is introduced. Under the condition of achieving the same structural purpose, the number of structural components is reduced as much as possible, so as to reduce the consumption of building materials and meet the requirements of green building of energy conservation and environmental protection. Through the optimization objective of small structural stress and less material consumption, the keel layout scheme of light steel structure keel structure system under different load conditions and wall height width ratio is calculated and analyzed, and the effect of structural material saving is quantified.