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?

轻型钢结构建筑在龙骨结构的布置形式方面具备较为充分的优化空间，在结构节材方面以结构产生的应力小、材料用量少作为优化目标，在受到相同水平荷载或竖向荷载的作用下，优化龙骨布置方式，以新型桁架式布置的龙骨替代常规竖向布置的龙骨，形成新型桁架式龙骨结构体系。

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.

以杆长与应力的乘积作为结构效率进行判别，对比不同龙骨布置方案的结构效率，得出结构受力性能和节材效果更好的新型龙骨结构布置方案，在绿色建筑推广的过程中，充分发挥采用该方案的新型桁架式龙骨结构体系的建筑效率，达到减少建筑材料用量，、可持续发展的目的。

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有限元软件进行分析，以墙体尺寸2.4m×3.0m和4.8m×3.0m为例，在单独施加水平单位集中荷载、单独施加竖向单位均布荷载、同时施加水平单位集中荷载和竖向单位均布荷载3种不同条件下，对采取不同龙骨布置方案的结构形式进行有限元分析，分别得出在3种不同荷载条件下采用不同龙骨布置方案的桁架应力分布。

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.结构效率计算

2. Structural efficiency calculation

在对模型进行大量参数化分析得出数据后进行相应的数据处理。引入“结构效率”的概念，在达到相同结构目的条件下，尽可能减少结构构件数量，从而减少建筑材料用量，达到的绿色建筑要求。通过结构应力小、材料用量少为优化目标，对不同荷载条件、墙体高宽比下轻型钢结构龙骨结构体系的龙骨布置方案进行计算分析，并对结构节材效果进行量化。

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.