The content is as follows:
La is the minimum anchorage length of the tension steel bar.
LAE is the seismic anchorage length of the tension steel bar.
Ll is the length of the longitudinal tensile steel bar binding overlap.
Lle is the length of the longitudinal tensile steel bar binding overlap under earthquake resistance.
Domestic traditional design methods are inefficient and difficult to control quality. Japanese structural drawings do not have detailed node structure drawings. The detailed node structure drawings are re-designed by the construction company (construction unit), so the design efficiency is high and the quality is guaranteed. Structural design in the United States only provides the reinforcement area, and the specific reinforcement method is determined by the construction company. Accordingly, traditional Chinese design methods must also be reformed.
In September 1991, the level method began to be used in engineering projects in Shandong, and the level method began to be promoted. Structural diagrams are suitable for all components. They are all included in one diagram. It is very convenient to look wherever you go. After the introduction of Pingfa, there were three types of people: those who firmly supported it, those who firmly opposed it, and those who did not express their stance. Later, they contributed the patent to the country and became a national standard.
The flat method is for professionals engaged in structural design and construction. It improves the scientific and technological content and prevents non-professionals from understanding it. The reform of the design method also promotes the improvement of the technical personnel of the construction unit. The flat method is a revolution in the field of structural design. It can increase efficiency by more than twice and can improve the unreasonable staffing situation in China's structural industry. There is one structural engineer for every three architects.