Dapeng Town Industrial Park, Tongshan District, Xuzhou City, Jiangsu Province, China
The technical requirements of the mechanical performance of steel belt substrate, the technical requirements of galvanized layers and color coatings mainly refer to the current standards of metallurgical enterprise in my country. Comprehensive analysis has not been specifically analyzed for the manufacturing process and durability requirements of the building steel structure. For example, how to reasonably determine the elongation rate according to the requirements of the roller rolling of the roof; how to reasonably determine the T bending indicator according to the requirements of the arched plate lock; how to reasonably determine the type and thickness of the coating and coating according to the durability of the building and the economic requirements, etc., all of which are still to be further studied. The allowable negative deviation value of the thickness of the steel belt depends on the production technical conditions, and directly involves the safety and economy of the building’s structure, which requires special research.
Wind and snow loads are the main loads, especially large semi -span snow loads can easily cause engineering accidents. Therefore, its basic snow pressure should be increased through structural reliability analysis.
In addition, the problem of wind vibration must also be valued. Wind vibration may cause the lock edge to loosen, weaken the rigidity of the structure, and cause overall disability.
In our country, the special computer software that analyzes this structure internal force and displacement according to the non -linear large deflection elastic finite element method has not yet entered the market. Reliable and practical simplified calculation methods are still under further research. Therefore, no specific standards are given in the specifications. At present, the structural thickness and support values of some voltage steel plate arched roof projects in our country are determined by reference to the US ABM manual. This situation must be changed as soon as possible.
The support structure listed in the regulations has been applied in the United States for many years, but there are still experts worrying about its durability. The main reason is that the support structure is generally exposed to the outdoor, which is often soaked by rainwater and is easy to rust. The burial structure in the constructor directly contacts the concrete, which may become a source of local corrosion. Therefore, the branch structure of this structure needs to be conducted in -depth testing.
Simple measuring methods for the thickness of the steel belt substrate material, the system fixed value that allows the deviation deviation of each geometric size in the arched plate production and installation, etc., all need to be determined by research and in -depth investigation and analysis.
