Do You Know What To Pay Attention To in The Design Of Steel Temporary Bridge

Since the 1990s in the last century, China has gradually paid attention to the scientific research on structural performance indicators, and has also obtained many results. Most of this kind of scientific research is carried out from the perspective of raw materials and big data analysis, but there is very little on how to improve the durability of roads and bridges from the perspective of structure and design and how to formulate and construct personnel to accept and control methods. Some people do research.

1. It should pay more attention to the difficulty of structural durability, and everyone has always been focusing on scientific research in the form of structural measurement and calculation, but has neglected the attention to the overall structure and the handling of small key points. Persistence plan design is fundamentally different from the main overall plan design. At present, we must try to make durability research develop from quantitative research to qualitative research. Analysis and use around the world have shown that structural durability plays a vital role in the safe operation and rationalization of roads and bridges.

2. Attaches great importance to scientific research on fatigue hazards. The daily wind load of the vehicle load responsible for the bridge structure is a load, which will cause a cyclically changed stress field in the structure, which will not only cause the vibration of the structure, but also continue to cause the accumulation of the structure again. Fatigue harm. Because the raw materials used in roads, highways and bridges are not uniform and continuous, there are actually many subtle defects. Under the action of cyclic loading, such micro-defects will gradually develop trends, merge and cause harm, and gradually cause macroeconomics in the materials. Policy cracks. If the macroeconomic policy cracks are not effectively controlled, it is very likely to cause brittle fracture of raw materials and structures. The hazards of fatigue in the early stage are generally not easy to detect, but the negative effects of fatigue are often indelible. Therefore, the research on the hazards of fatigue must be paid enough attention.

3. Pay attention to the difficulty of overweight road bridges. On the one hand, road bridges are prone to fatigue problems. Excessive weight will greatly increase the fatigue stress of roads, highways and bridges, increase the damage, and even cause some safety production accidents caused by excessive weight component damage.

On the other hand, the internal hazards of road and highway bridges caused by excessive weight cannot be repaired, which will promote the transformation of the operation of road and highway bridges under all normal loads, which is likely to damage the safety and durability of road bridges.

In general, the steel structure of roads and bridges should pay attention to certain specifications as much as possible, and select certain designated preventive measures. The main difficulties in the scheme design should be given special attention. Finally, it is necessary to have the overall awareness of the program design to improve the quality of the program design in general.