Disadvantages of quality problems in steel structure engineering
(1) Complexity
The complexity of the construction quality problems of steel structure engineering projects is mainly manifested in the many factors that cause quality problems, and the causes of quality problems are also complicated. Even the quality problems of the same nature are sometimes different, so the analysis and judgment of quality problems And processing adds complexity. For example, welding cracks can occur either in the weld metal or in the thermal influence of the base metal, either on the weld surface or inside the weld; the crack direction can be parallel to the weld bead or vertical In the weld bead, the crack may be either a cold crack or a hot crack; the cause may also be improper selection of the welding material and improper soldering or post-heating.
(2) Severity
The seriousness of the construction quality problems of steel structure engineering projects is: in general, affecting the smooth progress of construction, resulting in delays in construction period, increased costs, serious, collapse of buildings, resulting in personal injury and death, property damage, causing adverse social impact.
(3) Variability
The quality problems of steel structure engineering construction will continue to evolve and change with the changes of the external environment and time, and the quality defects will gradually manifest. For example, due to the change of stress, the weld of the steel member causes cracks in the weld without the crack: the delayed crack can be generated due to the action of hydrogen in the weld after welding. In addition, if the component is subjected to overload for a long time, the steel member is subjected to bending deformation of the lower arch, which causes a hidden danger.
(4) Frequent
Since modern buildings in China are mainly made of concrete structures, the construction and construction techniques of steel structures are relatively unfamiliar to the management and technical personnel engaged in construction. The specific construction workers mainly based on migrant workers do not understand the scientific construction of steel structure engineering. The method causes accidents during construction to occur frequently.
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