The influence of quality and performance of color steel plate on the safety of the space frame structure building

Structural Bearing Capacity

1.Self-weight influence

   The quality of color steel plate is directly related to its own weight. If the color steel plate is too heavy and exceeds the carrying range of the design of the space frame structure, it will impose extra load on the space frame structure. For example, in the design of the roof or wall color steel plate is expected to be a certain value of self-weight, and the actual installation of the color steel plate due to the material thickening or insulation material density is too large and other reasons lead to an increase in the weight, which may make the space frame structure of the rods and nodes to withstand the pressure increases. Under long-term action, it may cause deformation and bending of rods, and even lead to node connection failure, thus threatening the stability of the whole building structure.

   On the contrary, the color steel plate with qualified quality, whose self-weight meets the design requirements, can match the carrying capacity of the space frame structure and ensure that the building will not be subject to safety hazards due to additional self-weight load under normal use.

2.Wind load and snow load bearing capacity

   The performance of color steel plate plays a key role in resisting wind load and snow load. High-quality color steel plate has good strength and stiffness, and can resist wind suction and pressure in strong windy weather. For example, in the coastal area or open area of the grid structure building, high quality color steel plate can withstand large wind pressure, will not be easily lifted or damaged. In areas with snow, good performance color steel plate can withstand the weight of snow, avoiding deformation and collapse of roof color steel plate caused by excessive snow load.

   If the quality of color steel plate is poor, such as insufficient strength, when encountering gale, the roof or wall color steel plate may be blown off, causing casualties and property loss; in the case of snow, it may not be able to withstand the weight of snow, so that the space frame structure is locally overstressed and destroyed, which in turn triggers a chain reaction, endangering the safety of the whole building.

Fire Safety

Fireproof performance and fire spread

   The fireproof performance of color steel plate is an important factor that affects the safety of space frame structure building. Different types of color steel plate have different fireproof grade, from ordinary combustible materials to refractory and non-combustible materials. If the fireproof performance of color steel plate is poor, in case of fire, color steel plate will burn easily and the fire will spread rapidly. For example, in the industrial plant and other grid structure building, the interior may store flammable goods, once the fire, burning color steel plate will make the fire range expand, increase the difficulty of extinguishing the fire, at the same time, it will also cause damage to the grid structure.

   The color steel plate with good fireproof performance, such as the color steel plate with flame retardant coating or core material, can prevent the fire from spreading within a certain period of time, and fight for time for personnel evacuation and fire rescue, and it can reduce the damage of the fire to the space frame structure, and reduce the risk of the building structure collapsing due to the fire.

Waterproof Performance

Rainwater leakage and structural damage

   The waterproof performance of color steel plate directly affects the durability and safety of space frame structure building. If the connection between the color steel plate is not well sealed, or the plate itself has cracks, holes and other defects, rainwater will leak into the building. For the space frame structure building, long-term rainwater leakage will make the rods and nodes of the space frame structure damp and rusty, and reduce its strength and stability. For example, the leakage of roof color steel plate may lead to the rusting of purlins of the mesh frame structure, and with the passage of time, the bearing capacity of purlins decreases, which may cause local deformation of the roof or even collapse.

   High-quality color steel plate with good waterproof performance can effectively prevent rainwater leakage, protect the space frame structure from water erosion, and ensure the safety and normal use of the building structure.

Heat Preservation and Insulation Performance and Structural Safety Correlation

The influence of temperature change on structure

   When the heat preservation and insulation performance of color steel plate is not good, the temperature inside the building is easily affected by the external environment. In the case of large temperature changes, the space frame structure will be deformed due to thermal expansion and contraction. For example, in areas with alternating high temperatures in summer and low temperatures in winter, if the color steel plate is not effectively insulated, the length of the rods of the mesh frame structure will expand and contract in response to temperature changes. This kind of repeated expansion and deformation may lead to the loosening of the connection between rods and nodes, and produce the phenomenon of stress concentration, which will weaken the integrality of the structure in the long term and increase the hidden danger of structural safety.

   Color steel plate with good heat preservation and insulation performance can reduce the indoor and outdoor temperature transfer, reduce the deformation amplitude of the space frame structure due to temperature change, and help to maintain the stability and safety of the structure.