Dapeng Town Industrial Park, Tongshan District, Xuzhou City, Jiangsu Province, China
The reliability of the Space Frame refers to the completion of the scheduled safety, safety, and maintenance of the sapce frame within the specified time (design base period, generally 50 years) and under specified conditions (normal design, normal construction, normal use and normal maintenance). Capability of functions such as applicability and durability.
Obviously, the space frame has safety, applicability and durability, which means that the space frame has reliability; therefore, it can also be said that the space frame reliability is a general term about the safety, applicability and durability of the space frame. The index used to measure the reliability of the space frame is called reliability. It is a quantitative description of reliability, and it indicates the degree of reliability. The index used to measure safety is called the degree of safety. Reliability has a broader meaning than safety, but safety is the most important content of reliability.
Because there are uncertainties in various factors affecting reliability, such as variations in load and material properties, imperfect calculation models, differences in manufacturing and installation quality, etc., and these factors are random, it is more scientific to measure reliability The method is expressed by probability.
Reliability refers to the probability of a space frame to complete a predetermined function within a specified time and under specified conditions. It is a probability measure of the reliability of the space frame. The probability that the space frame can complete the predetermined function is called the reliability probability (p.), on the contrary, the probability that the space frame can not complete the predetermined function is called the failure probability (pf), and the two are complementary, namely p. +pf=1.
In the space frame design, in addition to meeting reliability requirements, economy must also be considered. There are often contradictions between the two. The basic problem to be solved by the space frame design is to choose a reasonable balance between the reliability and economy of the space frame, and strive to use the most economical way to make the designed space frame have proper reliability. Appropriate reliability to meet various predetermined functional requirements.
From the point of view of probability, the safety and reliability of the space frame cannot be absolute, that is, it cannot be 100%, and there is always risk. But as long as the failure probability of the space frame is small enough to be acceptable to people, the space frame design can be considered reliable. The calculation method based on this knowledge is called the probability method.
