Research On The Health Evaluation System Of Large Span Structure

With the development of building technology and the improvement of people's standard of living,more and more long-span buildings appear in people's lives,for example,with the development of high-speed railway,most of the new high-speed rail stations are long span buildings.This brings people a comfortable experience and a new topic for security risk management.All along,the structural safety problems are the focus of research.The aging of the material,the uneven settlement of foundation,the fatigue effect of complex loads and the structure itself,as well as the common role in unpredictable sudden disaster risk factors,make the structure produce different degrees of damage,resulting in less resistance.The existing structure civil buildings from the structural strength,stiffness,boundary conditions and connection evaluation of the safety of the structure.The structural form of large span structures with large span steel structure,the structure has a large span,light weight,large flexibility,small damping structure.In addition,building environment such as temperature,wind,vibration environment.What The existing evaluation system can not fully reflect the structure state.When the reliability of the structure is reduced,if the state of the structure is evaluated in a timely manner,remedial or reinforcement measures should be taken if necessary to prevent the further development of the structural damage from causing safety accidents.This paper is guided by the system theory.On the basis of inheriting the existing achievements and combining the characteristics of long-span buildings,a structural health evaluation system suitable for long-span buildings is constructed.The index system is constructed from five aspects of building safety,stability,applicability,durability and disaster risk.The concrete application of S-high-speed station room is indeed suitable for on-line monitoring.