Wind Vibration Reliability Analysis Of Glass Curtain Wall Based On IMA And ISFLA Algorithm

AbstractIn recent years, more and more high-rise building use glass walls as their peripheral structures. Periphery structure has the following advantages, such as beautiful、novel、single materials、simple structure、facilitate construction and maintenance and light weight. Glass curtain by point supported is a new building architecture which has good permeability and flexibility, higher security, and it has certain advantages in modeling, production technology and energy saving, environmental protection, therefore point supported glass curtain wall has been more and more popular. However, the durability and security of the glass curtain in strong winds and heavy rain has been a prominent issue, so it has great significance to study the reliability analysis method under wind loads.Although the conventional reliability methods can solve the problem of reliability calculation, it will be difficult to find a failure path in the course of solving the problem and has difficult in handling large calculate data, and the computational efficiency is relatively low, in order to solve these problems this paper introduces monkey algorithm and leapfrog algorithm in the swarm intelligence algorithm. Then bring in adaptive coefficient to improve the step length and vision length in monkey algorithm to avoid it falling into local optimal algorithm. In the same time we introduce some kind of pheromone with a capacity of memory in improving leapfrog algorithm in order to solve the problem of slow convergence speed and easy to fall into local minimal in the late process of leapfrog algorithm.Finally, to find the key failure path of the glass curtain wall structure by the improved monkeys algorithm, and on this basis, using the improved leapfrog algorithm to solve the structural reliability index.The main work is setting up as follows:(1) Introduces the related concepts of structural reliability analysis and analyses the advantages and disadvantages of the common used methods.(2) Give some related introduction about monkey algorithm and leapfrog algorithm and then improving them for their deficiency in problem-solving.(3) Analyses the characteristics of the normal wind, simplify the point-supported glass curtain wall structural sustain system, set up wind vibration analysis model. After completing these tasks, obtain the response calculate formula of the point-supported curtain wall support structure under the effect of fluctuating wind, and then get their wind load coefficient simplified equation.(4) Using the improved monkey algorithm to find the structural key failure path, then using the improved leapfrog algorithm to calculate the structural reliability index. With the above analysis methods, solve the reliability of point-supported glass curtain under wind loads and finally use an example to prove the effective of the method.This paper introduced the improved monkeys and leapfrog hybrid algorithm into the reliability of wind vibration of point-supported glass curtain wall. It solved the shortcomings of traditional methods in solving the problems. It achieved good effects both on methods in solution efficiency and precision and it has significance to improve the structural reliability research level in our country.