Influence Analysis of Opening Spacing on Fluctuating Wind-induced Responses of Road Noise Barriers
Based on Davenport spectrum and Shinozuka harmonic synthesis method,the natural random fluctuating wind field with wind speed of 30m/s was simulated,and the fluctuating wind load on the structure surface was obtained.Eight kinds of finite element models of sound barrier with top opening spacing were established,and their modal,displacement and stress wind-induced vibration responses were studied.The results show that:①the natural frequency of the sound barrier structure with the same order decreases with the increase of the opening spacing L.②The peak value of vertical displace-ment and maximum stress of the sound barrier increase with the increase of the top opening distance L,which appear at the entrance and exit of the sound barrier 6.Om and the connection position of the main beam at the top of the side column respectively.③When the opening distance 1 exceeds 8.0 m,the wind-induced displacement and stress response of the sound barrier increase rapidly,so it is sug-gested to control the opening distance at the top of the closed sound barrier within 1/6 of the total span.
万方数据
维普
