地铁沿线砖混结构房屋喷射GFRP的减振研究

Study on Reducing Vibration of Brick Masonry Structure Buildings Around Subway by Spraying GFRP

为改善地铁周边振动环境和提高人们的生活环境质量,对砌体墙喷射玻璃纤维聚合物(GFRP)进行了试验研究和数值模拟。结果表明,喷射GFRP可以提高开裂荷载、极限荷载、极限位移和延性等,其中砌体墙弹性阶段刚度有明显提高,同时建立了砖混结构房屋外墙喷射GFRP的有限元模型,并分析了在列车荷载作用下的动力响应。结果表明:最大Z振级减小量可达2.694dB,具有良好的减振效果,是一种合理有效的减振措施。

To improve the surrounding vibration environment and improve the people＇s living quality,the subject researches the masonry wall by spraying glass fiber reinforced polymer（GFRP） based on experiments and numerical simulations.It shows that this can enhance cracking load,ultimate load,ultimate displacement,tractility and so on.The stiffness of masonry wall can obviously enhance during the elastic stage.Then,the finite element model of brick masonry structure buildings which external wall is sprayed GFRP is established and the dynamic response under the train loads is analyzed.The result shows that the maximum Z vibration level can reduce 2.694 dB.This is a reasonable and effective reducing vibration measure.