道路交通振动对开封城墙的影响  

Influence of Traffic Vibration on Kaifeng Ancient Wall

作　　者：袁玉卿[1,2] 张弦[1,2] 樊兴伟 YUAN Yuqing;ZHANG Xian;FAN Xingwei(Kaifeng Research Center for Engineering Repair and Material Recycle,Henan University,Kaifeng 475004,Henan,China;School of Civil Engineering and Architecture,Henan University,Kaifeng 475004,Henan,China)

机构地区：[1]河南大学开封市工程修复与材料循环工程技术研究中心,河南开封475004 [2]河南大学土木建筑学院,河南开封475004

出　　处：《噪声与振动控制》2022年第6期192-197,246,共7页Noise and Vibration Control

基　　金：河南省高等学校重点科研资助项目(20A580001);开封市科技攻关计划资助项目(2003007);河南大学研究生教育创新与质量提升计划资助项目(SYL19040120);河南省科技攻关计划资助项目(162102210026)。

摘　　要：为评估道路车辆产生的随机振动荷载对开封古城墙的影响,进行现场监测,建立道路-地基土体-城墙三维有限元模型,研究不同工况条件下城墙的振动响应规律,提出古城墙与道路之间的安全距离。结果表明:大型车引发的城墙振动响应幅值较大,城墙的振动以南北方向为主,振动速度最高达到0.15 mm/s。各个拾振点的速度变化趋势基本一致,振源距城墙越远,城墙顶端的速度峰值和加速度峰值越小,南北方向的振动速度值衰减率达66.67%。随着车速的增加,同一拾振点的速度峰值和加速度峰值均增加,位移峰值相应减小。车速相同时,不同振源作用下的各向速度峰值、位移峰值和加速度峰值均随着与振源距离的增加而减小。综合考虑,将道路设置在距城墙20 m以外时,城墙相对安全。To evaluate the influence of random vibration load generated by road traffic vehicles on Kaifeng ancient city wall,a series of field monitors were carried out,and a three-dimensional finite element model of pavement,foundation soil and city wall was established.The vibration response laws of the city wall under different working conditions were studied.On this basis,the safe distance between the ancient city wall and the road was put forward.The results show that the heavy vehicles lead to larger vibration response amplitude of the city wall.And the city wall vibrates mainly in the north-south orientation with a maximum velocity of 0.15 mm/s.The velocity variation trend at all vibration picking points are basically consistent.The farther the vibration source is away from the city wall,the smaller the velocity peak and acceleration peak at the top of the city wall.And the attenuation rate of vibration velocity in the north-south orientation reaches 66.67 %.With the increase of the vehicle speed,the peak values of velocity and acceleration on the same picking point increase,but the displacement peak value decreases correspondingly.For the same velocity,the peak values of velocity,displacement and acceleration in different vibration source positions decrease with the increasing of the vibration source distance from the city wall.Based on comprehensive consideration,the city wall is relatively safe if the road is built in the position 20 m away from the city wall.

关 键 词：振动与波 古城墙 开封 交通振动 动力响应 有限元模拟 

分 类 号：TU311.3[建筑科学—结构工程] TU364