A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Method for rapidly detecting deflection of simply supported girder bridge
The invention discloses a method for quickly detecting deflection of a simply supported girder bridge in the technical field of engineering detection. The method comprises the following steps: acquiring a mid-span strain time history response when a vehicle passes through a bridge by using a strain sensor mounted at a mid-span position at the bottom of the bridge; filtering a high-frequency vibration signal of the mid-span strain time history response by adopting a wavelet transform method to obtain a quasi-static response; converting the quasi-static response into conversion strain distribution in a bridge span direction; and inputting the conversion strain distribution into a strain-deflection calculation formula considering error correction to calculate the equivalent static deflection. The strain sensor is installed at the midspan position of the bottom of the bridge, the structural strain time-history response of the vehicle traffic load passing through the bridge is collected, bridge midspan equivalent static deflection rapid measurement is achieved, and the method is clear in theory, simple in technical device, low in cost and suitable for rapid deflection detection or monitoring of small and medium-span bridges.
本发明公开了工程检测技术领域的一种简支梁桥挠度快速检测方法，包括：利用安装在桥梁底部跨中位置的应变传感器采集车辆经过桥梁时的跨中应变时程响应；采用小波变换的方法过滤跨中应变时程响应的高频振动信号，得到准静态响应；将准静态响应转换成桥梁跨度方向的换算应变分布；将换算应变分布输入考虑误差修正的应变‑挠度计算公式计算等效静力挠度。本发明通过在桥梁底部跨中位置安装一个应变传感器，采集车辆交通荷载通过桥梁的结构应变时程响应，实现桥梁跨中等效静力挠度快速测量，本发明理论清晰，技术装置简单，成本低，适用于中小跨桥梁的挠度快速检测或监测。
Method for rapidly detecting deflection of simply supported girder bridge
The invention discloses a method for quickly detecting deflection of a simply supported girder bridge in the technical field of engineering detection. The method comprises the following steps: acquiring a mid-span strain time history response when a vehicle passes through a bridge by using a strain sensor mounted at a mid-span position at the bottom of the bridge; filtering a high-frequency vibration signal of the mid-span strain time history response by adopting a wavelet transform method to obtain a quasi-static response; converting the quasi-static response into conversion strain distribution in a bridge span direction; and inputting the conversion strain distribution into a strain-deflection calculation formula considering error correction to calculate the equivalent static deflection. The strain sensor is installed at the midspan position of the bottom of the bridge, the structural strain time-history response of the vehicle traffic load passing through the bridge is collected, bridge midspan equivalent static deflection rapid measurement is achieved, and the method is clear in theory, simple in technical device, low in cost and suitable for rapid deflection detection or monitoring of small and medium-span bridges.
本发明公开了工程检测技术领域的一种简支梁桥挠度快速检测方法，包括：利用安装在桥梁底部跨中位置的应变传感器采集车辆经过桥梁时的跨中应变时程响应；采用小波变换的方法过滤跨中应变时程响应的高频振动信号，得到准静态响应；将准静态响应转换成桥梁跨度方向的换算应变分布；将换算应变分布输入考虑误差修正的应变‑挠度计算公式计算等效静力挠度。本发明通过在桥梁底部跨中位置安装一个应变传感器，采集车辆交通荷载通过桥梁的结构应变时程响应，实现桥梁跨中等效静力挠度快速测量，本发明理论清晰，技术装置简单，成本低，适用于中小跨桥梁的挠度快速检测或监测。
Method for rapidly detecting deflection of simply supported girder bridge
一种简支梁桥挠度快速检测方法
TANG YONGSHENG (author) / CANG MOTOGANG (author)
2022-04-12
Patent
Electronic Resource
Chinese
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