The development of the sensor suitable for measuring large load stress to the anchor cable becomes an important task in bridge construction and maintenance. Therefore, a new type of optical fiber sensor was developed ...The development of the sensor suitable for measuring large load stress to the anchor cable becomes an important task in bridge construction and maintenance. Therefore, a new type of optical fiber sensor was developed in the laboratory - optical fiber grating sensor for force measurement of anchor cable （OFBFMAC）. No similar report about this kind of sensor has been found up to now in China and other countries. This sensor is proved to be an effective way of monitoring in processes of anchor cable installation, cable cutting, cable force regulation, etc, with the accurate and repeatable measuring results. Its successful application in the tie bar cable force safety monitoring for Wuhan Qingchuan bridge is a new exploration of optical fiber grating sensing technology in bridge tie bar monitoring system.展开更多
为研究锚固螺栓不同紧固扭矩对弹性分开式扣件板下弹性垫板静刚度的影响,以我国地铁常用的DZIII型扣件为研究对象,计算锚固螺栓在不同紧固扭矩作用下对板下弹性垫板的初始预压力,并对TPEE和橡胶类板下弹性垫板在不同初始预压力作用下的...为研究锚固螺栓不同紧固扭矩对弹性分开式扣件板下弹性垫板静刚度的影响,以我国地铁常用的DZIII型扣件为研究对象,计算锚固螺栓在不同紧固扭矩作用下对板下弹性垫板的初始预压力,并对TPEE和橡胶类板下弹性垫板在不同初始预压力作用下的静刚度进行测试和评价。结果表明:锚固螺栓紧固扭矩为150,200,250 N·m时,板下弹性垫板的初始预压力为69.94,93.24,116.54 k N;板下弹性垫板静刚度测试结果同静刚度测试荷载取值范围密切相关,且同初始预压力呈正相关关系;板下弹性垫板静刚度应根据扣件系统正常服役状态下锚固螺栓紧固扭矩引起的初始预压力进行测试和评价。展开更多
基金Supported by the National Natural Science Foundation ofChina (60537050)
文摘The development of the sensor suitable for measuring large load stress to the anchor cable becomes an important task in bridge construction and maintenance. Therefore, a new type of optical fiber sensor was developed in the laboratory - optical fiber grating sensor for force measurement of anchor cable （OFBFMAC）. No similar report about this kind of sensor has been found up to now in China and other countries. This sensor is proved to be an effective way of monitoring in processes of anchor cable installation, cable cutting, cable force regulation, etc, with the accurate and repeatable measuring results. Its successful application in the tie bar cable force safety monitoring for Wuhan Qingchuan bridge is a new exploration of optical fiber grating sensing technology in bridge tie bar monitoring system.
文摘为研究锚固螺栓不同紧固扭矩对弹性分开式扣件板下弹性垫板静刚度的影响,以我国地铁常用的DZIII型扣件为研究对象,计算锚固螺栓在不同紧固扭矩作用下对板下弹性垫板的初始预压力,并对TPEE和橡胶类板下弹性垫板在不同初始预压力作用下的静刚度进行测试和评价。结果表明:锚固螺栓紧固扭矩为150,200,250 N·m时,板下弹性垫板的初始预压力为69.94,93.24,116.54 k N;板下弹性垫板静刚度测试结果同静刚度测试荷载取值范围密切相关,且同初始预压力呈正相关关系;板下弹性垫板静刚度应根据扣件系统正常服役状态下锚固螺栓紧固扭矩引起的初始预压力进行测试和评价。
