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首页> 外文会议>Nonintrusive Inspection, Structures Monitoring, and Smart Systems for Homeland Security >Rapid-to-Deploy Wireless Monitoring Systems for Static and Dynamic Load Testing of Bridges: Validation on the Grove Street Bridge
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Rapid-to-Deploy Wireless Monitoring Systems for Static and Dynamic Load Testing of Bridges: Validation on the Grove Street Bridge

机译：快速部署的无线监控系统，用于桥梁的静态和动态载荷测试：在格罗夫街桥梁上的验证

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摘要

Bridge management officials have expressed a keen interest in the use of low-cost and easy-to-install wireless sensors to record bridge responses during short-term load testing. To illustrate the suitability of wireless sensors for short-term monitoring of highway bridges, a wireless monitoring system is installed upon the Grove Street Bridge to monitor structural responses during static and dynamic load testing. Specifically, load testing of the Grove Street Bridge is conducted after its construction to validate the behavior of a novel jointless bridge deck constructed from a high-performance fiber reinforced cementitious composite (HPFRCC) material. A heterogeneous array of sensing transducers are installed in the bridge including metal foil strain gages, accelerometers and linear variable differential transducers (LVDTs). First, the acceleration response of the bridge is monitored by the wireless system during routine traffic loading. Modal parameters (modal frequencies and mode shapes) are calculated by the wireless sensors so that an analytical model of the bridge constructed in a standard commercial finite element package can be updated off-line. Next, the bridge is closed to traffic and trucks of known weight are parked on the bridge to induce static deformations. The installation strategy of the wireless monitoring system during static load testing is optimized to monitor the strain and rotation response of the HPFRCC deck. The measured static response of the deck is compared to that predicted by the updated analytical model.
机译：桥梁管理人员对使用低成本，易于安装的无线传感器来记录短期负载测试期间的桥梁响应表现出了浓厚的兴趣。为了说明无线传感器适用于公路桥梁的短期监视，在格罗夫街桥梁上安装了无线监视系统，以监视静态和动态载荷测试期间的结构响应。特别是，格罗夫街大桥在施工后进行了载荷测试，以验证由高性能纤维增强水泥复合材料（HPFRCC）材料构造的新型无接缝桥面板的性能。桥中安装了一个异质感测传感器阵列，包括金属箔应变计，加速度计和线性可变差分传感器（LVDT）。首先，在常规流量加载期间，无线系统会监视网桥的加速响应。模态参数（模态频率和模态形状）由无线传感器计算，以便可以离线更新标准商业有限元程序包中构建的桥梁的分析模型。接下来，该桥禁止通行，将重量已知的卡车停在该桥上以引起静态变形。优化了无线监控系统在静态负载测试期间的安装策略，以监控HPFRCC平台的应变和旋转响应。将测得的甲板静响应与更新的分析模型预测的静响应进行比较。

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