Scholarlink

<p>Load testing, the most reliable method for assessing bridge health conditions, presents drawbacks such as time and labor intensiveness, as well as the need for traffic closures, restricting its application to only a few bridges and causing delays in health assessments. As bridges continually endure traffic loads, using ongoing traffic for load testing offers notable advantages. This study introduces an approach to promptly estimate the impact of ongoing traffic on highway bridges at the network level, aiming to evaluate its viability for load testing. The methodology integrates traffic microsimulation and site-specific electronic toll collection (ETC) recordings to evaluate bridge load effects imposed by ongoing traffic. An illustrative case of network-level freeway bridges in Guangdong province, China, is considered, comprising both long-span bridges and their adjacent short-span approach bridges. The modeling of traffic-induced deflections is validated using structural health monitoring data. A load testing efficiency (LTE) metric <i>η</i><sub><i>q</i></sub> is examined and defined as the ratio of ongoing traffic-induced load effects to those derived from design traffic load models. The consistent time-varying trends and comparable magnitudes between modeled and monitored deflections validate the traffic load modeling approach. The results indicate that LTEs of ongoing traffic are <i>η</i><sub><i>q</i></sub> &lt; 0.5 for the super-long-span suspension bridge, <i>η</i><sub><i>q</i></sub> &lt; 0.7 for the cable-stayed bridge, and considerable events with <i>η</i><sub><i>q</i></sub> ≥ 0.7 for continuous rigid frame girder bridges. Additionally, short-span approach bridges exhibit higher LTEs compared to long-span main bridges. These findings indicate that if LTEs with <i>η</i><sub><i>q</i></sub> ≥ 0.5 and <i>η</i><sub><i>q</i></sub> ≥ 0.7 suggest potential suitability and full adequacy for bridge load testing, respectively, ongoing traffic can effectively be used for load testing all these bridges except for the super-long-span suspension bridge.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Feasibility study of bridge load testing using ongoing traffic through rapid estimation of traffic load effects for network-level highway bridges assisted by site-specific ETC data

  • 期刊论文

  • 发表日期：

    2025年2月1日

查看全文
  • Junyong Zhou,
  • Yanlong Zheng,
  • Zeyin Tan,
  • Bin Wei,
  • Xiaoyi Zhou,
  • Xin Ruan

摘要

Load testing, the most reliable method for assessing bridge health conditions, presents drawbacks such as time and labor intensiveness, as well as the need for traffic closures, restricting its application to only a few bridges and causing delays in health assessments. As bridges continually endure traffic loads, using ongoing traffic for load testing offers notable advantages. This study introduces an approach to promptly estimate the impact of ongoing traffic on highway bridges at the network level, aiming to evaluate its viability for load testing. The methodology integrates traffic microsimulation and site-specific electronic toll collection (ETC) recordings to evaluate bridge load effects imposed by ongoing traffic. An illustrative case of network-level freeway bridges in Guangdong province, China, is considered, comprising both long-span bridges and their adjacent short-span approach bridges. The modeling of traffic-induced deflections is validated using structural health monitoring data. A load testing efficiency (LTE) metric ηq is examined and defined as the ratio of ongoing traffic-induced load effects to those derived from design traffic load models. The consistent time-varying trends and comparable magnitudes between modeled and monitored deflections validate the traffic load modeling approach. The results indicate that LTEs of ongoing traffic are ηq < 0.5 for the super-long-span suspension bridge, ηq < 0.7 for the cable-stayed bridge, and considerable events with ηq ≥ 0.7 for continuous rigid frame girder bridges. Additionally, short-span approach bridges exhibit higher LTEs compared to long-span main bridges. These findings indicate that if LTEs with ηq ≥ 0.5 and ηq ≥ 0.7 suggest potential suitability and full adequacy for bridge load testing, respectively, ongoing traffic can effectively be used for load testing all these bridges except for the super-long-span suspension bridge.