全轻量化预制混凝土隧道地震响应特性研究

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2021-07-01 DOI:10.12989/EAS.2021.21.1.051

Yanmin Yang, Ran Xu, Yongqing Li, Zi-li Li

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引用次数: 2

摘要

为了评价全轻混凝土预制公用工程隧道的地震反应特性，对四条不同变量的预制公用工程进行了试验。通过振动台试验，分析了单向地震作用下的地震反应特性。并利用ABAQUS软件建立了相应的数值分析模型。在模拟结果与试验数据比较的基础上，系统地研究了全轻混凝土、拱腋高度和配筋率等参数对预制通用隧道地震反应的影响。结果表明，全轻质混凝土显著降低了预制隧道的峰值加速度、加速度放大系数和峰值位移，从而降低了预制工程隧道的地震反应。当适当增加拱腋高度和配筋率时，预制公用工程隧道的抗震性能可以略有改善。此外，全轻混凝土预制通用隧道的峰值位移能够满足要求，直到试验结束，没有出现明显的损坏。模拟结果与实验数据吻合较好，地震反应特征一致。研究结果可为全轻混凝土预制通用隧道的推广应用提供技术依据。

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Study on seismic response characteristics of full light-weight concrete prefabricated utility tunnels

In order to evaluate the seismic response characteristics of full light-weight concrete prefabricated utility tunnels, four prefabricated utility tunnels were conducted for test with different variables. Under unidirectional seismic excitation, the seismic response characteristics were analyzed by shaking table tests. And the corresponding numerical analysis models were proposed with ABAQUS. Based on the comparison between the simulation results and the experimental data, the influences of the parameters that full light-weight concrete, haunch heights, and reinforcement ratio on seismic response of prefabricated utility tunnels were systematically studied. The results indicated that the value of the peak acceleration, acceleration amplification factor, and peak displacement were reduced significantly with full light-weight concrete, which could decrease the seismic response of prefabricated utility tunnels. When the haunch heights and reinforcement ratio were properly increased, the seismic performance of prefabricated utility tunnels could be improved slightly. In addition, the peak displacement of full light-weight concrete prefabricated utility tunnels could meet the requirements, and there was no obvious damage until the end of test. The simulation results were in good agreement with the experimental data, and the seismic response characteristics were consistent. The results of this paper could provide a technical basis for the promotion and application for full light-weight concrete prefabricated utility tunnels.

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.