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Experimental study on progressive failure of anchoring structure under high-frequency and low-energy impact disturbance [PDF]
High-frequency, low-energy impacts consistently inflict damage on the surrounding rock and anchoring structure in deep roadways, leading to ongoing instability. The construction of anchoring support system that can withstand these dynamic impact loads is
Jiaguang KAN +5 more
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, 2007 以北京城市轻轨线某预应力混凝土高架桥连续箱梁的实桥应变观测试验为基础,利用实验数据进行回归分析,阐述了梁体时效变形的发展规律及其对轻轨道路二期施工的影响.实验结果表明:以应变发展规律得出的时效变形系数在数值上能够很好地估算梁体的后期变形增量,合理安排二期施工时间,在该高架桥预应力筋张拉2~3个月后安装桥上轨道设施,梁体后期变形相对增量最大值约为3~4 mm左右,可完全满足钢轨扣件调节量要求 ...
姚谦峰 +3 more
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Functional Ecology, Volume 40, Issue 3, Page 750-763, March 2026.Read the free Plain Language Summary for this article on the Journal blog. Abstract Forests worldwide are increasingly impacted by drought due to climate change, prompting plants to adapt through dehydration tolerance (DT) and avoidance (DA), two distinct physiological strategies.
Xingyun Liang +11 more
wiley +1 more source
He jishu传热管束在横流作用下会发生流弹失稳现象，这极易诱发传热管磨损和破裂，是蒸汽发生器设计和运行中必须重点考虑的安全问题之一。现有研究多集中于升力方向，曳力方向研究较少。但近期研究表明，曳力方向同样存在发生流弹失稳的可能性，因此，对曳力方向流弹失稳也需给予重视。本文利用计算流体力学（Computational Fluid Dynamics，CFD）模拟了横向流作用下单根柔性管在刚性平行三角形管束中的流场分布，结合后处理方法提取了流动通道内的时间延迟函数与衰减函数 ...
白 金, 赵 燮霖, 周 进雄
doaj +1 more source
, 2007 结合北京地铁13号线八达岭高架桥中预应力混凝土高架桥连续箱梁的实桥变形观测试验,以试验数据回归分析了基于综合时效的梁体后期变形.分析结果表明:统计回归所得的时效变形系数,其早期值比按我国铁路规范及ACI(American Concrete Institute)规范修正式计算所得的徐变系数略偏大,终极系数却偏小,同类轻轨高架桥梁结构后期变形按规范设计有足够的安全保证,但应严格控制早期时效变形 ...
姚谦峰, 季文玉, 雷家艳
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Risk, Hazards &Crisis in Public Policy, Volume 16, Issue 1, March 2025.ABSTRACT Disaster insurance is gaining prominence as a tool to address climate‐induced loss and damage in developing countries. Despite ongoing efforts to pilot disaster insurance in Malawi, adoption by households remains low. This study examines factors influencing the adoption of disaster insurance in Malawi, a country highly susceptible to climate ...
Stern Mwakalimi Kita
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Using the IUCN Environmental Impact Classification for Alien Taxa to inform decision‐making
Conservation Biology, Volume 38, Issue 2, April 2024.Abstract The Environmental Impact Classification for Alien Taxa (EICAT) is an important tool for biological invasion policy and management and has been adopted as an International Union for Conservation of Nature (IUCN) standard to measure the severity of environmental impacts caused by organisms living outside their native ranges.
Sabrina Kumschick +24 more
wiley +1 more source
, 2018 以某城市互通立交桥为例,采用有限元方法计算,分析了不同曲率半径对小半径匝道弯桥受力的影响以及对小半径匝道弯桥抗倾覆性能的影响,并分析了支座反力、支座脱空影响、梁体转角、抗倾覆稳定系数计算对比及关键状态。福建省交通运输科技项目 ...
李云州, 李绍松, 裘是
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Zhongguo shiyan zhenduanxue, 2018 目的探讨新生儿听力筛查中听性脑干反应(auditory brainstem response,ABR)对听力损失程度及类型的预测作用。方法选择2008年1月-2014年12月来我院行听力筛查的新生儿485例,利用ABR检测、声导抗检测、40Hz听觉相关电位检测、畸变产物耳声发射(distortion product otoacoustic emission,DPOAE)检测方法对新生儿进行初筛、复筛及复查。结果 485例新生儿ABR听力损失初筛发现49耳轻度(10.10%)、31耳中度(6.60 ...
杨花荣, 延青, 刘妮, 白雅婷
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In-situ monitoring of displacements and stability evaluation of slope based on fiber Bragg grating sensing technology [PDF]
, 2014 2009-2010 > Academic research: refereed > Publication in refereed journalVersion of ...
Fan, Y, Hong, C, Pei, H, Yin, J, Zhu, H
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