Results 51 to 60 of about 18,303 (165)
Jianzhu Gangjiegou Jinzhan, 2003 在大跨度空间钢结构施加预应力是一个钢结构应用的新技术,预应力空间钢结构与传统的大跨度钢结构相比,具有节省用钢和建设速度快两大优点。在国内某民航基地維修机库的建造中,采用了国外某公司的预应力钢结构专利新技术。与传统的大跨度钢结构相比,该项技术使该工程妁用钢量减少了40％,并使工期缩短了50％。本文介绍了这一工程中应用的大跨度空间预应力钢结构的张拉新技术。
朱光照
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Jianzhu Gangjiegou Jinzhan, 2022 张弦结构由上弦刚体、下弦柔性拉杆及其之间的刚性撑杆构成。异形张弦梁钢拉杆非张拉建立预应力施工技术，即在张弦梁安装阶段对上弦刚体进行预变形处理，并调节钢拉杆的长度，再通过卸载临时支撑，上弦刚体回弹，在撑杆的作用下钢拉杆被动受拉，从而为张弦梁建立预应力，临时支撑的卸载过程即为张弦梁的加载过程。实施该方法之前先进行全过程施工模拟计算，施工过程中进行应力-应变监测，施工完成后对钢拉杆进行内力检测。结果表明，该施工技术的力学原理成立，操作简便，内力转换高效，精度满足要求，对类似工程具有参考意义。
周国军 +3 more
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Model test study on bearing effect prestressing anchors in shallow buried tunnels [PDF]
The use of prestressing anchor active support technology in tunnel engineering is becoming morecommon.However, the support characteristics and mechanism of action have not been fully understood for shallow, large-span rocky tunnels.In order to ...
CAO Lixue +4 more
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Conservation Biology, Volume 40, Issue 2, April 2026.Abstract Consumer demand for ivory perpetuates the unsustainable and illegal killing of African elephants and other wildlife species. Interventions that aim to change consumer behavior are increasingly recognized as a crucial element of demand management. However, poor design and implementation have limited their effectiveness.
Molly R. C. Brown +2 more
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Gaoya dianqi, 2015 直流滤波电容器是直流输变电中的重要设备,以往对其抗震分析未考虑预应力的影响。文中探讨了预应力对直流滤波电容器模态的影响,通过计算说明预应力的存在提高了直流滤波电容器的固有频率,并对直流滤波电容器进行了3种载荷组合分析,得到了放置框架和棒形悬式复合绝缘子应力储备系数。
刘朝丰, 金松安, 李龙, 苏开云
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THE METHOD OF CENTROID LUMPED MASS IN THE FINITE ELEMENT [PDF]
, 2010 提出利用单元质量质心集中方法来优化单元惯性效应表征、改善单元力学效应匹配的思想: 将单元质量质心集中能够建立精确描述单元质点系惯性效应的动力学方程, 进而达到优化单元惯性效应表征以及改善单元惯性和变形两种力学效应匹配的目的 ...
丁桦, 段鹏飞, 江增荣
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Interpreting in the field of engineering: technical interpreting in railway constructions [PDF]
, 2023 La selección del área de especialización es una decisión importante que todos los intérpretes deben tomar al inicio de su carrera profesional. La interpretación técnica, tras una formación básica, se presenta como una opción que llena de oportunidades
Yuan, Tao
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Genomic responses to increased temperature and pollinator selection in Brassica rapa L.
New Phytologist, Volume 250, Issue 2, Page 1231-1247, April 2026.Summary Rapid environmental change reshapes both abiotic stress and biotic interactions, yet it remains unclear how these combined forces structure plants' genomic adaptation. In particular, the joint influence of temperature and pollinator identity, two ecological axes undergoing simultaneous global shifts, has rarely been quantified at genomic ...
Yanqian Ding, Florian P. Schiestl
wiley +1 more source
Seismic Response Analysis of Small Modular Reactor Containment Based on LRB and FPS Isolation Strategies [PDF]
Small modular reactor (SMR) refers to a new generation of reactors with a unit power output of less than 300 MW. These reactors utilize innovative technologies for modular design and rapid on-site assembly.
JI Xiaoyu1, CHEN Nanyu1, CHEN Mufeng2, ZHANG Shuaijun1, HOU Gangling1, CAI Xuesong1
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Jianzhu Gangjiegou Jinzhan, 2018 提出一种基于损伤可控的梁柱节点(Web-Connected and Prestressed节点,简称WCP节点)。通过在梁端腹板设置连接钢板、摩擦耗能螺栓以及预应力筋,将梁柱连接在一起。为了研究该类节点的滞回性能、自复位能力和损伤特征,设计、制作并完成了4个足尺节点试件的低周往复试验,分别考虑了预应力筋的初始张拉力、高强度螺栓的预紧力以及拼接板的表面处理方式对节点性能的影响。试验结果表明:该类节点的破坏主要集中在拼接部分;节点通过螺栓的滑移变形提供了较好的耗能能力;预应力筋能够增强节点的刚度 ...
蔡鑫 +6 more
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