Results 21 to 30 of about 1,605 (148)
Jianzhu Gangjiegou Jinzhan, 2020 介绍了高性能钢结构若干重要概念,指出高性能钢结构应满足承载性好、承灾性好和施工性好要求。而承载性好的钢结构应在确定的条件下具有较好的使用功能和较大的承载能力;承灾性好的钢结构应在罕遇的大地震下不发生整体结构倒塌,以及在可能发生的火灾、爆炸作用下产生的结构局部破坏不会引起结构的连续性倒塌;而施工性好的钢结构应便于制作与安装,减少施工工期与成本。还提出了高性能钢结构相关重要概念的实现方法,指出高承载性钢结构可以从采用高强结构钢材料、高承载结构构件和高效结构体系3个方面加以实现 ...
李国强
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Research on Structural Design and Mechanical Behavior of Double Arc Tooth Profile Harmonic Drive [PDF]
, 2015 谐波齿轮减速器是一种传动精度高、减速比大并能够在密闭空间传动的齿轮传动机构，应用领域广泛，尤其在航空航天领域有不可替代的优势。常用的渐开线齿廓齿根处会出现应力集中以及齿顶产生尖点啮合现象，影响其承载性能和啮合质量。双圆弧齿形谐波齿轮以其良好的承载能力与啮合性能逐渐成为研究热点，本文根据谐波齿轮设计理论设计了双圆弧谐波齿轮装置，并对其结构性能、接触特性以及动力学等方面的分析，探索相关规律，为后续在结构优化、增强啮合性能提供了一定的理论依据。 论文主要包括以下几方面内容： 1 ...
王萌萌
core
People and Nature, Volume 7, Issue 11, Page 2700-2713, November 2025.Abstract Large old trees are important ecological entities in human settlements, providing cultural values and ecological services that are threatened by current and future changes in global climate, land use and disturbance regimes. Some studies suggest incorporating social and cultural significance into the conservation of large old trees.
Zhuo Cheng +5 more
wiley +1 more source
Jianzhu Gangjiegou Jinzhan, 2023 为研究带PEC端柱混凝土剪力墙的抗震性能，对两片相同的带PEC端柱混凝土剪力墙试件进行了低周反复荷载试验研究。对试件的破坏现象、滞回曲线、骨架曲线、耗能能力、应变变化规律和承载力进行分析，并研究了轴压比的影响，结果表明：带PEC端柱混凝土剪力墙试件具有较高的承载能力和耗能能力，延性系数达到4.84~5.16，表现出良好的抗倒塌能力；随着试验轴压比的增大，试件的极限承载力有些许提高，但延性降低。按现行《组合结构设计规范》（JGJ 138—2016）中相关公式计算的承载力与试验值吻合较好 ...
李奉阁, 陈玥, 赵根田
doaj
Bearing characteristics of variable diameter micropile based on the improvement of group pile foundation [PDF]
To improve the load-bearing of transmission tower micropile foundation and reduce the material cost, a modified variable diameter micropile foundation type based on group micropile is proposed in this study.
Bin DONG +5 more
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Religious uses shape the selection and distribution of Chinese Buddhist tree species
People and Nature, Volume 7, Issue 9, Page 2094-2105, September 2025.Abstract As a widely disseminated world religion, Buddhism's selection of religious species may profoundly impact candidate species distribution. This study sampled 246 Chinese temples covering diverse regions to investigate the selection modes of Buddhist tree species (BTS) and the alien religion's influence on Chinese indigenous biodiversity and ...
Cheng Jin +8 more
wiley +1 more source
Jianzhu Gangjiegou Jinzhan, 2022 开展高温后水冷Q690高强钢的材性试验研究，明确高温对Q690高强钢力学性能的影响规律。在考虑材料非线性和几何非线性的基础上，将高温后水冷Q690高强钢的材性引入数值分析模型，在ABAQUS有限元软件中实现考虑屈曲后性能的Q690高强钢板梁的火灾后剩余承载性能分析。研究结果表明：暴露温度700 ℃为Q690高强钢力学性能变化的分界点。随着暴露温度的升高，fy和fu都表现出先减小后增大的规律。暴露温度对Q690高强钢弹性模量的影响较小。当暴露温度为800 ℃和900 ℃时 ...
华建民 +5 more
doaj
Study on bearing performance of friction pile foundation in complicated soil-layers [PDF]
, 2017 2003-2004 > Academic research: refereed > Publication in refereed journalVersion of ...
Li, SH, Yang, WG, Yin, JH, Zhou, J
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Analytical solution for negative skin friction of single pile based on effective stress method [PDF]
The calculation method for negative skin friction of a single pile has not been unified yet. To improve the design and calculation level of the single pile under vertical load considering negative skin friction, the threshold limit value of pile skin ...
Kun WANG +5 more
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Reverse modeling and simulation for folding and deployment of inflatable aerodynamic decelerator [PDF]
The folding and development performance and aerodynamic bearing capacity of the inflatable aerodynamic decelerator are two key issues in its safety evaluation.
HE Yiqian +6 more
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