Jianzhu Gangjiegou Jinzhan, 2019 为研究曲线CHS主钢管X形节点平面内受弯性能,建立了节点数值分析模型。首先,通过与轴压试验结果对比,验证了所建模型的准确性。进而分析主管曲直径比α、腹主管直径比β、主管径厚比γ对节点平面受弯性能的影响,并将有限元所得节点抗弯承载力与国外规范结果的比值Muf/Mu1、Muf/Mu2、Muf/Mu3进行对比分析。结果表明:当α≤12时,节点抗弯承载力随α增大而降低;而当α>12时,节点抗弯承载力基本不变。随β值增大,节点抗弯承载力增大;随γ值减小,节点抗弯承载力增大。美国规范未考虑γ的影响 ...
江锐, 江力强
doaj
Jianzhu Gangjiegou Jinzhan, 2018 三面受火钢柱可能发生绕强轴的弯曲失稳或绕弱轴的弯扭失稳,而两相邻面受火钢柱仅发生弯扭失稳。将钢柱截面温度场假设成简化的线性分布,对不均匀受火钢柱进行恒荷载升温分析,可得到钢柱发生整体失稳破坏时的临界温度。三面受火钢柱的临界温度与欧洲规范EN 1993-1-2的结果较为接近,可直接由EN 1993-1-2公式计算。对于两相邻面受火钢柱,可由EN 1993-1-2的计算结果乘以修正系数,文中给出了该修正系数的计算公式。
夏金环, 王培军, 周吉学
doaj
Dianci bileiqi, 2015 为确保±1100 kV/16 kN支柱瓷绝缘子抗弯性能满足要求,通过对样品的三节、四节、五节、六节进行整柱弯曲破坏负荷试验,摸索出多节产品在承受整柱破坏负荷时的应力变化。初步确定,在多节产品的设计过程中,等应力设计具有一定的不合理性。对±1100 kV/16 kN支柱瓷绝缘子的各节应力选取时,要有不小于10%的应力叠装系数。试验证明:选用此种应力分布设计的产品,满足整柱的抗弯性能要求,可以满足±1100 kV特高压工程的需要。
杨海 +6 more
doaj
[Research on a muscle fatigue quantification based on an improved critical power model]. [PDF]
Sheng Wu Yi Xue Gong Cheng Xue Za ZhiWu X, Shang J, Niu X, Lin H, Du Y.
europepmc +1 more source
Jianzhu Gangjiegou Jinzhan为研究不锈钢筋-圆不锈钢管海砂混凝土构件的受弯性能，文中建立了该类构件的有限元分析模型。基于有限元典型算例，分析了其纯弯全过程的受力机理。并对该类构件进行了参数分析，系统研究了混凝土强度、钢管屈服强度、纵筋屈服强度、钢管含钢率和纵筋配筋率对该类组合构件纯弯性能的影响规律。研究结果表明：内置纵筋显著提高了该构件的抗弯承载力；且组合构件的抗弯承载力随混凝土强度、钢管屈服强度、纵筋屈服强度、钢管含钢率和纵筋配筋率的增大而增大；该组合构件的抗弯刚度随混凝土强度、钢管含钢率和纵筋配筋率的增大而增大 ...
李德山 +4 more
doaj
[Interpretation of the 2025 Asian Federation of Osteoporosis Societies (AFOS) Clinical Consensus: Atypical femoral fractures in patients with osteoporosis]. [PDF]
Zhongguo Xiu Fu Chong Jian Wai Ke Za ZhiXie M, Kong Q.
europepmc +1 more source
[Analysis of complicating factors in endodontic microsurgery]. [PDF]
Hua Xi Kou Qiang Yi Xue Za ZhiTan X +9 more
europepmc +1 more source
[Impact of lamina formation range on lumbar biomechanics in unilateral biportal endoscopic spine surgery: a finite element analysis for surgical optimization]. [PDF]
Zhongguo Xiu Fu Chong Jian Wai Ke Za ZhiJi S +10 more
europepmc +1 more source
[Combined assessment of gastric mucosal damage associated with <i>Helicobacter pylori</i> infection in children by virulence factors and pepsinogen]. [PDF]
Zhongguo Dang Dai Er Ke Za ZhiHuang CL, Lin Q.
europepmc +1 more source
[Adhesive property and flexural strength of patterned microstructured zirconia posts fabricated by 3D printing]. [PDF]
Hua Xi Kou Qiang Yi Xue Za ZhiJiang Q, Yin L.
europepmc +1 more source