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高强钢高强度螺栓摩擦型连接预紧力松弛试验研究

Jianzhu Gangjiegou Jinzhan
预紧力大小是影响高强度螺栓摩擦型连接承载性能的关键因素之一，而高强度螺栓的预紧力会随时间增加逐渐衰减。为研究钢材强度等级、螺栓等级、孔型与表面处理方式对高强钢高强度螺栓摩擦型连接预紧力松弛的影响以及探究高强度螺栓长时间下的松弛率，文中进行了55组单栓预紧力松弛试验，分别监测了高强度螺栓紧固后24 h内或100 h内的预紧力松弛演化过程。试验结果表明：接触面采用涂层处理会增大高强钢高强度螺栓摩擦型连接的预紧力松弛率，当涂层过厚时，螺栓紧固后24 h内松弛率最大可达10%以上 ...
高飞, 卞卡, 陈俊波
doaj  

[Current status and future directions of stability reconstruction following spinal tumor resection]. [PDF]

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
Zhou J, Dong J.
europepmc   +1 more source

[Biomechanical analysis of a novel bridging plate for treating Rockwood III acromioclavicular joint dislocation]. [PDF]

Nan Fang Yi Ke Da Xue Xue Bao
Chen Y, Zhang G, Li S, Luo N, Zhang Y.
europepmc   +1 more source

[Early effectiveness of surgical hip dislocation combined with autologous iliac crest bone grafting in treatment of femoral neck fracture nonunion in adolescents]. [PDF]

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
Zhang J, Jin L, Bao T, Huang H, Sun L, Yang X.   +5 more
europepmc   +1 more source

[Efficacy and safety of emergency administration of tranexamic acid in elderly patients with intertrochanteric femoral fractures]. [PDF]

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
Rui C, Dai G, Fan W, Zhou S, Tian C, Shi L, Xie T, Zhang C, Chen X, Chen H, Rui Y.   +10 more
europepmc   +1 more source

[All-arthroscopic reduction and fixation of Pipkin type <b>Ⅰ</b> and <b>Ⅱ</b> femoral head fractures]. [PDF]

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
Lü J, Wang H, Chen L, Ni Q.
europepmc   +1 more source

[Research progress on the role and mechanism of magnesium element and magnesium materials in tendon-bone interface healing]. [PDF]

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
Yue H, Zhu X, Sun Z, Meng J, Hao S, Dong X, Gao Z.   +6 more
europepmc   +1 more source

[Effect of different bone grafting methods and internal fixation on mechanical stability of Schatzker type <b>Ⅱ</b> tibial plateau fracture]. [PDF]

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
Wang Z, Wang Y, Tian S, Wang Z, Zhang R, Lian X, Zheng Z, Zhang Y.   +7 more
europepmc   +1 more source

基于组件法的栓焊节点高温力学模型

Jianzhu Gangjiegou Jinzhan
钢框架梁柱连接节点的高温力学性能是影响火灾下钢框架结构抗连续倒塌性能的关键因素之一。基于组件法，将栓焊节点分解为翼缘拉压组件、连接板螺栓孔承压组件、螺栓受剪组件、梁腹板螺栓孔承压组件和螺栓滑移组件等基本组件，并分别对各组件的等效弹簧力学模型开展理论推导，最终建立了栓焊节点高温组件模型。基于已开展的栓焊节点抗火试验，构建了节点整体受力分析杆系模型，并通过对比有限元结果和试验结果，验证了组件模型的有效性和准确性。研究结果表明 ...
李永梅, 丁润民, 刘美景, 范圣刚   +3 more
doaj  

[Comparative efficacy of robot-assisted minimally invasive technique versus open reduction and internal fixation for Schatzker type I to III tibial plateau fractures]. [PDF]

Zhong Nan Da Xue Xue Bao Yi Xue Ban
Lu J, Liu F, Wang K, Huang D, Zou Y, Chen L.   +5 more
europepmc   +1 more source