Results 41 to 50 of about 4,128 (203)
Research on method of model selection in basement of high-rise building structure design [PDF]
, 2016 随着建设规模的不断扩大和土建技术的进步，现代高层建筑地下室的形式越来越多样化，工程环境条件更加的复杂，地下室结构设计时所需考虑的因素更多、所需处理的问题更复杂。地下室结构在整体结构中所占的比重越来越大，所需工期越来越长，使得地下室结构方案的选择对整体结构的影响也越来越重。地下室结构选型是地下室结构设计中的一个重要环节，具有涉及因素多，不确定性大，各因素间相互关联性大等特点。随着建筑工程信息化的发展，迫切需要一个准确性高、覆盖面广、操作便捷的地下室结构方案选型决策辅助工具，帮助结构设计师全面 ...
杨信
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Jianzhu Gangjiegou Jinzhan, 2021 设计了复式钢管混凝土钢梁半穿心加肋加腋型节点,制作了4个梁柱试件组合体进行低周往复加载试验,并采用ABAQUS有限元软件建立了节点数值分析模型。半穿心节点刚度较大,破坏模式主要为梁端塑性铰破坏,节点试件的滞回曲线呈明显的纺锤形,耗能性能较好,有限元分析结果与试验结果吻合较好。利用有限元模型研究了节点构造、几何参数和材料参数对半穿心节点的破坏模式和承载力的影响。参数分析表明:梁柱线刚度比及轴压比对节点初始刚度影响显著;轴压比和钢梁强度对节点极限承载力影响较大;而节点的变形能力受轴压比影响较大 ...
张玉芬 +3 more
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Influence of loading system stiffness on unstable failure mode and energy evolution of sandstone under lateral constraints [PDF]
In order to explore the influence of the stiffness of the loading system on rock failure mode and energy evolution law, the self-developed rigidity and variable stiffness test system is used to carry out biaxial compression tests, and the mechanism of ...
Chongyan LIU +6 more
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Experimental investigation on fracture behavior of lignite and its fracturing significance:taking Shengli Coalfield as an example [PDF]
, 2023 The anisotropy of fracture properties at different bedding orientations of lignite plays an important role in controlling the formation of fracture network of reservoir racturing.
Diankun ZHANG +2 more
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Experimental study on dynamic mechanical properties and damage law of steel fiber concrete [PDF]
Investigating the effect of steel fiber blending schemes on the dynamic mechanical properties and damage evolution of concrete is crucial for deep-shaft construction projects.
Diyuan LI +4 more
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Effect of the density and inclination of joints on the strength and deformation properties of rock-like specimens under uniaxial compression [PDF]
, 2017 The effects of the combination of joint density and inclination on the strength and deformation characteristics of rocklike specimens containing open joints were studied by using uniaxial compression tests.
CAO Ping +5 more
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Jianzhu Gangjiegou Jinzhan, 2019 通过对多层钢框架进行增量动力分析,研究柱脚转动刚度、底层破坏模式以及钢柱宽厚比对多层钢框架抗震性能的影响,具体从结构倒塌储备系数、地震易损性以及结构局部响应考察各影响因素对结构抗震性能的影响。分析结果表明,当破坏模式由钢柱破坏控制时,随着钢柱宽厚比的增大结构抗震性能减弱,考虑柱脚刚度的半刚接柱脚钢框架地震易损性与刚接柱脚钢框架差别较小,当柱脚与柱刚度比为2.0时,框架地震易损性与刚接柱脚钢框架非常接近;当破坏模式由柱脚破坏控制时,可以明显降低钢柱宽厚比的要求。
崔瑶, 刘浩, 王枫智, 山田哲
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Jianzhu Gangjiegou Jinzhan, 2020 为了获悉苏州太平金融高层格构式树形柱的轴压性能和破坏机理,对格构式树形柱缩尺试件展开了轴压试验研究。试验结果表明,格构式树形柱的轴压受力性能良好,试件破坏主要集中在分肢柱弯头处。利用ABAQUS有限元软件建立了格构式树形柱的数值分析模型,通过破坏模式和荷载-位移曲线验证了有限元分析模型的准确性。针对格构式树形柱在较大轴压荷载作用下分肢柱弯头处破坏的情况,提出了提高十字拉结梁高度、设置纵向隔板、填充混凝土等3种构造加强措施,并通过有限元分析验证了其改善效果。研究表明 ...
王静峰 +4 more
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Jianzhu Gangjiegou Jinzhan, 2023 螺纹锚固单边螺栓锚固于带螺纹的螺栓孔。螺纹锚固单边螺栓无需螺母，能够实现单侧安装，因此非常适用于闭口截面钢构件的连接。了解不同结构在火灾后的受力性能具有重要的工程意义，能够为受火结构的鉴定和修复提供依据。通过试验研究了螺纹锚固单边螺栓连接节点在火灾后的性能，试验中采用全过程的加载方式，模拟了火灾从开始到结束的过程，并考虑了火灾发生时节点承受的荷载大小和火灾温度对于其火灾后残余力学性能的影响。试验结果表明，螺纹锚固单边螺栓连接节点共有两种破坏模式，分别为钢管壁屈服破坏和T形板翼缘屈服伴随螺栓破坏 ...
闵凡文 +5 more
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Effect of various primers on the long-term bond strength to zirconia [PDF]
Objective To compare the effects of 10-methacryloyloxydecyl dihydrogen phosphate (10-MDP)- and silane-based primers with those of MDP-based primers on zirconia-resin bonding via multiple levels of aging. Methods Zirconia blocks were divided into 4 groups
ZHAO Li, ZHAO Ke
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