Research on Bearing Capacity of Angle Steel Transmission Tower Subject to Parallel Reinforcement by Fitting Channel Steel [PDF]
, 2023 [Introduction] The existing angle steel transmission tower has been running for many years, and the structural damage leads to the reduction of service performance.
Donghong ZHANG +4 more
core +1 more source
, 2018 挠曲电效应是一种新兴的机电耦合效应,在微纳米尺度的传感器、致动器和俘能器方面有广阔的应用前景.本文基于挠曲电材料的变分原理和电吉布斯自由能,推导了表面覆盖电极的挠曲电悬臂梁在电学开路条件下的机电耦合动力学控制方程和相应的力电边界条件.进一步获得了求解电学开路条件下挠曲电悬臂梁自振频率的超越方程.以聚偏氟乙烯(PVDF)材料为算例,讨论了挠曲电系数、末端质量块和梁尺寸对结构自振频率和电学开路/短路条件下结构自振频率有效频移的影响.计算结果表明,挠曲电系数的增大会提高梁的自振频率 ...
周志东 +3 more
core +1 more source
Analysis of the influencing parameters of stability for half-through steel arch bridge [PDF]
, 2016 以某中承式钢拱桥为研究对象,基于有限元稳定分析理论,采用大型有限元软件ANSYS,对该拱桥的稳定安全系数进行了计算,并从荷载布置方式、拱肋抗弯刚度、主梁抗弯刚度、吊杆刚度等方面,分析了影响该拱桥稳定性的因素,得到了一些有价值的结论。Based on the stability theory of arch bridge,the finite element software ANSYS is used to calculated the stability factor and study the ...
李双全
core
Analytical computation of settlement displacement of buried pipeline caused by excavation [PDF]
Excavation can induce the settlement deformation of adjacent buried pipeline. Obtaining the deformation is of great significance for evaluating the normal use and safety of pipeline.
Jinze HE +3 more
core +1 more source
PLASTIC ANALYSIS ON COMPATIBILITY TORSION OF REINFORCED CONCRETE SPANDREL BEAM [PDF]
, 2007 在对模型试验分析的基础上,指出钢筋混凝土梁协调扭转设计的关键是控制扭转角,讨论了正常使用状态下钢筋混凝土梁扭转角的控制值及抗扭刚度,并基于上述抗扭刚度分析其塑性协调扭矩及抗扭刚度调整系数。还讨论了影响抗扭刚度调整系数主要因素,给出了抗扭刚度调整系数的范围。研究表明,在一定条件下,可获得较大的调整幅度,有利于指导工程设计。Based on the analysis of model test,it is pointed out that the design key of compatibility ...
李少泉, 李悦军, 沙镇平
core
Whole process finite element analysis of the load-bearing behavior of slope-stabilizing piles using three-dimensional triple nonlinearity [PDF]
Slope-stabilizing piles typically are commonly permitted significant horizontal displacement while satisfying the requirement of bearing capacity. The in-situ pile tests of such piles indicate that with a minor thrust and a pile top displacement of less ...
Dan XU +3 more
core +1 more source
More Investigation of Unified-connected-parameter Method for Composite Material Combined Tubes Under Pure Bending Loading [PDF]
, 2017 复合材料组合管的纯弯曲问题是一个广义平面问题，需要采用包含两个应力函数的柔度法进行求解。本文首先对包含柱型正交各向异性特殊缠绕层即0°或90°缠绕层以及各向同性层的不同复合材料组合管的应力特征进行有限元精细的数值模拟，指出当有普通缠绕层与之相邻时，不仅有面内应力而且有面外应力，所以，即便是特殊缠绕层和各向同性层也需要采用双应力函数进行求解。然后对复合材料管分析的双应力函数柔度法及其改进进行了详细分析和讨论，指出（1）Lekhnitskii的单个应力函数柔度法只能求解特殊缠绕层及其组合的情况；（2 ...
柯淼宏
core
美国规范关于现浇钢筋混凝土双向板楼盖结构的直接设计法 [PDF]
, 2009 本文介绍了美国规范在设计双向板时采用的直接设计法,包括直接设计法的使用条件、总静力弯矩及其分配方式。并结合实例进行了计算 ...
蔡俊杰, 郝源
core
Stability Analysis of The Half-through Steel Arch Bridge with a single rib [PDF]
, 2016 拱桥作为一种承压体系，承载能力必定会受到稳定性的影响。其中单肋钢拱桥因横向刚度小、面外刚度远小于其面内刚度，其稳定问题更是突出。本文以单肋中承式钢拱桥厦门市天圆大桥为工程背景，主要进行了以下工作的研究： （1）总结了拱桥屈曲临界荷载的计算方法，并通过算例进行了稳定性计算分析，总结出实用计算法和有限元计算法各自的优缺点及适用范围。 （2）通过大型有限元计算软件ANSYS对厦门市天圆大桥进行了14种荷载工况下的结构线弹性稳定性分析，并得出拱桥的稳定安全系数和失稳模态 ...
李双全
core
A novel approach for applying active surface pre-stress on surrounding rocks of roadways by backfilling behind surface support [PDF]
In response to the poor active support effect of the surface protection components in soft coal roadway and the continuous expansion of the broken range of local exposed surrounding rock, which leads to the failure of anchor rod and cables, a mesh ...
Fuqiang GAO +4 more
core +1 more source