1) combined shell element
组合壳单元
1.
Next,with the help of degraded shell element,the concrete and the common steel are simulated using the la-yered shell element and the prestressed steel is simulated using the combined shell element.
为了对预应力混凝土(PC)多梁式梁桥进行非线性全过程分析,采用弥散裂缝模式、Ottosen屈服准则和Hinton压碎准则描述混凝土的开裂、屈服和压碎等非线性变化,引入实体退化壳单元理论,对混凝土和普通钢筋采用分层壳单元模拟,预应力钢筋采用组合壳单元模拟,并根据位移协调性推导了预应力钢筋对组合壳单元刚度矩阵的贡献,提出了一种非线性组合?分层壳单元计算模型,并编制了相应的三维非线性壳单元计算程序。
2) solid degenerated-combined shell element
实体退化组合壳单元
1.
In the model,based on finite element method,tendon was simulated by 3-D link bar element of total Lagrangian method,solid degenerated-combined shell element was used to simulate prestressed concrete beam,and the stiffness of link element contributing to concrete eleme.
应用有限元理论,采用全拉格朗日列式的三维杆单元模拟预应力钢筋;采用实体退化组合壳单元模拟结构;应用钢筋单元和混凝土单元之间的位移场关系形成钢筋对混凝土单元的贡献,将预应力钢筋对结构的作用直接反映在单元模型内部。
3) shell composite
复合壳单元
4) laminated composite shell element
层合壳单元
5) combined element
组合单元
1.
In order to simplify the work of pre-process in finite element analysis of large scale bolted rock discontinuities,a combined element model of bolted rock discontinuities is presented based on the displacement interpolation function of discontinuity element and the stiffness matrix of bolt element.
为了简化大规模加锚岩体结构面有限元分析的前处理过程,通过结合结构面单元的位移插值函数和虚拟锚杆单元的刚度矩阵,提出了加锚岩体结构面组合单元模型。
2.
Since pre-stressed concrete box girders usually have a large number of curve pre-stressed tendons,a type of combined element is presented to simulate the prestressed tendons of box girders,and then the number of elements can be significantly reduced.
由于预应力混凝土箱梁中通常存在大量曲线预应力钢筋,提出一种组合单元,并用该单元模拟箱梁中的预应力钢筋,该方法可使结构分析时单元数量大大降低。
6) composite element
组合单元
1.
Through contrastive analysis of calculated value and test data, it is proven feasible and correct to use composite element and externally prestressed element together to analyze externally prestressed concrete structure, while providing support and experience to the numerical simulation in bridge structure.
采用组合单元模拟钢筋混凝土结构,能全面考虑混凝土的开裂、塑性等问题;并推到一种体外预应力单元:在忽略摩擦的情况下,能够考虑体外筋在转向块处的滑移作用,从而对其变形与受力做出更准确的模拟。
2.
To analyze the performance of reinforced concrete structures numerically, the composite element is developed, which inherits and expands the features of the original isoparametric element, and can consider contributions of concrete and steel to the element stiffness separately.
组合单元是一种针对钢筋混凝土结构数值计算而产生的单元形式,是对原有实体等参元的继承和拓展,能够分别考虑混凝土和钢筋各自对单元刚度矩阵的贡献。
3.
Based on the composite element,3D model of concrete creep is created firstly.
以组合单元为基础,建立混凝土徐变的三维计算模型:将结构的变形、内力状态、结构形式及约束情况均沿时间轴进行划分,再根据结构在每个时间点上各参数的变化值,推导出了混凝土徐变计算的递推公式;又基于虚功原理建立混凝土徐变刚度矩阵,绕过应力与应变,直接通过位移增量计算自由徐变应变增量的等效荷载,提高了徐变数值计算精度;组合单元是对原有实体等参元的继承和拓展,能够分别考虑钢筋和混凝土各自对单元刚度矩阵的贡献,而两者又通过自由度变换的方法有机的结合在一起,构成一种可专门用于模拟钢筋混凝土结构的单元形式。
补充资料：单元组合仪表
由若干种具有独立功能的标准单元组成的一套调节仪表。见电动单元组合仪表、气动单元组合仪表。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条