1) chemically prestressed
化学预应力
2) chemically prestressed concrete filled steel tube
化学预应力钢管混凝土
1.
The bearing capacity of chemically prestressed concrete filled steel tube is compared wite that of ordinary concrete filled steel tube at different curing ages.
研究提高约束膨胀混凝土自应力水平的延迟膨胀机理和实施实例的化学预应力钢管混凝土,结果表明自应力水平可高于21MPa。
3) optimal prestress design
预应力优化
1.
Selfstress mode analysis and optimal prestress design of cable-strut tension structures;
索杆张力结构自应力模态分析及预应力优化
2.
Taking the minimum initial-strain of the structure as the objective function of the optimal prestress design and the minimum light of the structure as the .
以初始应变能最小为预应力优化目标和重量最轻为截面优化目标进行了优化设计,获得了合理的初始预应力分布和截面大小。
4) prestress optimization
预应力优化
1.
a spatial cable-truss tensile structure with an annular plane and complex geometric topology,a new method of prestress optimization using object-selection optimization was proposed.
针对多自应力模态与机构位移模态索杆张力结构可行预应力分布求解的最复杂情形,为得到一种具有一定普遍意义的预应力优化求解策略,以该结构体系的一种新形式——大跨度环形平面空间索桁张力结构为基础,考虑其几何拓扑形式多样的特点,应用结构平衡矩阵理论与代数奇异值分解算法,通过对结构模态矩阵的分解变换及其组合运算,提出了一种可依据结构预应力分布的不同优化目标进行求解的新方法——目标选择优化法,使多自应力模态索杆张力结构体系的可行预应力分布求解工作得以便捷的实现。
2.
In order to promote the application of this kind of structure to practical engineering, this article carried out deep study on prestress optimization,adjustment on defect state,effect of friction in sliding-cable during tension construction,design of new joints and model experiment in the suspen-dome system.
首先,本文建立了弦支穹顶结构预应力优化数学模型,运用NSGA-Ⅱ优化算法,以各圈环索预应力水平为变量,以各圈环索总预应力水平最低、结构水平径向支反力最小、上部单层网壳杆件轴向应力峰值最小为目标函数,考虑结构强度和挠度限制,对弦支穹顶结构的预应力水平进行多目标优化。
5) prestress variation
预应力变化
1.
Although the anchor cable is widely used in the geotechnical projects,the prestress variation rules of the anchor cables are still not clear,especially the prestress loss when being locked and lasting of prestress variation of cable in cracked rock are interesting issues.
在综合分析锚索预应力阶段变化特点的基础上,将影响锚索预应力变化的因素归结为可补救、长期作用和周期波动三类,并分别进行了定量和定性分析。
6) stress chemistry
应力化学
1.
According to stress nature, stress chemistry may be divided mainly into four types: tensile, compressive, shear and rotation-shear stress chemistry.
应力化学是研究应力的性质、作用方式和规模、组合和序列,它们的发生、发展、演化所成生的化学作用和过程,以及物理—化学动态机制。
补充资料：工程化学障碍物(见化学障碍物)
工程化学障碍物(见化学障碍物)
engineering-chemical obstacle
习U·上日、11匕I一9 nuQXue Zhang’aiwu工程化学障碍物(engineelsng一ehemiealobstacle)见化学障碍物。
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