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Two hysteretic models suitable for damaged and undamaged fiber-reinforced prestressed wide-beam frames were proposed sequentially. The hysteretic models consisted of a skeleton curves which based on the concept of three stage polygonal line with soften region and some hysteretic rules.

在上述研究的基础上，分析了无损伤和地震损伤的钢纤维预应力扁梁框架滞回曲线的主要特征，进而分别提出了适合于无损伤和地震损伤的钢纤维无粘结预应力扁梁框架结构的恢复力模型。

The center pontoon models of ribbon pontoon bridge type 79A were taken as experimental objects, which were made in proportion to 1∶4 with fiber reinforced plastics/steel composite structure by hand lay up moulding process.

以我军现装备的79A带式舟桥为原型，以采用手糊成型工艺制作的按1∶4比例缩小的玻璃钢/钢复合结构的方舟模型为研究对象，采用"三弦梁"理论对模型的承载能力进行了计算。

Mechanical properties and durability of ceramic fibre reinforced portland cement composites were studied.

研究了陶瓷纤维增强普通硅酸盐水泥基复合材料的力学性能及耐久性。

Joining of carbon fiber reinforced SiC composite to itself was realized via preceramic silicone polysilazane with aluminium nanopowders as joining materials.

摘 要：采用陶瓷先驱体转化法连接Cf/SiC复合材料。

Fick's second law was always used to describe the diffusion properties of chloride in the concrete. For the application of Fick's second law in the prediction of the service life of reinforced concrete structures, many researchers have already made studies on this issue.

Fick第二定律通常被用来描述氯离子在混凝土中的扩散性质，对於Fick第二定律在钢筋混凝土结构寿命预测的应用，已经有许多学者对其进行了研究。

Thus,it is an effective way for our prefabricate part industry to develop high ef-fective pre-stressed reinforced concrete hollow slab so as to go out of the depress.

因此，依靠技术进步，发展高效预应力空心板是适应我国预制构件行业走出困境的一条行之有效的途径。

Principal Element ; Trace Element ; X-ray Fluoressence SpectroMetric Analysis ; Absorption Reinforced Effect

主元素；微量元素； x-射线荧光光谱分析；吸收—增强效应

Based on the variational principle of virtual voltage and virtual displacement derived in this thesis and the classical theory of linear laminated plates, and by using the constitutive equations of elastic piezoelectric materials, and the DKQ quadrilateral plate bending element, the finite element modeling for the fabric reinforced laminated plates with nonlinear voltage-electric strain relationship of piezoelectric actuators has been established for the first time in this thesis. And the expressions for the electric loadings with obvious mechanical meaning and convenient for computation are established, which can be used to the deformation analysis of laminated plates with piezoelectric actuators under specified voltages.

以本文直接导出的压电结构的虚电势—虚位移变分原理为基础，依据经典线性层合板理论和压电弹性体的本构方程，采用基于离散法线假设的DKQ四结点任意四边形薄板弯曲单元，首次建立了考虑非线性电压—电应变关系的含压电致动器的纤维增强型层合板的有限元分析模型，并推导建立了力学意义明确、便于计算的电荷载表达式，可用于指定电压条件下纤维增强型叠层合成板的变形分析。

As the basic work of Accounting has been reinforced, computer is used more and more largely in Accounting Estimate and Financial Administrate,and causes a propound change in the method of accounting and administration.

随着会计基础工作的加强，电子计算机日益深入地应用于会计核算和财务管理中。这使会计核算手段、管理方法都有了深刻的变化。

This has now been reinforced by data from Lunar Prospector .

这已经加强了数据的月球勘探者。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。