上梁

Finite element model of light-weight steel-concrete composite beams are built up. This element model combines spring element with traditional beam element to form a composite beam element which consists of steel, concrete and springs. The three parts has compatibility of deformation.

2建立了轻钢-混凝土组合梁的非线性有限元分析模型，该模型由传统的梁单元中加入弹簧单元，由钢梁部分、混凝土部分和弹簧三部分在变形协调的基础上组成一个复合梁单元。

A Material nonlinear finite element analysis for the cast-in-place reinforced concrete hollow slab that occurs from initial loading, cracking, yielding to failing is carried on. The cracking load, ultimate load, the displacement rules and the principal stress distribution rules of the hollow slab under the vertical loads are obtained. A Material nonlinear finite element analysis for the single span hollow flat-plate floor is also carried on. The function of the concealed wide-flat beams is definite by analyzing the principal stress distribution diagram. The calculating results verify the theoretical analysis and give some important conclusions which are great useful to improve the constructing of the new flat-plate floor.

其次对空心板进行了从加荷、开裂、屈服直至破坏的全过程材料非线性有限元计算，得到了空心板在竖向荷载作用下的开裂荷载、极限荷载及位移和应力分布规律；还对单跨无梁楼盖进行了材料非线性有限元计算，通过分析主应力场明确了柱上暗扁梁的作用；有限元计算的结果验证了以上的理论分析并得到了一些重要的结论，对改进现浇空心板无梁楼盖的构造措施有重要的参考价值。

This reflects that under the influence of dominant northwest wind, the primary ridges have the surface processes of transverse dunes.

副梁在主梁迎风坡上发育、侧向摆动和延伸，形成分、割主、副梁沉积的二级界面。

In this paper, according to the construction technique features of the main girder of Yamen Bridge, the process of construction with the guyed traveler is established and the issues regarding the selection of the guy construction schemes and de...

根据崖门大桥主梁施工工艺的特点，建立了牵索挂篮施工模拟计算的流程，并对牵索方案的选择以及主梁立模标高的确定等问题进行了探讨。在此基础上，给出了崖门大桥主梁的施工流程及其计算结果。

The curve continual steel box Liang shearing force stagnates the effect finite element analysis box section Liang has the big flexural rigidity and torsional stiffness, the stress performance good, spanning ability big, on the bridge the field of vision open and so on the merits, is in the bridge design the commonly used structural style, when receives under the dead load or the symmetrical live load function winding, because the lifting surface detrusion causes its bending stress to present the non-uniform distribution condition along the Liang width direction, this phenomenon is called "the shearing force to stagnate the effect".

曲线连续钢箱梁剪力滞效应的有限元分析箱形截面梁具有较大的抗弯刚度和抗扭刚度、受力性能好、跨越能力大、桥上视野开阔等优点，是桥梁设计中常用的结构形式，在受恒载或对称活荷载作用下挠曲时，由于翼板的剪切变形致使其弯曲应力沿梁宽度方向呈现不均匀分布状态，此现象称为&剪力滞效应&。

Starting from the basic concept and principle of reliability theory, some methods of reliability analysis and calculation for structural members and systems are discussed in seme detail m this paper, On the basis of others'research achieements , the method for calculating the reliabillity of continuous PPC girder bridge system is deduced from the probability of failure,In accordance with the test resuIts of 14 two-span continuous PPC model beams , obtained from the rescarch project,A study on the plastic ...

本文从可靠度理论的基本概念和原理出发，主要论述了结构杆件和系统可靠性分析和计算方法。在前人研究的基础上，利用失效概率推导出连续梁系统可靠指标的计算方法，本文还根据高等学校博士学科点专项科研基金资助项目《大跨度预应力混凝土桥塑性行为的研究》所进行的十四片两跨混凝土连续梁桥模型试验的数据算出各梁承载能力的系统可靠指标。

No difference were found in all dose Epimedium total flavonoids groups,percent of bone trabecula area and number of bone trabecula showed increasing pattern and resolving powder of bone trabecula showed decreasing pattern.

淫羊藿总黄酮三个剂量组之间没有差异，但在骨小梁面积百分数、骨小梁数量上有上升的趋势，骨小梁分离度则有下降的趋势。

4Have done a great deal of research work, while on the stiffened ones, Wanget al. [5, 6, 7] have also done a series of research work. But up to now, tothe author's best knowledge, there have been no papers reported in the openliterature on the stability analysis of the laminated composite shells of revo-lution, both unstiffened and stiffened, by the finite element method.

在SABA族元素[1]的基础上，把复合材料各向异性的弹性性质考虑进去，把纵向筋条处理成为空间梁，计入梁偏心的影响，由梁的基本弹性和几何刚度矩阵出发，经过一系列变换，推导出与SABA元素相协调的新的弹性和几何刚度矩阵，从而较为精确地得到了复合材料叠层及加筋的稳定性分析结果。

On the basis of experimental research,through compartmentalizing experimental beams into plenty of tiny cell,according to constitutive equation of each materials including steel bar,concrete,CFRP, this paper presents numerical simulation study of flexural all course of RC beams strengthened with CFRP, the theoretical results agree closely with those of the test.

在试验研究的基础上，将CFRP加固钢筋混凝土梁划分为若干个微单元，根据组成CFRP加固钢筋混凝土梁各材料的本构关系，通过数值方法，实现了对碳纤维布加固钢筋混凝土梁受弯全过程的数值模拟，其计算结果与试验所测得的结果符合较好。

Results After 3 months of kidney radiation by 15 Gy of Cs137 γ-rays, the changes with kidney shrank, Bowman's capsules straitened or disappeared, glomerular swelled, some epithelia denaturalized or died were observed. Mitochondria tumefied and the cristae shortened, lessened and disordered. Urine β2-MP rose evidently. It was lowered significantly the renal 25-OH-D-1α-hydroxylase activity and its mRNA expression. The dry and ash weight, BMD of femur and lumbar were significantly reduced, volume and width of bone trabecula were distinctly decreased and the space increased in model group. The Pyd / Cr increased and ALP decreased as well.

结果 15Gy 137Cs-γ射线肾局部照射3个月后肾脏体积缩小，肾小球肿大，Bowman氏囊囊腔狭窄甚至消失，部分肾小管上皮细胞变性、坏死，线粒体肿胀，体积增大，线粒体嵴变短、减少、排列紊乱；尿β2-MP显著增加；肾1α羟化酶活性及1α羟化酶mRNA基因表达量明显下降；肾辐射组股骨干重、灰重、腰椎和股骨BMD明显降低；骨小梁体积和骨小梁宽度减少，骨小梁间距增加，MAR减小；腰椎压缩和股骨三点弯最大载荷明显降低，Pyd / Cr值明显增加，ALP显著降低。

Objective: To study the effect of polycythemia on blood oxygen saturation.

裴蕾目的：观察RBC剧增而引起的高粘血症对血氧饱和度的影响。

Based on SIMPLER algorithm in the curvilinear body-fitted coordinates, the calculations were performed for Pr=0.7, Re=10~1000 on non-orthogonal non-staggered grids which are generated by elliptic equation systems.

采用曲线坐标系下压力与速度耦合的SIMPLER算法，数值研究了周期性渐扩渐缩波纹通道内脉动流动与换热情况，流动Re数的范围为10~1000，Pr数为0.7。