受压

A theoretical analysis is carried out for the load carrying capacity of the axially compressed concrete filled square steel tube.

对方钢管混凝土轴心受压短构件的受力机理进行了理论分析，提出了此类构件承载力计算的基本假定。

The principal of buffer is described as follows.At impulsing down,the piston moves down and vacates the annular space.The pressure in respiratory cavity decreases to a certain level and the traveling valve opens.At that time,the liquids enter into traveling valve and cavity and the plunger is impulsed upward to carry out the gentle transient at the sudden change.When the upward impulsing begins,the respiratory cavity is subjected to pressure and the traveling valve closes.During the gradual pressure rising,the liquids in respiratory cavity effuse from the upper ventage and the sudden change of force-summing direction of plunger is relieved relying on the resistance of ventage.

其原理大致是：下冲程时，活塞向下运动，让出环形空间的体积，呼吸腔内压力下降，下降到一定水平后，游动阀打开，此时，游动阀和小孔同时进液，使柱塞在从上死点处突然改变方向向上运动时得到缓冲，实现了柔和过渡；当上冲程开始时，呼吸腔受压，游动阀关闭，在压力逐渐上升的过程中，呼吸腔内的液体从上部的小孔流出，并依靠小孔的阻力使柱塞受力突然换向得到缓冲。

The current research points out that for the CFCHS joints the linear extrapolation method can be used for chords,whereas the quadratic extrapolation method must be used for braces.The hot spot stress distributions on the CFCHS joints tend to be more uniform and their SCFs become smaller significantly,compared with the CHS joints.Axial tension on the brace puts the CFCHS joints at a disadvantage,which produces higher SCFs than axial compression.The effects of nondimensional geometric parameters β,τ and γ on SCFs of the chords of the CFCHS joints are basically the same as those of the CHS joints,but for the braces,there is a bit difference in the effects of parameters β,τ and γ between the two kinds of joints.Concrete has the function of improving the CFCHS joint rigidity and then decreasing SCFs which is expected to increase fatigue strength,but concrete strength grade does not exert significant influence on SCFs.

研究表明：CFCHS节点的热点应力，对主管可采用线性外推方法，对支管需采用二次外推方法；相比CHS节点，CFCHS节点的热点应力分布趋于均匀，SCF显著减小；CFCHS节点支管轴向受拉比受压不利，SCF增大；CFCHS节点几何参数β，τ，γ对主管SCF的影响效应与CHS节点基本一致，但是对支管SCF的影响效应与CHS节点有些差异；混凝土的作用主要是改善CFCHS节点刚度，从而降低SCF，并预期可提高疲劳强度，但混凝土自身强度等级的高低没有显著影响节点的SCF。

This thesis utilizes the constitutive relationship of the concrete in one way Tension Compression and plain cross supposal It also transplants the basic supposal in Soil Mechanics to the calculation of loading crack , aiming at probing the calculating method of the width of the crack of reinforced concrete component

本文利用单向受拉，受压砼的本构关系和平截面假定，将土力学中的基本假定移植到荷载裂缝的计算中去，从而导出钢筋砼构件裂缝宽度的计算方法。

Waist leg pain and sciatic nerve are painful , receive because of waist leg muscle ligament, tendon membrane and nerve not proper besides put violence or have borne a heavy burdon for a long time, chill wet heat soaks to enter, make its organization tear to raid sprain , oppression or chronic strain, fiber venereal disease changes and agedness degraded venereal disease changes , bone hyperplasia makes its interverbebral disc outstanding, leg joint inflames , is injured position hyperemia, air Zhi blood Yu, oedema, inflammation and adhesion, and deliver spine nerve root and sciatic nerve to receive press pain.

腰腿痛和坐骨神经痛，多因腰腿肌肉韧带、筋膜和神经受不适当的外置暴力或负重过久，风寒湿热浸入，使其组织撕袭扭伤，压迫或慢性劳损，纤维性病变及老年性退化性病变，骨质增生，使其椎间盘突出，腿关节发炎，受伤部位充血，气滞血瘀，水肿，炎症及粘连，而致脊神经根、坐骨神经受压疼痛。

The dashes-in-a-well active region consists of 5 stacks of InAs quantum dashes embedded in compressively strained Al0.20Ga0.16In0.64As quantum wells separated by 30-nm undoped tensile-strained Al0.28Ga0.22In0.50As spacers on both sides of the DWELL.

Dashes-in-a-well 作用区域结构包括了五层受压应变的 AlGaInAs 量子井包覆的砷化铟量子段，外围有30奈米受张力应变的 AlGaInAs 层。

According to the basic principle of self-balanced pile test method and the conversional simplified conversion method , the pile bearing capacity between the equivalent loaded piles and self-balanced piles were compared .

根据自平衡测试法的基本原理，在传统简化转换法的基础上，通过等效受压桩和自平衡试桩上下桩段受力情况的对比分析，研究了负摩阻力对自平衡测试原理的影响，推得了桩承载力和位移的转换公式。

On the basis of shear resisting behavior experiments of the column, the formula model for calculating the shear strength of the column is presented, and the undetermined coefficient in the formula is regressed using the experimental data.

进行了钢管高强混凝土核心轴压短柱的轴心受压试验，研究了其破坏特征、延性和钢混共同工作特性等力学性能，给出了其极限承载力的计算公式。

this paper basis on the current codes,taking axis compressive resistance concrete column bearing capacity formula as constraint condition., taking cost as objective function, taking reinforcement diameter and concrete strength grade as design variables, giving an optimization design, got the best basic parameters which satisfied application conditions,to provide better calculation for the axis compressive resistance concrete colum design.

本文以现行规范为依据，以混凝土强度理论推导出的轴心抗压混凝土柱的承载力计算公式作为约束条件，以造价为目标函数，以混凝土中的钢筋直径、混凝土强度等级为设计变量，对其进行优化设计得到了满足使用条件下的最优基本参数，为轴心受压混凝土柱的设计提供了较好的计算依据。

The stress in tower type of derrick is smaller than the other types of derricks under the combined action of compressive and torsional loads.

与仅受压载荷相比，井架承受压扭联合载荷时，弦杆应力稍有增加，而非弦杆应力有较大的增加。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。