压屈

冷弯薄壁槽型钢腹板局部压屈的有限元模拟

Finite element modeling of cold-formed channels subjected to web crippling

考虑桩周土摩阻力的细长桩压屈荷载

Buckling Loads of Slim Piles Considering Side Friction of Soil

系列数值分析表明影响槽钢腹板压屈的主要参数是腹板的厚度、屈服强度、槽钢的内角半径。

The parameters affecting the web crippling capacity are researched through a series of numerical test specimens .

冷弯薄壁槽钢腹板压屈及弯压有限元分析和设计

Finite Element Analysis and Design of Cold-Formed Thin-Waled Steel Channels Subjected to Web Crippling and Combined Bending

考虑横向剪切效应时圆柱型正交各向异性球面扁壳在横向载荷作用下的非线性压屈

Nonlinear buckling considering the effect of transverse shear deformation of cylindrically orthotropic spherical shallow shells under transverse load

加肋焊接空心球破坏模式为钢管的强度破坏，并非球体的压屈破坏。

Welding hollow balls with stiffener failure mode is the strength of pipe , not the sphere buckling damage .

腹板压屈是冷弯薄壁钢构件在横向集中荷载或支承反力作用下所发生的一种局部屈曲形式，也是导致其承载力丧失的主要原因。

Web crippling is the main reason to result in the lost of the ultimate load-carrying capacity of cold-formed thin walled members .

本文介绍了一种用固定度法设计变截面砼柱的方法。该方法不必采用有效长度系数，也不必计算柱子的临界压屈荷载。

Variable cross-section column design with fixation ratio method will not adopt effective length coefficient and not calculate critical compressive yielding load .

压屈载荷的等值线图可以清晰地描述任意双分层损伤层合梁的压屈载荷随分层位置的变化规律。

The variable regularity of buckling loads of double delaminated beam can be clearly explained from the isoline figure in this paper .

三维空间中的等周不等式桩的压屈稳定性受到桩周土体约束等多种因素的影响。

There are many factors , such as the restriction of the soil around the pile , affecting pressing-yield-stability of the pile .

对薄壁钢结构抗震能力的合理评估需要考虑局部压屈和便于实际工程应用。

A rational evaluation ductility method for thin-walled steel structure is required to account for local buckling and to be convenient for practical use .

在膜结构工程中，由于结构方案的不合理，容易形成工程质量问题。一般表现为，膜材局部应力过大造成局部撕裂，或者局部钢构件由于压屈而造成失稳破坏。

Owning to the local stress of the membrane and the buckling deformation of the steel members , some accidents often occur in the membrane construction .

结果表明中国钢结构规范受弯梁局部受压的设计公式用于冷弯薄壁槽钢腹板压屈设计是偏于不安全的。

It is demonstrated that the current code design formula for beams under patch load is generally unconservative to design the cold-formed steel channels subjected to web crippling .

引用国际上最新的试验研究，本文对冷弯薄壁非卷边槽钢承受集中荷载时腹板压屈进行了研究。

Based on the experimental study on the cold-formed steel unlipped channels under concentrated bearing load , the feasibility about Perry formula applied in cold-formed steel structures is analyzed .

进一步分析表明，桩身初始弯曲将降低桩身压屈稳定承载力，而桩周摩阻力的存在使得桩身压屈稳定承载力有所提高。

It proves by more analysis that the initial curve will depress the critical load of the pile under pressing , while , the frictional resistance around pile will increase it .

这些原因包括软粘土侧压力、沉桩引起的挤土效应和超孔隙水压力、桩身负摩阻力和桩的压屈。

These reasons include lateral pressure of soft clay , influence of compaction of soil and excess pore-water pressure during pile driving , negative friction of piles and pressure yield of pile .

由全文的分析可以看出，非线性有限元方法是分析冷弯薄壁槽钢腹板压屈、纯弯和弯压共同作用行为的一种省时、有效的方法。

As a result , it is demonstrated that the nonlinear finite element method is an effective and time efficient way to analyze the structural behavior of cold-formed thin-walled steel channels subjected to web crippling , pure bending and combined bending and web crippling .

六指六穴点压及膝关节旋转屈伸手法治疗膝骨关节炎的多中心临床实验

Multi-center clinical research on six finger to six point and rotation and stretching manipulation in treating knee osteoarthritis

目的：观察六指六穴点压及膝关节旋转屈伸手法治疗膝骨关节炎的临床疗效，并与杜宁手法对比。

AIM : To observe the clinical therapeutic effect of six finger to six point and rotation and stretching manipulation in treating knee osteoarthritis , and compare it with Du Ning 's manipulation .