In active code for design of steel structures , axially compressed members are calculated not as torsional - flexural buckling but as flexural buckling with equivalent slenderness ratio , residual stress and initial geometry imperfection are also taken into account as flexural buckling 我国现行钢结构设计规范( gb50017 )采用换算长细比的方法将弯扭失稳等效为弯曲失稳，其残余应力和初始几何缺陷均按弯曲失稳考虑。
Frame - bracing structure is a kind of dual - system , among which the bracing system may be shear wall , reinforced concrete core , vertical truss , etc . in current design codes for steel structures , multi - story steel frames are divided into two types , sway and non - sway frames 支撑体系可以是剪力墙、筒体或支撑桁架体系。国家现行的钢结构设计标准在计算框架结构的稳定性时将框架结构分为有侧移和无侧移两类，分别确定其计算长度。
The applicability of present code for design of steel structures ( gbj17 - 88 ) is calculated and analyzed by monte carlo finite element method and traditional first order reliability method . it is approved that the monte carlo finite element method is right 分别采用蒙特卡罗（ montecarlo ）有限元法和传统的一次二阶矩法（ form ）对现行《钢结构设计规范》 （ gbj17 - 88 ）的适用性进行了计算和对比分析，从而证实了蒙特卡罗（ montecarlo ）有限元法的正确性。
The design methods to composite beams in the steel structure design specification ( gbj17 - 88 ) have been established following the foreign countries mainly , they do n ' t consider slip effect , such simplification is not safe enough for composite beams especially for composite beams with partial shear connection 我国《钢结构设计规范》 （ gbj17 ? 88 ）中关于组合梁的设计方法基本上是沿袭国外的方法，不考虑组合梁的滑移效应，这些简化对于组合梁尤其是部分剪力连接组合梁是偏于不安全的。
During the transverse analysis , as the discussion of frame bracing condition that exists in the new vision < code for design of steel structures > gb50017 - 2002 has been lead into the stability analysis of staggered truss system , the concept of strong and weak bracing staggered truss system , and the concrete dividing standard are also given , so that makes the staggered truss stable theory have a good link with the new code , and provide theory guarantee for designers 横向分析时将我国新修订的《钢结构设计规范》 gb50017 - 2002中，关于框架体系支撑条件的论述引入到错列桁架的稳定分析中，提出了强支撑错列桁架体系和弱支撑错列桁架体系的概念以及具体的划分标准，使得错列桁架的稳定分析可以与新规范很好的对接，为设计人员的使用提供了理论保障。
In our country , the application of multi - story steel structure housing is not broad now , the relevant regulations and examples are also few , and people think the cost is expensive . for this , in this paper , a computer - based method is presented for optimal design of multi - story lightweight framework 多层房屋钢结构体系在我国住宅领域的应用目前还处在初级阶段，现行国家规范涉及轻钢结构设计的还不多，相应的示范工程也很少，另外人们普遍认为轻钢结构房屋造价偏高，这就使得其推广受到限制。
This thesis points out a theoretical and experimental analysis of the ultimate load - carrying capacity and deformation of the un - braced ideal steel frames . it evaluates the practicality of the book code for design of steel structure ( gb 50017 - 2003 ) in analysis the internal force of steel frames , and gives some suggestion on the structure analysis and design of steel frame 本文对理想钢框架的极限承载力和变形进行了理论与试验两方面的系统分析，评估了新的《钢结构设计规范》 ( gb50017 - 2003 )关于钢框架结构内力分析条文的适用条件，为钢框架的结构分析和设计提出了一些建议。
The present findings of nonlinear research in frame structures , and the methods for design of second - order effect in the codes from china and other countries , were briefly introduced in this paper . the contents and methods of design and calculating about second - order effect in gb50017 - 2003 were discussed as well . a rotational displacement equation for geometric nonlinear structures was derived , and then a nonlinear finite element program for rigid frames was compiled by fortran 本文简要地介绍了框架结构非线性研究的现状以及各国规范对框架二阶效应的设计内容和方法；对我国《钢结构设计规范》 gb50017 - 2003给出的考虑框架结构二阶效应的方法进行了探讨；推导了基于几何非线性框架的转角位移方程，在此理论基础上用fortran语言编制了刚性框架二阶内力分析的有限元计算程序，并用此结构分析程序对多种框架进行了一阶和二阶的弹性分析，讨论了二阶效应在框架分析中不应忽略的原因，同时分析了影响框架二阶效应的因素。
The natural vibration spectrum curve is measured and the critical velocity to induce trashrack bar galloping is calculated . the effect of bar spacing on the bar strain and the characteristics of the exciting force are discussed . by fatigue analysis it is obtained that the service life of weld at the fixed end of the bar is about 13 分析了发电工况和抽水工况时的振源特性，讨论了栅条净距对栅条应变的影响，按钢结构设计规范对栅条进行了疲劳计算， 1 ~ #测点处可视为不会发生疲劳破坏， 2 ~ #测点焊接处的疲劳寿命约为13 . 6年。
