共查询到20条相似文献,搜索用时 234 毫秒
1.
2.
3.
本文介绍了一种单管塔的简易计算方法,采用自己编制的程序,可以简捷、准确地得到计算结果,用于单管塔的设计和计算。 相似文献
4.
5.
鉴于采用有限元软件模拟计算单管塔的顶点位移能得到精确的结果,但其计算过程较复杂,提出了一种单管塔顶点位移的快速计算方法,采用EXCEL表格编辑并拉公式,可以快速得到单管塔的顶点位移,算例结果表明,快速计算方法与有限元计算结果相比误差很小,说明使用该方法计算单管塔顶点位移是可行的。 相似文献
6.
7.
8.
9.
10.
11.
现今,负载下焊接增大截面加固钢结构构件的方法在加固工程中的应用已经非常普遍,但是关于这方面的研究很少.目前除了前苏联的《改建企业钢结构加固计算建议》,只有中国有两个钢结构加固技术的规范或规程,即CECS 77∶ 96《钢结构加固技术规范》和YB 9257-96《钢结构检测评定及加固技术规程》.本文将对这两本规范或规程中关于增大截面法加固钢构件的设计方法进行分析比较,并结合相关的实例分析,对计算结果进行分析比较,同时找出已有规范的差异与不足,为今后的研究和规范修订提供参考和科学依据. 相似文献
12.
通过两个基坑支护结构设计实例 ,介绍了在深厚淤泥中进行支护结构选型时水泥搅拌桩和微型钢管桩的应用 ,详细阐述了支护结构的设计思路和设计方法 ,以及在选型过程中应注意的问题 相似文献
13.
有很多复杂的分析方法可预测单层多跨钢框架的几何非线性和钢构件的材料非线性影响。然而,一些结构工程师在理解这些复杂的方法以及应用在钢结构设计上存在困难。因此,提供了简化的分析模型,用于初步设计阶段。采用简化的分析模型,结构工程师能够容易地预测层间位移、最大允许荷载,单层多跨钢框架支撑的刚度。通过二维的有限元分析验证了简化模型应用的可行性。 相似文献
14.
15.
Many complicated analytical methods have been proposed to predict the effects of the geometric nonlinearity of a single-story multi-bay steel frame and the material nonlinearity of its steel members. However, some structural engineers have difficulty in understanding the complicated methods and applying them in designing steel structures. Therefore, this study has been performed to provide a simplified analytical model that is only applicable in the preliminary design stage. Using the simplified analytical model, structural engineers can easily predict the storey drift, maximum allowable loads, and bracing stiffness of a single-storey multi-bay steel frame. The application feasibility of the simplified model is verified by performing a two-dimensional finite element analysis. 相似文献
16.
The length of the critical region is one of the essential parameters in designing earthquake resistant structures where adequate transverse steel needs to be provided to confine the concrete core and subsequently to avert brittle failure under large inelastic deformation/curvature. In countries having high seismic risk such as China, Japan, New Zealand, USA etc.; guidelines have been provided in their reinforced concrete (RC) design codes for the design of fully ductile RC columns/piers. Nevertheless, in countries having low to moderate seismic risks, RC columns/piers can be designed for limited ductility, the design guidelines for which are very scarce. From the experimental tests carried out by the authors on limited ductility high-strength RC columns, it was found that this type of column/pier can be confined effectively with less confinement steel over a shorter extent of critical region compared with the existing code provisions for ductile columns/piers. In this paper, the length of the critical region in which the properly enhanced amount of confinement steel should be installed is investigated by two methods, which are denoted as direct methods in this paper. The evaluated critical region lengths have also been compared with those obtained by other researchers and the New Zealand Code. 相似文献
17.
18.
该文以同时考虑端部钢筋和腹部分布钢筋作用的偏心受压正截面承载能力设计表达式[1]为基础,给出一种计算井塔墙肢正截面承载能力的较简易的方法,是以效应组合的轴力N,作为极限状态轴力,求相应的弯矩承载能力MN。连梁承载能力计算,是这个方法的一种特殊情况。文中在叙述一般方法后,给出了两个工程算例。 相似文献
19.
20.
防屈曲开缝钢板墙是一种新型的抗侧力构件,除具有一般钢板墙的特点外,还具有塑性性能好、滞回特性稳定以及可以独立地变化墙板承载力和刚度等优点。目前,有学者针对该结构体系提出基于性能设计的能力设计法和能力准则法,采用上述理论以及日本被动减震结构的设计方法(性能需求法),对1榀6层3跨的防屈曲开缝钢板墙结构算例进行了分析,比较研究了3种方法对结构性能的影响。计算结果表明:对于能力设计法,适当提高墙板的设计屈服位移,可以有效地增大结构的延性;能力准则法需要多次试算,结构性能指标不易控制,通过承载力控制设计墙板屈服位移,耗能效率较高;性能需求法得到的结构延性最好,但用钢量较大,应用于防屈曲开缝钢板墙设计,尚需解决框架梁设计、墙板屈服位移取值等问题。 相似文献