车体联合厂房主要参数结构计算及计算假定的确定

随着技术、经济的发展,钢结构房屋以其自重轻、强度高、制作简便、施工工期短等优点得到越来越广泛的应用。亦有越来越多的设计人员开始接触钢结构设计,本文笔者论述了进行钢结构厂房结构设计时遇到问题,并提出了解决措施。     

加强结构构造措施 提高建筑抗震能力

大地震造成的房屋倒塌及人民群众生命财产损失非常严重。震后房屋倒塌基本情况是:土坯简易房几乎全部倒塌;砖混结构房屋开裂、倾斜、倒塌无数;框架结构则出现裂缝,倒塌较少。作为建筑结构设计工作者,有人认为,设计人员是按现行国家标准抗震设计规范进行设计,只要"小震不坏,大震不     

上海某货运站钢结构设计实例简述

近年来,随着机场物流的不断发展,国内对机场物流货运站的建设需求不断增加。根据机场物流货运站的工艺设备布置特点,结构设计经常采用抽柱钢结构房屋以适应工艺需求。通过上海某货运站工程设计实例,介绍了抽柱单层钢结构房屋结构分析、支撑布置的设计方法,为类似的工程设计积累经验、提供参考。     

我国高层房屋钢结构的发展简况

本文扼要地回顾了我国1985年以来兴建的高层房屋钢结构设计特点,简述了设计高层房屋钢结构的要点和结构设计国产化方面的新进展。     

合肥体育场屋盖中梭形柱设计与抗倒塌分析

合肥体育场屋盖为大型钢结构挑篷,支承于50个梭形柱上,使用ABAQUS程序计算了该结构的极限承载力,弹塑性计算结果表明,梭形柱的极限承载力在规范允许的合理范围。还使用连续倒塌理论计算了结构在某些梭形柱失效后的极限承载能力,计算结果符合设计要求,整个结构设计合理。     

某商务城钢结构建筑雪灾后检测鉴定

2008年中国南方地区普降大雪,导致许多钢结构房屋发生坍塌。对某商务城钢结构建筑在发生雪灾后进行检测与鉴定,根据检测及计算结果分析该结构倒塌原因。     

多层砖混建筑的连续倒塌分析

针对我国北方某地一办公楼的主体部分，一五层砖混建筑在燃气爆炸下发生的横纵和联合连续倒塌实例，本文进行了初步定性分析，解释了其横纵向联合连续倒塌机理，并就其结构设计缺陷进行了讨论，为多层砖混建筑物的抗倒塌设计和对房屋潜在危险源的认识，提供了一些有益建议。]     

防止砌体房屋连续倒塌几点措施

论述了砌体房屋在工程中的抗震设计问题 ,如连续倒塌及结构设计预防措施等     

多层轻型房屋钢结构的设计与应用

在房屋建筑中,结构设计非常重要。结构设计不仅影响建筑的美观性,还对建筑的承载能力与稳固性有着决定性的影响。在多层轻型房屋建设中,钢结构的设计能够发挥良好的作用,实际应用效果很好。文章探究了多层轻型房屋钢结构的设计与应用。     

复杂大跨空间钢结构连续倒塌分析与监测技术研究

复杂大跨空间钢结构具有覆盖面积大、结构冗余程度相对较高的特点,但由于网架与网壳结构设计富余度较小,在极端情况下易出现由某些局部构件失效或局部失稳导致的整体结构失效。综述复杂大跨空间钢结构的连续倒塌机制研究现状与设计方法,结合北京新机场航站楼核心区钢结构屋盖施工过程的抗连续倒塌监测,探讨提升复杂大跨空间钢结构建造过程安全性的方法。     

钢平台结构设计初探

结合工程经验,介绍了钢平台结构的布置及柱与柱间支撑,总结了钢平台结构的设计内容,着重阐述了钢平台结构的设计要点,指出钢平台结构的设计不仅要满足工艺生产的要求,还应满足平台布置、选材及制造安装的合理性。     

The cost of satisfying design requirements on progressive collapse resistance – Investigation based on structural optimisation

This work is concerned with the explicit treatment of progressive collapse resistance within the structural design process. Progressive collapse resistance is associated with the damage tolerance of a structural system and controls the ability of the system to sustain local damage by absorbing the potential of triggering system collapse and suffering disproportionally large consequences. This work focuses on the design of elastoplastic steel frames. The measure of progressive collapse resistance employed is expressed as a ratio comparing the limit loads obtained with elastoplastic analyses of the intact structure and of an artificially damaged structure (‘damage’ is caused by the notional removal of a column from the intact structure). This measure is used to incorporate a constraint on progressive collapse resistance into a structural design optimisation formulation, which – in its classical form – takes only standard design code constraints into account and aims at minimising the structural cost. The developed optimisation approach is capable of producing cost-effective structural designs with acceptable system damage tolerance. By enforcing the satisfaction of the additional design requirement on progressive collapse resistance, structural cost is inevitably increased due to the need for extra material. This increase is quantitatively explored with the presented structural design optimisation approach.     

中广大厦底部钢骨混凝土结构设计

结合兰州中广大厦超限高层框支剪力墙的优化设计 ,探讨了钢骨混凝土组合结构的设计、计算方法 ,并着重介绍了钢骨混凝土柱、钢骨混凝土柱与钢筋混凝土梁之间的节点构造设计 ,可供设计人员参考     

日本阪神地震中的钢结构震害

本文对日本阪神地震中的钢结构震害,包括:罕见的两种破坏现象,厚壁柱子脆断和多层房屋中间层整层被摧毁;以及设计不合理和施工、焊接不良;焊接金属热影响区引起的破坏;大跨度空间结构出现的破坏等方面,作了全面简要介绍,并结合震害实况提供了初步分析。特供我国钢结构同行了解与进一步研究时参考。     

混凝土柱-钢梁混合结构设计分析

通过对混凝土柱-钢梁混合结构的计算和分析,澄清了对此类结构设计模糊不清的几个问题,分析屋面坡度、结构高度、截面尺寸、结构跨度等对结构性能的影响,可供设计人员参考。     

Loss-of-stability induced progressive collapse modes in 3D steel moment frames

This paper deals with the progressive collapse analysis of a tall steel frame following the removal of a corner column according to the alternate load path approach. Several analysis techniques are considered (eigenvalue, material nonlinearities, material and geometric nonlinearities), as well as 2D and 3D modelling of the structural system. It is determined that the collapse mechanism is a loss-of-stability-induced one that can be identified by combining a 3D structural model with an analysis involving both material and geometric nonlinearities. The progressive collapse analysis reveals that after the initial removal of a corner column, its two adjacent columns fail from elastic flexural-torsional buckling at a load lower than the design load. The failure of these two columns is immediately followed by the failure of the next two adjacent columns from elastic flexural–torsional buckling. After the failure of these five columns, the entire structure collapses without the occurrence of any significant plastification. The main contribution is the identification of buckling-induced collapse mechanisms in steel frames involving sequential buckling of multiple columns. This is a type of failure mechanism that has not received appropriate attention because it practically never occurs in properly designed structures without the accidental loss of a column.     

方钢管混凝土结构应用技术研究

方钢管混凝土结构相对于钢筋混凝土结构或钢结构都有着其明显的优点。通过对梁柱组合体试件作了反复荷载试验,验证了其受力可靠性;在浇筑试件的过程中,也对其施工过程作了模拟,最后提出了新型节点的设计建议,介绍了新型节点在实际应用中的施工上步骤。     

精工商务大厦钢结构设计

本文简要介绍了精工商务大厦采用钢框架-混凝土核心筒的混合结构体系,并详细介绍了框架设计、梁柱的结构形式、钢结构节点设计以及钢管混凝土柱和钢梁的防火防腐设计。     

Investigation of the influence of design and material parameters in the progressive collapse analysis of RC structures

This contribution deals with the modelling of reinforced concrete (RC) structures in the context of progressive collapse simulations. One-dimensional nonlinear constitutive laws are used to model the material response of concrete and steel. These constitutive equations are introduced in a layered beam approach, in order to derive physically motivated relationships between generalised stresses and strains at the sectional level. This formulation is used in dynamic progressive collapse simulations to study the structural response of a multi-storey planar frame subjected to a sudden column loss (in the impulsive loading range). Thanks to the versatility of the proposed methodology, various analyses are conducted for varying structural design options and material parameters, as well as progressive collapse modelling options. In particular, the effect of the reinforcement ratio on the structural behaviour is investigated. Regarding the material modelling aspects, the influence of distinct behavioural parameters can be evaluated, such as the ultimate strain in steel and concrete or the potential material strain rate effects on the structural response. Finally, the influence of the column removal time in the sudden column loss approach can also be assessed. Significant differences are observed in terms of progressive failure patterns for the considered parametric variations.     

多层轻钢结构框架设计

对轻钢框架结构适用范围、主要优点、材料选型和设计中的注重点均作了扼要介绍和总结，对结构构件的电算结果进行了分析，解决了节点设计中粱柱连接的问题，并指出轻钢框架结构有更好的应用前景。