新规范中偏心受压构件正截面承载力计算

本文介绍了新规范中关于偏心受压构件正截面承载力计算的若干条款,并且与原89规范、美国规范、欧洲规范等进行了一定程度的对比,结果说明新规范是一本符合目前我国国情并具有相当准确性的规范,能够为设计人员提供有效、简便的参考与约束。     

中欧结构规范中主要设计指标异同的辨析

介绍了中国和欧洲结构规范及设计基本原则中,主要设计指标部分的共同点和差异,主要内容包括:设计使用年限、设计基准期、重现期、耐久性、结构重要性等级和质量控制等。指出了使用欧洲规范时应重点注意的问题,为国内结构工程师理解欧洲规范的基本概念和设计原则,应用欧洲规范进行工程设计提供一定的帮助。     

钢纤维混凝土管片抗剪承载力设计方法研究

通过实际算例详细介绍了我国和欧洲规范关于钢纤维混凝土结构构件抗剪承载力的设计方法。计算结果表明:和欧洲规范设计理论不同,应用我国规范设计方法进行管片抗剪承载力设计,主要是考虑混凝土的抗剪承载力,并没有考虑纵向钢筋对斜裂缝的控制作用,在一定条件下,我国结算结果保守;考虑钢纤维影响,当截面内力较小时,按我国规范计算钢纤维混凝土管片斜截面增加的抗剪承载力比欧洲规范计算结果至少40%左右。因此,建议针对应用我国规范进行钢筋钢纤维混凝土管片抗剪承载力设计的相关内容应作相应调整。本研究可为优化我国钢纤维预制盾构管片的抗剪承载力设计提供参考。     

中欧结构规范中作用和设计状态异同的辨析

着重介绍了中国和欧洲结构规范中设计基本原则部分的共同点和差异,主要内容包括:作用及作用效应、设计状态、极限状态、分项系数法等。指出了使用欧洲规范时应重点注意的问题,为国内结构工程师理解欧洲规范的基本概念和设计原则,应用欧洲规范进行工程设计提供一定的帮助。     

欧洲岩土工程设计规范Eurocode7简介

基于极限状态设计的欧洲岩土工程设计规范包含了几乎所有欧洲国家最新的信息和最顶尖专家的意见,代表了当前的最高水平。它的出现极大地促进了欧盟内部的技术交流,影响着世界各国的岩土工程设计理念与规范。为了增加对欧洲规范的了解,简要介绍了欧洲规范的发展过程和岩土工程设计规范的特点。     

国外规范中抗倒塌设计方法与评价

我国结构设计规范中目前缺乏建筑抗连续倒塌设计方法,为此,简单介绍了国外几本规范(欧洲Eurocode1.7、英国British Standard、美国GSA 2003和DoD 2005)中抗连续倒塌设计思想和方法,对规范中的概念设计措施、拉结强度法、替代荷载传递路径法以及关键构件设计法进行了评述,指出这些方法存在的一些不足。最后,对在我国开展相关研究给出了建议。     

中欧规范关于双向偏心受压构件计算方法的对比

我国规范与欧洲规范针对双向偏心受力构件的计算要求,在计算方法上有较大不同,由此对计算结果也产生影响。故详细介绍了我国规范GB50007[1]与欧洲规范EN1992[2]有关理论背景,对影响双向偏心受力构件计算结果的因素进行了对比分析,并结合算例对两种规范的配筋计算结果进行了详细对比。分析结果表明,中欧规范在屈服理论,验算方法等方面的规定存在一定差异,反映出中欧规范在双向偏心受力构件影响因素方面存在不同考虑及机理认识上的差异,这些差异使由此计算所得到的构件配筋设计有所不同,欧洲规范方法更为保守。     

各国规范关于结构地震下抗扭设计方法的对比

介绍了在地震作用下引起结构扭转振动的主要原因 ,对比了我国新旧建筑抗震设计规范以及美国、欧洲等抗震规范关于扭转效应计算以及抗扭设计的有关规定 ,从而为全面了解各国规范结构的抗震设计现状 ,进一步研究结构的扭转效应奠定基础     

浅析欧洲规范的截面分类

截面分类是运用欧洲规范进行钢桥或钢-混凝土组合梁桥设计的重要部分。介绍欧洲规范截面分类的原则、方法,给出Loukouni大桥及Djoué大桥的设计过程中截面分类的示例,并对截面分类的目的进行探讨。有助于工程技术人员理解欧洲规范截面分类的内容,从而熟练地运用欧洲规范进行钢桥及钢-混凝土组合梁桥的设计。     

欧洲标准桥梁设计简介

阿尔及利亚东西高速公路采用的是法国规范和欧洲标准,工程设计严格遵守质量保证计划。桥梁设计必须执行欧洲标准,使用的材料和设计荷载等方面与国内有显著的差别,尤其在桥梁抗震设计思路上。本文着重介绍欧洲标准桥梁设计的一般方法,主要研究桥梁设计采用的材料性能、设计荷载以及满足欧洲标准的桥梁抗震设计。     

欧洲规范Eurocodes创新及对施工的影响解析

欧洲规范体系Eurocodes凝聚了当前先进的设计理念（包括结构的鲁棒性、设计使用年限与耐久性等），具有前瞻性。除了指导土木工程设计，可以预期Eurocodes还将对工程施工、建造产生积极推动作用。探讨Eurocodes当中的领先概念以及相应的条款对今后工程施工的要求，围绕该规范体系未来拓展的重点方向（如将可持续建设标准化），解析它对施工技术与管理的影响和预期，以期为我国建筑业发展与国际化提供借鉴。     

Hintergründe und Ziele der Eurocodes – transparent gemacht

Objectives and background of the Eurocodes. Globalisation requires International Standard Families to avoid problems of incompatibility between national codes for users. The Eurocodes are part of the International Standard Family offered by the EU prepared by CEN for the design of works and prefabricated components for products and for testing. This preparation is based on principles that effect a sustainable standard system with sufficient stability and flexibility for continuous updating to be internationally accepted. These principles and requirements, in particular the requirement to base the design rules on statistical evaluations of large scale tests, and their effects on the consistency and simplicity of the rules for steel structures are highlighted and results are given for some examples. It is important that the Eurocodes after all preparations to accustom the users to the new rules are implemented in Germany as soon as possible to avoid inconvenience from parallel codes in the transition phase.     

Design basis of Lithuanian steel and aluminium structure codes and their relations to Eurocode

The background in the development of national building technical regulations for the design of steel and aluminium structures is discussed. National Design Standards are under consideration in comparison with the main concepts of EC3 and EC9. Standard features of design parameters of materials, partial safety factors and metallic cross-sections are considered in this article. The resistance criterion of members in combined compression and bending is analysed. The effect of member slenderness and fillet weld connections on design results given by National technical regulations and Eurocodes is illustrated.     

Seismic response of Cfs strap-braced stud walls: Theoretical study

The use of cold-formed steel (CFS) profiles in low-rise residential buildings has increased in European construction sector. The reason of this interest is related to potentialities offered by this constructive system, which are the high structural performance, lightness, short construction time, durability and eco-efficiency. Nevertheless, the current structural codes, such as Eurocodes, do not provide enough information about the seismic design of this structural typology. In an effort to investigate the seismic response of CFS structures, a theoretical and experimental research has been carried out at University of Naples Federico II, with the main aim to support the spreading of these systems in seismic areas. This study focuses on an “all-steel design” solution in which strap-braced stud walls are the main lateral resisting system. In the present paper the outcomes of theoretical phase are shown with the aim of defining the criteria for the seismic design of such structures. In particular, a critical analysis of the requirements for CFS systems provided by the American code AISI S213 has been carried out by comparing it with those given by Eurocodes for traditional braced steel frames.     

Lap shear tests of bolted and screwed ferritic stainless steel connections

The development of design guidance for stainless steel structures requires more tests on ferritic grade connections. This paper deals with a series of lap shear tests which have been carried out on various configurations of bolted and screwed connections. The tests demonstrate net section failure, bearing failure and block tearing failure. The material is a ferritic stainless steel of grade 1.4509 (AISI 441) with a thickness of 0.5–4.5 mm. The results are utilized in developing design guidance in accordance with Eurocodes.     

螺纹孔单边螺栓T形连接节点受拉性能研究(Ⅱ)——承载力设计方法

欧洲规范给出了螺栓连接T形节点的3种受拉破坏模式,考虑到螺纹破坏,又划分了2种新的破坏模式:螺纹破坏和T形翼缘屈服伴随螺纹破坏,并给出了相应的抗拉承载力计算公式。将公式计算结果与单边螺栓T形连接节点受拉性能试验结果进行比较,验证了提出的新的破坏模式以及计算公式的正确性。公式计算结果均小于试验结果,因此在由计算公式得到的设计荷载下,T形节点具有足够的安全储备。     

Schutzzielorientierte brandschutztechnische Bemessung für mehrgeschossige Gebäude

Performance – based fire safety design of multi‐storey buildings. In most countries fire design of multi‐storey buildings is still based on the standard temperature‐time curve (ISO 834) which is supposed to cover real fire scenarios on the safe side. A fire safety design considering more realistic natural fires and the redundancies of entire structural systems is risk‐oriented as well as economical. Using international experience and test results and ongoing research of iBMB, a design fire is developed and so‐called real fire curves are derived. They serve as a basis for general calculation methods (according to the Eurocodes) which are able to grasp the real behaviour of structural systems in a fire. A probabilistic safety concept guarantees the necessary reliability of the design taking the probability of fire development, the boundary conditions of life safety and the uncertainties of the design parameters into account.     

Der Eurocode 2 für Deutschland – Auswirkungen auf den Betonfertigteilbau

Die europäische Harmonisierung der technischen Regelwerke im Bauwesen schreitet nicht nur bei den Produktnormen, sondern auch bei den Bemessungsnormen für den konstruktiven Ingenieurbau unaufhaltsam voran. Während die meisten europäischen Länder jedoch schon im Laufe des Jahres 2010 die Umstellung auf die europäischen Bemessungsnormen vollzogen haben, wird die Anwendung der Eurocodes in Deutschland erst 2012 verbindlich werden. Der folgende Beitrag befasst sich mit den Auswirkungen auf Betonfertigteile bei einer Bemessung nach Eurocode 2 Teil 1‐1 und Teil 1‐2 und gibt einen Überblick, wie sich die europäischen Produktnormen für Betonfertigteile in das neue Regelwerk einordnen lassen. The Eurocode 2 for Germany – Impacts on Precast Concrete Constructions The accelerating harmonization of European technical standards does not only concern the product standards, but also the standards for the design of structures. Whereas most European countries have implemented the European design standards during 2010, in Germany the application of the structural Eurocodes will be mandatory not until 2012. The following article deals with the impacts on precast concrete constructions resulting from the application of the new Eurocode 2 part 1‐1 and part 1‐2 also regarding the harmonized European standards for precast concrete products.