几种金属面夹芯板的耐火性能测试

用垂直构件耐火试验炉研究不同厚度的金属面岩棉夹芯板、EPS夹芯板、聚氨酯夹芯板、酚醛夹芯板的耐火性能.用岩棉与EPS、岩棉与聚氨酯进行组合进行耐火性能测试,100 mm厚的岩棉—EPS夹芯板、岩棉—聚氨酯的耐火极限分别达到85、90 min,较大提高了EPS夹芯板和聚氨酯夹芯板的耐火性能.     

建筑夹芯板破坏模式

夹芯板的结构设计不同于传统的建筑构件 ,本文分析了夹芯板的结构特性 ,讨论了其破坏模式 ,供设计参考     

混凝土夹芯板正截面受弯承载力的计算分析

混凝土夹芯板的截面及配筋形式受到限制,且其上层混凝土层很薄,截面中性轴位置的微小变化会引起截面承载力的较大变动,如果采用普通钢筋混凝土构件的计算公式对其进行正截面受弯承载力的计算,结果会偏于不安全。利用MATLAB编程软件依据钢筋混凝土结构分析理论编写了计算机程序,对混凝土夹芯板受弯构件进行了正截面受力全过程的计算分析。提出求解混凝土夹芯板受弯构件截面受压区高度的方法以及正截面受弯承载力的计算公式。     

专利摘要

一种双复合保温夹芯板,包括由轻质保温材料作为芯材、以金属板覆面而制成的夹芯板,其特征在于：在夹芯板的金属板覆面层外包覆有水泥包裹层。本实用新型的双复合保温夹芯板既具有传统夹芯板优良的隔热保温性能,又具有像水泥构件的高强度、大刚度、长耐久性等性能,同时还具有外观、质感及适应范围与水泥构件相当的特点,因此可作为主流建筑的保温外墙板、保温屋面板使用。     

双复合保温夹芯板

一种双复合保温夹芯板,包括由轻质保温材料作为芯材（1）,以金属板覆面而制成的夹芯板,其特征在于：在夹芯板的金属板覆面层外包覆有水泥包裹层（3）。本发明的双复合保温夹芯板既具有传统夹芯板优良的隔热保温性能,又具有像水泥构件的高强度、大刚度、长耐久性等性能,同时还具有外观、质感及适应范围与水泥构件相当的特点,因此可作为主流建筑的保温外墙板、保温屋面板使用。     

复合夹芯板大尺度燃烧性能试验方法

介绍德国、英国、ISO国际标准化组织关于复合夹芯板的大尺度燃烧性能试验方法,包括构件的耐火性能、屋顶外部防火性能及复合夹芯板建筑体的燃烧性能试验方法等,分析认为将复合夹芯板构建成建筑体,综合考察其防火性能更能代表实际应用情况.介绍我国复合夹芯板相关测试方法.     

纤维增强复合材料夹芯板的力学性能研究

为了探索纤维增强复合材料(FRP)夹芯板在土木工程领域中的应用,通过四点加载试验考察了纤维增强复合材料夹芯板的力学性能。结果表明:FRP夹芯板的破坏形态为构件封边FRP的剥离和加载处上表皮FRP的局部破坏;FRP夹芯板具有较高的承载能力,可以满足普通民用建筑中的楼板或墙板的安全使用要求;构件的位移延性系数可以达到3.0,并且具有一定的变形恢复能力。此外,FRP夹芯板的残余变形是由夹芯泡沫的塑性变形造成的。     

喷射纤维增强砂浆-EPS夹芯板受弯承载力试验研究

为研制具有多层次防火、隔热、保温功能的薄壁轻质复合构件,对新型纤维增强砂浆-EPS夹芯板的受弯承载力进行试验研究,得到该种新型夹芯板在均布荷载作用下的荷载-应变和荷载-挠度曲线。结果表明:在夹芯板达到极限承载力时,该种板发生脆性破坏,但其极限挠度符合相应技术标准要求。     

工业建筑防火规范和钢面复合夹芯板

世界上,钢面复合夹芯板用于工业建筑中的外墙构件和屋面板已有多年,欧洲是最大的硬质复合夹芯板工业化生产地。亚太地区约占欧洲市场的40％,且     

岩棉夹芯板耐火性能研究

论述了岩棉夹芯板的特点、燃烧性能、耐火极限,通过构件试验确定了１００ｍｍ 厚墙板的耐火极限,并得出其应用范围,可供开发应用复合建筑板材的相关人员参考。     

The strength characteristics of aluminum honeycomb sandwich panels

Aluminum sandwich construction has been recognized as a promising concept for structural design of lightweight transportation systems such as aircraft, high-speed trains and fast ships. The aim of the present study is to investigate the strength characteristics of aluminum sandwich panels with aluminum honeycomb core theoretically and experimentally. A series of strength tests are carried out on aluminum honeycomb-cored sandwich panel specimen in three point bending, axial compression and lateral crushing loads. Simplified theories are applied to analyze bending deformation, buckling/ultimate strength and crushing strength of honeycomb sandwich panels subject to the corresponding load component. The structural failure characteristics of aluminum sandwich panels are discussed. The test data developed are documented.     

夹芯板在建筑中的应用研究

作为一种新型建筑材料,夹芯板目前在工程中得到了愈来愈广泛的应用。文章阐述了夹芯板的结构组成、受力特点、国内外对夹芯板的研究状况以及夹芯板在实际工程使用中要注意的事项,使工程人员更清楚地认识到下一步需要研究的问题。     

Sandwich panels

In recent years, there has been increasing interest in the use of structural sandwich panels as the cladding of buildings and a good deal of research and development has been carried out. This paper reviews the state of the art with regard to the structural design of elements consisting of two thin metal faces separated by a lightweight core. Various aspects are discussed but two are given particular attention, namely methods of global analysis and the local buckling of compressed face elements. The analysis of sandwich panels under all possible loading and boundary conditions no longer poses any problem. Classical solutions, approximate solutions and numerical methods such as finite elements all have their place and are reviewed in detail. Local buckling phenomena in sandwich elements are similar to those in other thin-walled metal elements with the added consideration that buckling is resisted by the core material. This leads to some quite complex analysis which requires simplification for practical design. The paper includes a useful bibliography of recent references.     

铝制蜂窝夹芯板的强度特性

铝夹芯结构非常适合于设计飞机、高速列车和快艇等轻型交通系统。研究目的主要是明确包含铝蜂窝状内芯的铝制夹芯板在理论和试验中的强度特性。对弯曲、轴压和侧向撞击荷载作用下的铝蜂窝夹芯板构件进行了一系列强度试验。在相应荷载作用下,运用简化理论分析蜂窝夹芯板的弯曲变形、屈曲/极限强度和破坏强度。同时也讨论了结构失效模式,并给出了试验数据。     

新型绿色建筑结构绝缘板力学性能的试验研究

结构绝缘板是采用秸秆板或定向结构板作为结构面板,粘结于绝缘泡沫芯材两侧而形成的夹芯板结构,具有良好的节能环保特性.采用真空槽对不同厚度组合的结构绝缘板进行均布荷载下试验,得到材料特性和其相应的荷载-挠度曲线,为结构绝缘板理论分析和计算公式的获得创造条件.     

Analysis and design of steel-concrete composite sandwich systems subjected to extreme loads

This paper presents the design guide based on analytical, numerical and experimental investigation of Steel-concrete-steel (SCS) sandwich structural members comprising a lightweight concrete core with density ranged from 1300 to 1445 kg/m³ subjected to static, impact and blast loads. The performance of lightweight sandwich members is also compared with similar members with normal weight concrete core and ultra high strength concrete core (f _c = 180 MPa). Novel J-hook shear connectors were invented to prevent the separation of face plates from the concrete core under extreme loads and their uses are not restricted by the concrete core thickness. Flexural and punching are the primary modes of failure under static point load. Impact test results show that the SCS sandwich panels with the J-hook connectors are capable of resisting impact load with less damage in comparison than equivalent stiffened steel plate panels. Blast tests with 100 kg TNT were performed on SCS sandwich specimens to investigate the key parameters that affect the blast resistance of SCS sandwich structure. Plastic yield line method is proposed to predict the plastic capacity and post peak large deflection of the sandwich plates. Finally, an energy balanced model is developed to analyze the global behavior of SCS sandwich panels subjected to dynamic load.     

Finite element analysis and design of sandwich panels subject to local buckling effects

Past research into the local buckling behaviour of fully profiled sandwich panels has been based on polyurethane foams and thicker lower grade steels. The Australian sandwich panels use polystyrene foam and thinner and high strength steels, which are bonded together using separate adhesives. Therefore a research project on Australian sandwich panels was undertaken using experimental and finite element analyses. The experimental study on 50 foam-supported steel plate elements and associated finite element analyses produced a large database for sandwich panels subject to local buckling effects, but revealed the inadequacy of conventional effective width formulae for panels with slender plates. It confirmed that these design rules could not be extended to slender plates in their present form. In this research, experimental and numerical results were used to improve the design rules. This paper presents the details of experimental and finite element analyses, their results and the improved design rules.     

Web crippling strength of a steel sandwich panel with V-shaped webs

Steel sandwich panels with V-shaped web flutes (V-core panels) serve the structural functions of a proposed energy-efficient roof system for residential construction. Due to its intended use as a flexural member spanning between a ridge beam and a structural wall, and required slender webs for weight considerations, web crippling under end one-flange loading is a critical strength limit state for the V-core panels. Although the 2001 North American Specification for the Design of Cold-Formed Steel Structural Members provides a design procedure to address web crippling, those design rules were developed for members whose cross sections are different from that of V-core panels. Consequently, nine specimens were tested to collect data on V-core panels subjected to end one-flange loading. Test observations suggested that V-core panels behave very similarly to multi-web decks that are strapped and unfastened to the supports. Experimental data reported in the literature was used to modify the web crippling strength equation in the Specification to reflect these particular conditions. The modified equation was found to adequately predict the measured web crippling strength of V-core panels.     

Modelling of cold-formed steel sandwich purlin-sheeting systems to estimate the rotational restraint

Sandwich panels are attached to cold-formed steel purlins in roofs of industrial buildings to provide insulation. As the strength of the attached purlins is considerably increased due to the lateral and rotational restraints provided by the sandwich panels, estimating these restraints is important in the design of purlins. The rotational restraint is generally determined by experiments, as no design rules exist for sandwich purlin-sheeting systems. In this paper, a non-linear finite element model is presented to estimate the rotational restraint provided by the sandwich panels to the attached purlin. The model is validated with experimental tests and is in good agreement. In order to develop a design method for estimating the rotational restraint in sandwich purlin-sheeting systems, the model could be useful for parametric studies to investigate the influencing factors.     

混凝土夹芯双向板的夹层板理论分析和有限元分析

混凝土夹芯板作为一种新型的楼板(屋面板)体系,其应用一直局限于单向板。本文对混凝土夹芯双向板分别采用夹层板理论和有限元分析软件ANSYS进行了分析。两者结果十分接近,证明了有限元分析的正确性。分析结果表明该类板的抗裂性能较好,刚度较大,且具有较高的抗弯承载力,能更好地适应今后楼板(屋面板)体系的发展方向。