EPS隔热夹芯板在建筑中的应用

本文主要论述了EPS隔热夹芯板的发展情况，主要原材料的组成，主要技术性能，在通过多年工程实践基础上提出EPS隔热夹芯板设计节点处理及与钢筋砼结构比较优点所在，以及EPS隔热夹芯板在国内大中型工程中的应用。     

高强金属夹芯板在工程中的应用

论述了以钢为金属面、聚氨酯弹性体为芯材的高强金属夹芯板的性能特点及在工程中的应用优势,介绍了其在船舶、桥梁、体育场馆和临时结构工程中的应用情况。     

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。     

金属面夹芯板耐火试验

根据在英国进行的金属面夹芯板的耐火试验 ,对目前国内轻钢结构中常用的几种金属面夹芯板在火灾中的性能进行了总结 ,试验报告表明 ,以硬质聚氨酯或高密度岩棉为夹层的复合夹芯板具有良好的耐火性能。     

现浇预应力混凝土夹芯板楼盖的工程应用

结合实际工程 ,通过比较几个结构方案的优劣发现 ,预应力混凝土夹芯板楼盖体系较其他结构体系 ,具有结构自重小、抗裂性能好、造价低等优势 ,是一种很有发展前途的结构体系。对预应力混凝土夹芯板楼盖的设计 ,提出了一些建议。     

建筑用金属面夹芯板力学性能研究现状

金属面夹芯板因其良好的保温、防火、隔声等性能,作为围护结构在装配式建筑工程中得到了广泛的应用,而力学性能作为其保证安全性的基本性能在应用之初就得到了广泛的研究。随着金属面夹芯板在装配式建筑中的推广,新问题及新技术的出现使得金属面夹芯板的力学性能的研究更深入广泛。本文阐述了目前建筑用金属面夹芯板结构的分类及力学特点、金属面夹芯板力学性能的研究方法,以及金属面夹芯板在抗弯承载力、抗风荷载性能和抗冲击性能方面的研究现状。由此可知,目前对金属面夹芯板力学性能的研究已较为成熟。为了使金属面夹芯板有更广泛的应用,还需对层间不完全粘结以及在火灾、低温等特殊情况下的金属面夹芯板的力学性能做进一步的研究。     

哈芬槽预埋件在金属幕墙夹芯板系统中的研究及应用

金属幕墙夹芯板系统凭借其优异的保温、美观、防火、节能等性能,在工业和民用建筑中得到了广泛的应用。但金属幕墙夹芯板系统对主体结构和墙面骨架安装的精度要求很高,因此要实现金属幕墙夹芯板的优异性能,其与主体结构连接成为关键所在。鉴于哈芬槽预埋件能够克服传统预埋件安装不方便、人工成本高、误差大等缺点,将哈芬槽预埋件应用到金属幕墙夹芯板系统中。结合西安三星工程对哈芬槽预埋件的构成、埋置方式、破坏方式进行详细介绍,指出忽视哈芬槽预埋件中槽钢卷边破坏模式可能导致工程不安全,并给出防止槽钢卷边破坏的实用计算方法。     

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。     

岩棉夹芯板的性能及其施工研究

论述了岩棉夹芯板的性能并通过工程实例,从岩棉夹芯板系统介绍、生产、运输、吊装、现场存放、安装准备、现场安装、质量处理等环节,阐述了岩棉夹芯板的实际应用,可供应用复合建筑板材的施工单位及相关人员参考。     

CL网架板在高层建筑中的应用与研究

CL建筑结构体系是一种复合钢筋混凝土剪力墙体系,适用于各种热工设计分区的不同抗震等级的民用建筑.其核心构件CL墙体由CL网架板(一种钢筋焊接网架保温夹芯板)两侧浇筑混凝土后形成.CL建筑结构体系作为建筑节能与结构一体化最具代表性的一种结构体系,通过几个工程案例介绍其在高层建筑中的应用.     

金属夹芯板温度及耐火性能实验研究

采用ABAQUS有限元分析软件,对不同芯材组合金属夹芯板的温度应力和耐火性能进行研究。通过对两端铰支和固结的边界条件下,金属夹芯板在温度荷载下的受力状况进行实验、分析,结果表明,室内外温差下,高温侧钢板四个角点部位应力达到屈服极限,钢板发生整体波纹状屈曲,温差对夹芯板力学性能的影响不可忽视。     

大跨度钢筋混凝土空腹夹层板柱结构的研究与应用

本文通过多项工程实例讨论了一种新型钢筋混凝土空腹式楼 (屋 )盖结构体系——钢筋混凝土空腹夹层板柱结构体系在大跨度 (18～ 24m)单层与多层建筑结构中应用时的“经济合理跨度”,并与钢筋混凝土密肋井字楼 (屋 )盖进行对比分析,说明其良好的技术经济指标和建筑功能。并讨论了预应力混凝土空腹夹层板柱结构体系在大跨度 (18～ 36m)建筑结构中应用时的“经济合理跨度”及其结构性能,以利推广应用。     

Impact tests on steel–concrete–steel sandwich beams with lightweight concrete core

This paper studies the impact performance of Steel–Concrete–Steel (SCS) sandwich beams consisting of a lightweight concrete core sandwiched between two face plates that are connected by J-hook connectors. Impact tests were carried out by dropping free weights on to sandwich beams to investigate their structural response against impact loads. Test results revealed that the proposed J-hook connectors provide an effective means to interlock the top and bottom steel face plates, preventing them from separation during impact. The use of fibres in concrete core and J-hook connectors for composite action enhances the overall structural integrity of the sandwich beams when compared with those without such enhancement. An elastic–plastic analysis method is developed to predict the force-indentation relationship of sandwich sections subjected to local impact. Dynamic analysis based on the local force-indentation relationship is carried out to predict the impact force and global response behavior of the sandwich beams. The predicted results are compared with those obtained from the tests to validate their accuracy so that they can be used to evaluate the performance of sandwich beams under low velocity hard impact.     

装配整体式预应力夹层板楼盖结构设计方法

介绍了装配整体式预应力混凝土夹层板在主跨度方向的承载力计算方法和正常使用极限状态的验算内容。详细描述了计算原理和叠合层与夹层板连接的构造措施。实例设计表明,预应力夹层板楼盖结构两个方向的设计均可采用现行规范中叠合式受弯构件的设计方法。     

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.     

一类新型陶粒混凝土夹芯楼板力学性能试验研究

陶粒混凝土夹芯楼板是一种压型钢板与陶粒混凝土的组合楼板,其空腹部分采用聚苯乙烯板填充,是一种新型轻质节能板材。依据对三块该种板材的力学试验,对该种板材的受力机理、力学性能进行了较全面的分析,同时给出了弯剪承载力和刚度的计算方法,可为该种板材的推广和工程应用提供参考。     

纤维增强复合材料及其结构研究进展

纤维增强复合材料因其轻质高强、可设计性和高耐久性在基础设施领域逐步得到关注与应用,通过结构体系创新,可部分替代钢和混凝土制造各类结构构件,满足建筑、桥梁、海洋等工程结构的强度、刚度及使用功能需求。国内外有关学者已进行了大量的研究和实践,基于相关成果从以下四个方面系统总结了国内外关于纤维增强复合材料结构的研究进展： 1） 组成材料及制造工艺方面,介绍了增强材料纤维、树脂基体和芯材的种类和性能,并阐述了几种典型制造工艺; 2） 基本构件与结构应用方面,归纳总结了复合材料筋索、型材、管材、板材以及夹芯结构的受力特点及在土木工程中的主要应用; 3） 复合材料结构力学理论方面,详细介绍了其基本力学性能以及冲击、疲劳、蠕变、耐火等性能,并阐述了监测与设计方法; 4） 复合材料结构耐久性方面,总结了温度、湿度、紫外线照射、化学介质（酸、碱、盐等）的侵蚀以及多因素耦合作用对其耐久性的影响,并归纳了耐久性提升技术研究现状。通过对基础设施领域复合材料结构的发展现状、应用的局限性以及前景的系统综述,促进复合材料结构的研究与工程应用。     

Steel-Concrete-Steel sandwich slabs with lightweight core — Static performance

This paper investigates the static performance of Steel-Concrete-Steel (SCS) sandwich slabs which consist of an ultra-lightweight concrete core sandwiched between two steel plates. Special J-hook connectors have been developed to develop composite action between the concrete core and the two steel plates. The core is made of lightweight concrete of density less than 1450 kg/m³. Laboratory tests were carried out on eight SCS sandwich slabs under centrally applied patch load. Test results showed that the mode of failure and crack pattern of SCS sandwich slabs were very similar to those of reinforced concrete slabs especially when the concrete core and steel plates act in a fully composite manner. Flexural and punching are the primary modes of failure. After flexural yielding, membrane action developed in the slab due to the effectiveness of J-hook connectors in maintaining composite action which further increases its load carrying capacity after flexural yielding. Theoretical models are proposed to predict the flexural and punching resistance and a good correlation with test results is obtained. A large deflection analysis considering plate membrane action is also proposed to predict the force deflection relation of SCS sandwich slabs.     

Fatigue performance of lightweight steel-concrete-steel sandwich systems

This paper investigates the static and fatigue strength behavior of a composite sandwich system, which consists of a lightweight concrete core sandwiched in between two steel plates and interconnected by J-hook connectors. For this purpose, fibre-reinforced lightweight concrete, of density less than 1450 kg/m³, and novel J-hook connectors that are capable of resisting tension and shear have been developed. Fatigue tests were carried out to study the fatigue behaviour of sandwich beams by varying the maximum applied load and load range. It is found that maximum applied load and load range affect fatigue performance independently. The maximum applied load has a significant effect on fatigue performance when the difference between it and the load range is large. Test evidence shows that considering only the load range, without taking into account the maximum applied load, may over-predict the fatigue life of the sandwich structural system. Finally, a three-parameter fatigue design equation, taking into account both the load range and maximum applied load, is proposed based on regression analysis of test data.