钢框架内嵌连接轻钢龙骨注浆复合墙板结构抗震性能试验研究

轻钢龙骨注浆复合墙板作为建筑工业化的低层承重墙板或高层围护墙板,由于其自重轻、易安装,在工程中有很好的应用前景.然而目前国内外尚缺乏在地震作用下钢框架内嵌连接轻钢龙骨注浆复合墙板结构的试验数据和分析结果.开展了2榀钢框架内嵌连接轻钢龙骨注浆复合墙板结构试件和1榀轻钢龙骨注浆复合墙板试件的水平低周往复加载试验,研究参数为...     

基于钢板连接的夹芯墙板-钢框架装配式体系抗震性能

为了研究基于钢板连接的夹芯墙板-钢框架体系的抗震性能,首先对钢板连接下的夹芯墙板与钢框架进行了抗剪性能试验,研究了连接钢板的抗剪性能,然后进行了1榀连接钢板厚度为3 mm夹芯墙板钢框架体系、1榀连接钢板厚度为6 mm夹芯墙板钢框架体系和1榀对比空框架体系的低周往复试验,分析了各试件的失效模式、滞回性能、耗能能力以及刚度退化规律等,最后综合评价其抗震性能。结果表明:连接钢板的平均抗剪承载力为59.8 kN,并且连接钢板的焊接质量会影响其受力性能,造成墙板框架体系正负向极限承载力的不对称,最大相差达到25.1%; 当连接钢板较薄时,连接件撕裂与开焊,除连接件附近混凝土开裂外,墙板基本完好; 当连接钢板较厚时,连接件基本完好,墙板斜对角开裂破坏,加厚钢板虽能提高体系的初始刚度,但延性有所降低; 增设墙板能提高主体框架的承载力、延性与耗能能力等,并且墙板与钢框架之间协调变形,表现出良好的整体性; 当水平位移较大时,墙板与框架形成对角斜撑机制; 研究成果可为后续开展夹芯墙板与框架相互作用机理的研究提供理论指导。     

装配式钢结构复合夹芯墙板施工新技术研究及墙板性能模拟分析

针对装配式建筑受原材料配合比、配套材料、成型工艺、安装工序、结构荷载等作用,工程应用中产生裂缝的现象日益增多,对装配式建筑内隔墙板施工新技术及受力变形特性进行分析,采用有限元软件ADINA,建立水泥基复合夹芯墙板抗弯及抗剪计算模型,考虑几何非线性、材料非线性,提出计算基本假定,对水泥基复合夹芯墙板在横向均布荷载作用下抗弯及抗剪性能进行模拟,分析水泥基复合夹芯墙板的开裂荷载、极限荷载、复合墙板的荷载-挠度关系曲线及复合墙板的荷载-应变关系曲线,并将有限元分析结果与型式检验报告结果对比,验证计算模型的准确性,得出水泥基复合夹芯墙板是一种轻质高强、抗弯抗剪性能良好的内隔墙体。     

空腔砌体复合填充墙钢框架结构极限承载能力试验研究

完成了模型率为1∶2的一榀纯钢框架和一榀1∶2空腔砌体复合填充墙钢框架试件的低周往复加载试验。详细地描述了钢框架结构和空腔砌体复合填充墙钢框架结构在低周往复加载作用下的破坏过程,分析了其在低周往复加载作用下的破坏形态、刚度退化、滞回性能和耗能能力等特性,结果显示空腔砌体复合填充墙钢框架结构比一般普通钢框架结构抗侧力性能好,耗能能力强。探讨了影响空腔砌体复合填充墙钢框架结构承载力的主要因素,并提出了改进措施。提出了空腔砌体复合填充墙钢框架结构的极限承载力计算公式,及其设计方法。该研究成果可为空腔砌体复合填充墙钢框架抗震设计提供依据。     

梁连接下钢框架内嵌墙板破坏形态研究

为研究梁连接方式下钢框架内嵌墙板结构在地震作用下的破坏形态,设计了基于不同连接件形式、连接件数量的四榀钢框架内嵌墙板结构试件和一榀空钢框架试件,进行了低周反复荷载试验并分析了各试件破坏形态。试验结果表明:裂缝主要出现在墙板连接件附近区域;梁连接方式下,节点连接方式不同对结构的抗侧力性能影响不同,节点刚度的相对大小影响其破坏形态;连接件形式不同而数量相同时,钢框架内嵌墙板试件的破坏形态类似。     

内嵌聚苯板高强混凝土复合剪力墙抗震性能试验研究

内嵌聚苯板复合剪力墙是一种新型的承重多功能墙板,对3个内嵌聚苯板高强混凝土复合剪力墙模型进行低周反复荷载试验,对高强混凝土复合剪力墙的承载力、刚度及其退化过程、延性、滞回特性及破坏特征进行研究,重点研究斜向钢筋支撑配筋率不同对墙体抗震性能的影响。试验结果表明:在3个高强混凝土复合剪力墙构件中,带有斜向支撑钢框架高强混凝土复合剪力墙的抗震性能比普通钢框架高强混凝土复合剪力墙明显提高,而且随着配筋率的提高,高强混凝土复合剪力墙的承载力、后期刚度、延性等也随之明显提高。     

装配式外挂墙板钢框架受力性能有限元分析

提出一种用于钢结构的外挂墙板装配方案,为研究此种装配方案的外挂墙板钢框架的抗侧力性能及抗震性能,采用ABAQUS有限元软件建立装配式外挂墙板钢框架整体模型及对比模型,分别对其进行了单向加载和低周往复加载有限元分析。结果表明:外挂墙板连接节点能够保证外挂墙板与钢框架间的连接,结构在侧向荷载作用下发生较大变形时,能够限制墙板与框架间的传力,保证墙板处于弹性状态,适应框架侧向变形,避免墙板破坏掉落;外挂墙板与连接节点组成的围护体系显著改善了钢框架的受力性能,结构的初始刚度提高了1.18倍,承载力增加了30%以上;该外挂墙板装配方案能够增强结构的抗震性能,在模拟低周往复加载时,外挂墙板钢框架模型最终破坏时总耗能与纯框架模型相比增加90%以上。     

整体钢框架内嵌加气混凝土填充墙板足尺模型振动台试验研究

为了研究内嵌加气混凝土（ALC）墙板对框架结构抗震性能的影响,进行了带内嵌ALC填充开洞墙板的两层钢框架结构足尺模型振动台试验。采用了预埋连接节点以减少板材连接对墙板造成的损伤,并采用自攻螺钉对窗口部位进行加固。试验研究了框架的振动特性及墙板的损伤情况,分析了内嵌加气混凝土墙板对钢框架结构的频率、阻尼比、刚度、楼层加速度以及楼层位移的影响。研究表明：带加气混凝土墙板钢框架结构的层间抗侧刚度较纯钢框架的提高了111%;结构的阻尼比为6.94%,大于结构设计中3%的标准;墙板位移比钢框架位移略小,表明该连接节点具有一定减震效果;模型结构的加速度放大系数随地震烈度的增加而逐渐增加,表明结构逐渐进入塑性状态;在8度罕遇地震作用下,墙板位移角达到1/49且未发生墙板脱落或者坍塌现象,仅墙板有较小损伤,表明墙板及连接节点具有良好的抗震性能。     

新型连接方式内嵌墙板钢框架拟静力试验研究

为了研究基于新型连接方式下内嵌墙板与钢框架结构的地震协同工作性能和破坏机理,对新型连接方式内嵌墙板钢框架、传统L形卡件连接内嵌墙板钢框架及纯钢框架等3种工况进行了拟静力试验,对比分析了3个试件的破坏模式、滞回曲线、骨架曲线和刚度退化曲线等抗震性能指标。结果表明：内嵌墙板能够提高钢框架的极限承载力、变形能力和刚度,传统L形卡件连接墙板钢框架的抗震承载力是纯框架抗震承载力的1.34倍,新型连接方式墙板钢框架的抗震承载力是传统节点框架抗震承载力的1.42倍。当加载位移为12 mm（层间位移角为1/133）时,采用传统连接的试件中间墙板破坏较为严重且已达到混凝土极限应变,而采用新型连接的试件中间墙板未发现明显损伤,仍处于工作状态。新型连接通过连接节点处的连接件滑动耗能,延缓墙板开裂时间,减轻墙板损伤,增加了内嵌墙板钢框架大震下的耗能储备。     

装配式混凝土框架-冷弯薄壁型钢复合墙板结构抗震性能试验研究

为研究装配式混凝土框架-冷弯薄壁型钢复合墙板(CTSC墙板)结构的抗震性能和破坏机理,对1榀装配式混凝土纯框架和2榀装配式混凝土框架-CTSC墙板结构进行了低周反复荷载试验。通过分析结构破坏模式、荷载-位移曲线、刚度退化特征、延性、耗能机理以及关键部位应变变化规律,探究了CTSC墙板内嵌式连接和外挂式连接对装配式混凝土框架抗震性能的影响。结果表明：CTSC墙板内嵌或外挂连接均安全可靠,可有效地保证地震作用下装配式混凝土框架与CTSC墙板的协同工作;与纯框架相比,采用内嵌和外挂连接形式时结构的水平承载力分别提高28.3%和15.0%,初始刚度分别提高38.4%和16.8%。基于等效拉压杆原理,提出了装配式混凝土框架内嵌CTSC墙板结构的抗侧刚度简化计算式,并验证了计算结果的准确性。     

Comparisons of honeycomb sandwich and foam-filled cylindrical columns under axial crushing loads

For the conventional thin-walled energy absorber, the energy dissipation during a collision is concentrated in relatively narrow zones. This means that a great deal of material does not participate in the plastic deformation or enter the large plastic deformation stage. To expand the plastic deformation zones and improve the energy absorption efficiency, the authors presented a new type of honeycomb sandwich circular column. This innovative energy absorber is a composite structure composed of two circular aluminum tubes filled with core shaped as a large-cell honeycomb lattice. In this paper, six different honeycomb sandwich circular columns were investigated numerically. Comparisons of the interaction effect between tubes and filler, the deformation modes and the energy absorption abilities of these columns were conducted. The results were as following. The kagome sandwich column had the best energy absorption capability, followed by the columns sandwiched with triangle, hexagon lattices. In addition, foam-filled columns with different adhesive conditions were also simulated and compared with the honeycomb sandwich columns. It was found that increasing the adhesive strength improved the energy absorption and changed the deformation mode of the foam-filled columns. Furthermore, comparison showed that the honeycomb sandwich columns had higher specific energy absorption capability than the foam-filled tubes except for the strong bonded case. The kagome sandwich column performed best in crashworthiness, followed by triangle sandwich column.     

Crashworthiness investigation of kagome honeycomb sandwich cylindrical column under axial crushing loads

For the classic thin-walled energy absorber, the energy dissipation during a collision is concentrated over relatively narrow zones. This means that a great deal of materials of the columns do not participate in the plastic deformation or not enter into the large plastic deformation stage. To expand the plastic deformation zones and improve the energy absorption efficiency, a new type of kagome honeycomb sandwich bitubal circular column is presented in this paper. This innovative impact energy absorber is made of two circular aluminum tubes filled with core shaped as a large-cell kagome lattice. The interaction effect, deformation mode and energy absorption characteristics of the composite structure are investigated numerically. Observing the collapsing process, it is found that the kagome lattices buckle first, which triggers the outer and inner skin tubes to fold locally. This behavior increases the plastic deformation areas. Moreover, the presence of the outer and inner tubes strengthens the buckling capacity of kagome cell. Furthermore, the folded tube walls intrude into the gap of the honeycomb cell, which further retards the collapse of the honeycomb cell. So the interaction effects between the honeycomb and column walls greatly improve the energy absorption efficiency. In addition, the effects of geometrical parameters of the kagome honeycomb on the structural crashworthiness are studied. It is found that the cell wall thickness and cell distribution (cell number in the circumferential direction) have distinct effects on the specific energy absorption. Besides, we also studied the foam-filled column with the same foam density as the kagome honeycomb and compared it with the kagome sandwich structure. It is found that the kagome sandwich column has higher mean crash force and better energy absorption characteristics.     

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。     

核厚对铝泡沫夹芯板抗弯性能的影响

研究了在4点弯曲工况下，铝泡沫核心/热塑性复合材料面层构成的夹芯板的核心厚度对变形机制的影响。通过全过程应力分析和观察，得出不同核厚下一系列的失效机制。各个样本厚度对应不同失效区域均可观察到高应变集中。相对薄的样本表面出现折皱和破裂现象，一些核也会碎裂，相对厚的样本的失效取决于核的凹陷。增加表面厚度可以避免核的凹陷，否则，可以观察到关键的核被剪碎。     

夹芯节能墙砌体抗剪性能的试验研究

对烧结装饰多孔砖夹芯复合墙砌体抗剪强度进行了试验,分析了两个强度等级水泥砂浆和两种不同形式拉接筋试件的抗剪及其破坏特征,从而为夹芯复合墙体结构技术规程的编制提供依据.     

Flexural strength and energy absorption of carbon-fiber–aluminum-honeycomb composite sandwich reinforced by aluminum grid

The full potential of carbon-fiber and aluminum-honeycomb sandwich panels and structures has been limited by the huge property mismatch between the high-stiffness carbon fiber and low-stiffness aluminum honeycomb. In this study, an orthogrid structure was added into the sandwich structure to raise the stiffness of soft honeycomb and therefore reduce the interfacial mismatch. The core then became an aluminum orthogrid structure filled with aluminum-honeycomb blocks. Three point bending tests were conducted to compare carbon fiber sandwiches with different types of core: (1) aluminum-honeycomb core; (2) aluminum-plate orthogrid core; and (3) aluminum-plate orthogrid core filled by aluminum-honeycomb blocks. The honeycomb filled orthogrid core sandwich was a bit heavier than the honeycomb or grid sandwich, but the critical load, specific strength and energy absorption ability were all improved. The results indicated that the honeycomb filled orthogrid core sandwich with carbon fiber face sheet could provide improved structural properties for thin walled engineering structures.     

夹芯墙砌体抗剪性能的试验研究

对烧结装饰多孔砖夹芯复合墙砌体抗剪强度进行试验,通过选择两种不同形式的拉结筋,对夹芯复合墙砌体的抗剪性能及其破坏特征进行分析,并提出了抗剪强度设计强度取值系数,为夹芯复合墙体技术规程的编制提供依据。     

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.     

一种新型的夹芯结构

金属（铝壳,蜂房或金属泡沫核）或聚合物（复合面层,聚合物泡沫核）夹芯结构被认为是承受弯曲荷载的优化设计结构。本文在发挥金属性材料和聚合物材料优势的基础上,研制了一种新的混杂夹芯结构。这种新理念的结构中金属片用在外表面以加强刚度,轻质核与外壳粘结成整体。此外,还将复合层或木材层作为中间层以提高冲击阻力。制造这种新结构潜在的方法是基于真空压缩。对该结构的研究包含基于有限元分析的几种面层的理论构造,改进的简化方程,对典型案例的试验。