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Study on the Dynamic Characteristics of Light Steel Residential Structural System 被引量:1
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作者 Wenwei Yang Qili Yang 《Engineering(科研)》 2017年第6期591-598,共8页
The study on the dynamic characteristics of light steel residential structural system has both theoretical and practical significance for the application and promotion of light steel residential structural system. In ... The study on the dynamic characteristics of light steel residential structural system has both theoretical and practical significance for the application and promotion of light steel residential structural system. In this paper, we analyze several common types of light steel residential structural system, describe the dynamic characteristics of the light steel residential structural system for an overview on the basis of former related studies, and then summarize the advantages of light steel residential structure system. 展开更多
关键词 light steel structure RESIDENTIAL DYNAMIC CHARACTERISTICS
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Discussion on Construction Technology and Welding Deformation of High-Rise Steel Frame Structure
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作者 Sijin He Xinzhong Leng 《Journal of World Architecture》 2023年第5期23-28,共6页
Because of urbanization,land resources in China’s cities has become increasingly scarce.Therefore,modern buildings are becoming taller,making high-rise steel frame structures the new favorite of the construction indu... Because of urbanization,land resources in China’s cities has become increasingly scarce.Therefore,modern buildings are becoming taller,making high-rise steel frame structures the new favorite of the construction industry.However,the construction of high-rise steel frame structures requires advanced technology.If the construction technology is effectively implemented and the welding techniques of the construction personnel align with the requirements for high-rise steel frame structures,it can help mitigate deformations in the steel structure,thus preserving the overall construction quality of high-rise steel frame structures.To enhance the applicability of steel frame structures in high-rise buildings,this paper focuses on analyzing the optimization path for the construction process of high-rise steel frame structures.It introduces a tailored approach to control welding-induced deformations in steel frame structures,aiming to make a valuable contribution to the advancement of China’s construction industry. 展开更多
关键词 High-rise steel frame structure Construction technology Welding deformation structural stability
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Research on the structural design and the shock-resistant performance of the steel beam-concrete column frame structure
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作者 WANG Qiao 《International English Education Research》 2019年第2期56-59,共4页
The steel beam-concrete column(RCS)frame structure is composed of the reinforced concrete columns and the steel beams,which is a composite structure with the superior performances.This kind of the frame structure has ... The steel beam-concrete column(RCS)frame structure is composed of the reinforced concrete columns and the steel beams,which is a composite structure with the superior performances.This kind of the frame structure has been rapidly developed and widely used in the field of the civil engineering because of its high building applicability,the fast construction speed,the low cost of the foundation and the good mechanical properties.Various kinds of the large-span,heavy-load and high-rise buildings emerge in endlessly,and the requirement for the structural performance is becoming higher and higher.The reinforced concrete column-steel beam composite frame structure is a high-performance structural system with the broad development prospects in China because of its good mechanical performance,durability,fire resistance and the building use space. 展开更多
关键词 steel beam-concrete COLUMN frame structure CONFIGURATION design shock-resistant PERFORMANCE
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Numerical Simulation of Dynamic Response and Collapse for Steel Frame Structures Subjected to Blast Load 被引量:4
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作者 张秀华 段忠东 张春巍 《Transactions of Tianjin University》 EI CAS 2008年第B10期523-529,共7页
The progressive collapse of steel frame structures under the blast load was investigated using LS-DYNA. The multi-material Eulerian and Lagrangian coupling algorithm was adopted. A flu-id-structure coupling finite ele... The progressive collapse of steel frame structures under the blast load was investigated using LS-DYNA. The multi-material Eulerian and Lagrangian coupling algorithm was adopted. A flu-id-structure coupling finite element model was established which consists of Lagrange element for simulating steel frame structures and concrete ground, multiple ALE element for simulating air and TNT explosive material. Numerical simulations of the blast pressure wave propagation, struc-tural dynamic responses and deformation, and progressive collapse of a five-story steel frame structure in the event of an explosion near above ground were performed. The numerical analysis showed that the Lagrangian and Eulerian coupling algorithm gave good simulations of the shock wave propagation in the mediums and blast load effects on the structure. The columns subjected to blast load may collapse by shear yielding rather than by flexural deformation. The columns and joints of steel beam to column in the front steel frame structure generated enormous plastic defor-mation subjected to intensive blast waves, and columns lost carrying capacity, subsequently lead-ing to the collapse of the whole structure. The approach coupling influence between struc-tural deformation and fluid load well simulated the progressive collapse process of structures, and provided an effective tool for analyzing the collapse mechanism of the steel frame structure under blast load. 展开更多
关键词 blast load progressive collapse steel frame structures numerical simulation finite element
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Determination Method on Initial Pretension of Cables in Steel Mega Frame and Prestressed Composite Bracing Structure
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作者 唐柏鉴 王飞 顾盛 《Journal of Donghua University(English Edition)》 EI CAS 2013年第6期455-460,共6页
Determining initial pretension values of pre-stressed cables is one of the key problems for a steel mega frame and pre-stressed composite bracing structure.Through the mechanical analysis of the composite bracing unde... Determining initial pretension values of pre-stressed cables is one of the key problems for a steel mega frame and pre-stressed composite bracing structure.Through the mechanical analysis of the composite bracing under vertical loading,the critical factors deciding the initial pretention value were found.According to these factors,a rule for the initial pretension value was put forward.The determination equations were acquired based on the principle of force equilibrium at nodes.The numerical results indicate that the internal force disequilibrium in composite bracings resulted from symmetrical load can be eliminated only in a symmetrical way,so that initial pretention values are decided only by vertical loads.The influencing coefficient leveling method,taking into account interactions between story and story,is accurate and feasible. 展开更多
关键词 pre-stressed steel structure mega frame composite bracing initial presention influencin coefllcient levelinf method
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Dynamic Performance Analysis of Steel Frame Structure under Seismic Action
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作者 Xiaojun Yuan Jinlong Liu +2 位作者 Yanmu Qu Kailin Wei Haifeng Zong 《Frontiers Research of Architecture and Engineering》 2019年第2期1-4,共4页
In order to find out the dynamic characteristics of a steel frame structure project in the 8 degree (0.3g) area, the artificial wave, Taft wave and El Centro wave were input by using the finite element analysis softwa... In order to find out the dynamic characteristics of a steel frame structure project in the 8 degree (0.3g) area, the artificial wave, Taft wave and El Centro wave were input by using the finite element analysis software ANSYS. The dynamic time-history analysis of the structure shows the dynamic performance of the structure under the frequent earthquakes and rare earthquakes. 展开更多
关键词 steel frame structure DYNAMIC TIME-HISTORY ANALYSIS DYNAMIC performance
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Selection and modification of ground motion records using Newmark-Hall spectrum as target spectrum for long-period structures 被引量:1
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作者 Fu Jianyu Wang Dongsheng +1 位作者 Zhang Rui Chen Xiaoyu 《Earthquake Engineering and Engineering Vibration》 SCIE EI CSCD 2023年第1期117-134,共18页
Input ground motions have significant impacts on the uncertainty of structural responses in time-history analysis.In this study,records were selected and scaled for the evaluation of mean structural responses accordin... Input ground motions have significant impacts on the uncertainty of structural responses in time-history analysis.In this study,records were selected and scaled for the evaluation of mean structural responses according to the target spectrum.The Newmark-Hall spectrum is closely related to seismic response of short,medium and long-period structures,so it was taken as the target spectrum here.The nonlinear time-history analyses of 9-story and 20-story steel moment-resisting frame structures were carried out as examples.They represent medium and long-period buildings,respectively.Three target spectra with risk of 50%,10%and 2%probabilities for exceedance in 50 years were calculated by the average Newmark-Hall spectrum method for three ground motion sets developed in the SAC Steel Project.The predicted structural mean responses of these Newmark-Hall spectra were compared with those calculated by the average spectral acceleration method for the same record set.It is found that both methods have similar accuracy for estimating the structural mean response.However,the method proposed herein is more effective in reducing the variability of the structural responses.Also,the proposed method is more advantageous for the time-history analysis of long-period structures or structures with more severe nonlinear responses under strong seismic excitations. 展开更多
关键词 time-history analysis selection and modification of ground motions target spectrum Newmark-Hall spectrum steel moment resisting frame structure
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Development of Light Weight Structures to Provide Blast-Resistant Designs
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作者 CRAWFORD John E 《Transactions of Tianjin University》 EI CAS 2006年第B09期16-21,共6页
In the past, blast-resistant designs for structures were often constructed with massive type structural systems, which relied more on brute strength than on finesse to achieve the required blast resistance. However, s... In the past, blast-resistant designs for structures were often constructed with massive type structural systems, which relied more on brute strength than on finesse to achieve the required blast resistance. However, structures composed of COLD-FORMED steel components, such as sheet metal and metal studs, have shown great promise in providing blast resistance with the added benefits of low cost and ease of construction. Some examples of using such structures to provide containment for package handling facilities (PHF) are described in the paper for situations where blast containment is needed, such as a potential package bomb being discovered during the package vetting process. Results from tests and analytic data are used to illustrate aspects of design peculiar to such types of applications. Designs for specific capacities of PHF are described. 展开更多
关键词 blast containment package handling facility hardened design light weight structures COLD-FORMED steel structures
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Slotted Hole Effect on Damage Mechanism of Gymnasium Building with RC Frame and Steel Roof
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作者 Atsushi Suzuki Tomomi Fujita Yoshihiro Kimura 《Open Journal of Civil Engineering》 2020年第2期162-174,共13页
On the 2011 off the Pacific Coast of Tohoku Earthquake, gymnasium buildings exhibited the unexpected structural damages, which prevented a use as evacuation shelters in during- and post-disaster periods. The major fai... On the 2011 off the Pacific Coast of Tohoku Earthquake, gymnasium buildings exhibited the unexpected structural damages, which prevented a use as evacuation shelters in during- and post-disaster periods. The major failure occurr<span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;">ing</span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;"> on the connection between the RC column top and steel roof as well as the cracks in the RC column base w</span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;">as</span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;"> observed during the emergent inspection. According to the earlier studies, it was implied that the presence of the slotted hole possibly deteriorates the seismic capacity;however, the length of slotted hole was fixed at a certain value. Facing this concern, this research attempts to clarify the influence of the slotted hole length through a comprehensive parametric study by pushover and seismic response analyses. In conclusion, it has been discovered that the slotted hole deteriorates the seismic capacity for the connection failure up to almost 50% of that without slotted hole. Moreover, the discrepancy of characteristics obtained by the static and dynamic analyses is originated by means of the presence of slotted hole. This slotted hole effect should be noted by structural engineers and researchers to provide the adequate seismic diagnosis and strengthening.</span></span></span> 展开更多
关键词 RC frame with steel Roof structure The 2011 off the Pacific Coast of Tohoku Earthquake Damage Mechanism Pushover Analysis Seismic Response Analysis
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The Construction Technology of Freeform Surface Spatial Bending-Torsion Steel Structure
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作者 Tong Lu Shuai Wang +3 位作者 Ke-yang Wu Chen Liu Zhen-min Wang Chen Qian 《Journal of World Architecture》 2022年第4期53-60,共8页
Taking the construction project of the National Cybersecurity Talents and Innovation Base as an example,this paper studies the construction technology of freeform surface spatial bending-torsion steel structure based ... Taking the construction project of the National Cybersecurity Talents and Innovation Base as an example,this paper studies the construction technology of freeform surface spatial bending-torsion steel structure based on structural design model transformation,including the parametric modeling of deepening design model,computer-aided bending and torsion frame production,flexible docking in the bending-torsion combination unit,and welding stress deformation,in hope to provide reference for similar projects in the future. 展开更多
关键词 Freeform surface Spatial bending-torsion steel structure Construction technology Parametric modeling Bending and twisting frame
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基于BIM技术与模拟退火算法的村镇轻钢框架结构智能设计方法 被引量:3
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作者 周婷 孙克肇 +1 位作者 陈志华 刘红波 《土木与环境工程学报(中英文)》 CSCD 北大核心 2024年第1期139-151,共13页
传统村镇住宅结构设计需要进行大量的人工试算与重复建模,而受制于建设成本,村镇住宅无法像城镇住宅一样通过设计师进行专业的结构设计与验算,其安全性与经济性均难以满足要求。为此,提出一种村镇轻钢框架结构智能设计方法,包括智能建... 传统村镇住宅结构设计需要进行大量的人工试算与重复建模,而受制于建设成本,村镇住宅无法像城镇住宅一样通过设计师进行专业的结构设计与验算,其安全性与经济性均难以满足要求。为此,提出一种村镇轻钢框架结构智能设计方法,包括智能建模与智能优化两个环节。基于图层自动识别算法、光学字符识别技术、自适应分块算法提出村镇轻钢框架结构BIM智能建模方法,包括图层识别、轴文本数据提取、墙体轮廓提取等,智能建模结果基本满足实际工程要求。基于提出的两阶段模拟退火算法给出村镇轻钢框架结构的智能优化方法,优化速度较快,优化效果良好。通过实际工程案例对提出的智能设计方法进行验证,结果表明,提出的村镇轻钢框架结构智能设计方法具有可行性,与传统的人工设计方法相比,设计周期可缩短70%以上,材料用量、结构设计指标接近人工设计结果。 展开更多
关键词 村镇住宅 轻钢框架结构 智能设计 BIM技术 模拟退火算法
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钢支撑-钢筋混凝土掉层框架结构抗震性能试验研究 被引量:2
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作者 刘立平 李瑞锋 +2 位作者 殷尧日 李英民 邓飞 《工程力学》 EI CSCD 北大核心 2024年第1期182-192,共11页
为改善坡地钢筋混凝土(RC)掉层框架结构抗侧刚度分布的不均匀性,设计了一栋在上接地层设置钢支撑的RC掉层框架结构,按1/4比例提取其顺坡向中榀框架下部5层子结构为试验对象,开展钢支撑-RC掉层框架拟静力试验,观测试件的破坏过程,并对比R... 为改善坡地钢筋混凝土(RC)掉层框架结构抗侧刚度分布的不均匀性,设计了一栋在上接地层设置钢支撑的RC掉层框架结构,按1/4比例提取其顺坡向中榀框架下部5层子结构为试验对象,开展钢支撑-RC掉层框架拟静力试验,观测试件的破坏过程,并对比RC掉层框架试验所得试件的破坏形态,分析试件滞回性能、延性和刚度退化等抗震性能指标。结果表明:试件的最终破坏是以第4层柱底混凝土压溃,梁端混凝土剥落、底部钢筋断裂,顶层柱顶混凝土剥落为标志。与RC掉层框架试验结果相比,钢支撑-RC掉层框架试件上接地柱的破坏明显减轻,柱端破坏分布也更为均匀,避免了掉层框架结构“半层破坏模式”的出现,改善了结构的耗能和抗地震倒塌能力。但试件上接地层相邻上一层的变形和破坏程度较大,应对该楼层的柱端进行适当的抗震加强;设置钢支撑后,试件的滞回曲线较为饱满,并具有良好的延性(正、负向加载的位移延性系数分别可达5.13、5.69),正负向加载的刚度退化曲线也趋于对称。 展开更多
关键词 掉层框架结构 钢支撑 拟静力试验 抗震性能 破坏模式
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装配式轻钢框架-轻钢骨架轻混凝土墙板结构抗震性能 被引量:5
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作者 曹万林 杨兆源 《北京工业大学学报》 CAS CSCD 北大核心 2024年第2期165-179,共15页
为研究装配式轻钢框架-轻钢骨架轻混凝土墙板结构抗震性能,对1个足尺轻钢框架结构试件和3个足尺轻钢框架-轻钢骨架轻混凝土墙板结构试件进行了低周反复荷载下的抗震性能试验及理论分析,试件变量包括:2种装配构造,即内嵌式装配墙板、外... 为研究装配式轻钢框架-轻钢骨架轻混凝土墙板结构抗震性能,对1个足尺轻钢框架结构试件和3个足尺轻钢框架-轻钢骨架轻混凝土墙板结构试件进行了低周反复荷载下的抗震性能试验及理论分析,试件变量包括:2种装配构造,即内嵌式装配墙板、外贴式装配墙板;2种轻钢骨架轻混凝土墙板,即框架式轻钢骨架轻混凝土墙板、桁架式轻钢骨架轻混凝土墙板。研究了各试件的破坏特征和损伤演化过程,分析了结构滞回特性、承载力、变形能力、刚度退化、耗能性能和应变。结果表明:装配式轻钢框架-轻钢骨架轻混凝土墙板结构共同工作性能良好,其水平承载力相比轻钢框架提高了204.7%~210.4%,抗侧刚度提高了257.3%~512.5%,结构变形及耗能能力有显著提高;内嵌墙板的自攻钉连接构造以及外贴墙板的螺栓连接构造传力性能可靠,结构具备2道抗震防线的受力特征;基于简化塑性分析模型以及拉压杆软化桁架模型,对试件承载力进行了计算,计算结果与试验符合较好。 展开更多
关键词 装配式组合结构 轻钢框架 轻钢骨架轻混凝土墙板 抗震性能 低周反复荷载试验 承载力计算
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杭州电竞中心结构设计重难点概述 被引量:2
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作者 熊森 冯孝宾 +3 位作者 张卫 罗俊 鲁伟 郑小庆 《建筑结构》 北大核心 2024年第17期9-15,共7页
杭州电竞中心内圈主体结构采用钢框架-支撑结构,外圈采用“大倾角梭形斜柱+多段钢折梁框架”,是集承重与抗侧力于一体的结构体系,屋盖采用车辐式索承网格自平衡结构形式。详细介绍了地下结构、中央场馆结构的设计要点,门厅处利用建筑造... 杭州电竞中心内圈主体结构采用钢框架-支撑结构,外圈采用“大倾角梭形斜柱+多段钢折梁框架”,是集承重与抗侧力于一体的结构体系,屋盖采用车辐式索承网格自平衡结构形式。详细介绍了地下结构、中央场馆结构的设计要点,门厅处利用建筑造型空间设计为多段钢折梁与跨层桁架相结合的结构形式;室内二层至三层楼面设计一浮空弧形人行桥,截面形式为薄壁钢箱梁,桥宽2.2m,跨度57m,采用“上挂下支”的稳定结构形式。对整体结构进行了静力弹性、动力弹塑性、振动台试验、典型节点有限元、整体稳定以及局部稳定等系列分析与试验。结果表明:结构在静力荷载和地震作用下强度和刚度均满足规范要求;典型节点极限承载力为荷载设计值的4.17倍;结构整体稳定性安全系数为3.79;斜柱局部稳定安全系数为2.52。合理的设计保证了结构的安全、经济和实用性。 展开更多
关键词 杭州亚运会 杭州电竞中心 钢框架-支撑 大倾角梭形斜柱 多段钢折梁 车辐式索承网格自平衡结构
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乌兹别克斯坦9度区某超高层建筑结构设计与优化 被引量:1
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作者 闫锋 花炳灿 安东亚 《建筑结构》 北大核心 2024年第13期51-56,共6页
对于9度设防地区的超高层建筑,其结构设计基本由地震作用控制,因此抗震设计尤为重要。建筑消能减震技术可在提高结构地震安全储备的同时,降低整体工程造价,是结构优化设计的有效措施。对位于9度区的超高层建筑进行了结构方案选型对比、... 对于9度设防地区的超高层建筑,其结构设计基本由地震作用控制,因此抗震设计尤为重要。建筑消能减震技术可在提高结构地震安全储备的同时,降低整体工程造价,是结构优化设计的有效措施。对位于9度区的超高层建筑进行了结构方案选型对比、结构方案优化、减震设计方案比选、剪力墙内嵌钢板优化。结果显示,钢骨混凝土框架⁃核心筒方案相对于钢框架⁃支撑方案具备更高的成本优势;框架⁃核心筒方案可通过精细化设计作进一步优化;在此基础上,对钢骨混凝土框架⁃核心筒方案采用两种消能减震方案进行比选,结果表明,采用黏滞阻尼器方案的结构抗震性能明显优于采用黏滞阻尼墙方案;最后通过增大剪力墙竖向分布钢筋配筋率,对低区核心筒墙肢中的内嵌钢板进行了优化。 展开更多
关键词 9度抗震设防 超高层建筑 钢骨混凝土结构 框架⁃核心筒 消能减震
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钢管混凝土键连接框架梁和剪力墙的受剪性能 被引量:1
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作者 李明 刘栩邑 +2 位作者 吴潜 吴欣禹 吴永新 《沈阳建筑大学学报(自然科学版)》 CAS 北大核心 2024年第1期38-46,共9页
目的 研究钢管混凝土键连接框架梁和剪力墙的受剪性能,为工程应用提供设计依据。方法 应用有限元分析软件ABAQUS对比钢管混凝土键连接与现浇连接梁墙的结构受剪性能,分析前者受剪机理及不同因素对受剪性能的影响。结果 钢管混凝土键连... 目的 研究钢管混凝土键连接框架梁和剪力墙的受剪性能,为工程应用提供设计依据。方法 应用有限元分析软件ABAQUS对比钢管混凝土键连接与现浇连接梁墙的结构受剪性能,分析前者受剪机理及不同因素对受剪性能的影响。结果 钢管混凝土键连接梁墙的结构承载力和延性系数较现浇结构分别提高约10%和34%;钢材强度从Q235到Q390,初始刚度增加8.44%;截面高度从100 mm到120 mm,延性系数提高17.73%;截面厚度每增加2 mm,承载力提高约15%;截面长度和混凝土强度等级对承载力、初始刚度和延性系数的影响均小于15%,纵向距离对其受剪性能几乎无影响。结论 采用钢管混凝土键连接梁墙的结构总体受剪性能优于现浇结构;钢材强度和截面厚度分别是影响初始刚度和承载力的主要因素。 展开更多
关键词 钢管混凝土键 框架-剪力墙结构 梁墙试件 抗剪性能 有限元分析
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设有叠合柱的局部错层RC框架结构地震易损性分析 被引量:1
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作者 张淑云 刘建波 +2 位作者 代慧娟 王乐 高欣悦 《中国科技论文》 CAS 2024年第3期275-283,共9页
为研究某一设有叠合柱的局部错层钢筋混凝土(reinforced concrete,RC)框架结构在近断层和远场地震作用下的破坏概率,自定义钢管混凝土叠合柱塑性铰参数,并与试验对比验证塑性铰参数的有效性。采用SAP2000建立非线性分析模型,选取近断层... 为研究某一设有叠合柱的局部错层钢筋混凝土(reinforced concrete,RC)框架结构在近断层和远场地震作用下的破坏概率,自定义钢管混凝土叠合柱塑性铰参数,并与试验对比验证塑性铰参数的有效性。采用SAP2000建立非线性分析模型,选取近断层和远场地震波共22条,分别以地震峰值加速度(peak ground acceleration,PGA)和最大层间位移角作为地震动强度指标和结构性能指标,基于增量动力分析(incremental dynamic analysis,IDA)结果和点估计函数对错层框架结构进行易损性分析。结果表明:对于远场地震动,结构满足“三水准”抗震设防要求,在罕遇地震下超越防止倒塌极限状态的概率仅为0.24%;结构在近断层多遇地震下仍能满足“小震不坏”的设计要求,设防地震下结构超越修复后使用极限状态的概率为53.63%,发生中等破坏的概率较大,罕遇地震下结构达到倒塌极限状态的概率为5.37%,较远场地震作用破坏更为严重。研究结果可为错层框架结构的设计和地震风险评估提供参考。 展开更多
关键词 近断层地震 错层框架结构 钢管混凝土叠合柱 增量动力分析 点估计
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装配式型钢混凝土叠合框架梁连接节点构造设置与安全分析 被引量:1
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作者 林琳 《佳木斯大学学报(自然科学版)》 CAS 2024年第1期111-114,共4页
住房和城乡建设部印发《“十四五”建筑业发展规划》提出大力发展装配式建筑、推动生产和施工智能化升级的主要任务。而国内目前采用的预制叠合框架梁存在着跨度大自重大吊装成本高、预制梁柱节点位置易发生钢筋碰撞吊装定位难度大等问... 住房和城乡建设部印发《“十四五”建筑业发展规划》提出大力发展装配式建筑、推动生产和施工智能化升级的主要任务。而国内目前采用的预制叠合框架梁存在着跨度大自重大吊装成本高、预制梁柱节点位置易发生钢筋碰撞吊装定位难度大等问题,限制了装配式建筑结构的发展。结合实际工程项目,提出一种新型的装配式型钢混凝土叠合框架梁,并对该叠合梁的构造设置、连接方式及安全性进行分析,从而为装配式框架结构、框架—剪力墙结构等装配式建筑中框架梁的深化设计提供一种新的拆分方案。 展开更多
关键词 装配式建筑 型钢混凝土结构 叠合框架梁 构造设置 安全性分析
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木结构墙体空气声隔声性能
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作者 岳孔 程相宇 +3 位作者 张玉才 吴鹏 石鑫磊 郭华瑜 《林业科学》 EI CAS CSCD 北大核心 2024年第10期104-115,共12页
【目的】研究全频段范围内木结构墙体空气声隔声性能,明确限制常规构造木骨架墙体隔声性能的瓶颈,揭示设置隔声垫层、改变骨架类型、设置窗体等设计参数对墙体隔声性能的影响规律,提出高空气声隔声等级的木结构墙体体系,为木结构墙体在... 【目的】研究全频段范围内木结构墙体空气声隔声性能,明确限制常规构造木骨架墙体隔声性能的瓶颈,揭示设置隔声垫层、改变骨架类型、设置窗体等设计参数对墙体隔声性能的影响规律,提出高空气声隔声等级的木结构墙体体系,为木结构墙体在装配式建筑中的高效应用提供技术支撑。【方法】通过小尺寸材料层面的阻抗管法试验,比较分析60~6300 Hz频率范围内工业级弹性橡胶板(橡胶板)、聚氨酯橡胶隔音减震板(聚氨酯板)和聚苯乙烯挤塑板(XPS板)等隔声垫层的隔声性能;基于实验室法开展全尺寸墙体在100~5000 Hz频率范围内的隔声试验,通过1/3倍频程频段18个中心频率对应的单值隔声量,得到墙体计权隔声量(R_(w))、频谱修正量和隔声等级,并与装配式建筑中广泛应用的蒸压加气混凝土(ALC)墙体和正交胶合木(CLT)墙体进行比较。【结果】相较同一厚度的聚氨酯板和XPS板,全频段范围内橡胶板的隔声量较高,且其隔声性能随板厚增加而提高,试验范围内,10 mm厚橡胶板隔声效率最高。常规构造木骨架墙体的隔声量整体上随声波频率增加而提高,该墙体体系在125和3150 Hz处分别出现明显的共振隔声低谷和吻合隔声低谷,其R_(w)为43 dB,用作隔墙或围护构件时的空气声隔声等级分别为4和3级;在墙骨架和定向刨花板(OSB)间设置10 mm厚橡胶板后,受制于木龙骨的声桥作用,墙体隔声性能提升有限,R_(w)增至45 dB,隔声等级未发生改变,常规构造和设置橡胶板的木骨架墙体体系均不满足现行国家标准对普通住宅墙体的隔声要求。当墙骨架采用轻钢骨架且轻钢骨架两侧均覆面双层石膏板(GB)时,该墙体体系的R_(w)增至50 dB,用作隔墙或围护构件时的空气声隔声等级分别升至6和5级;在石膏板和轻钢骨架间设置10 mm压缩玻璃棉条后,R_(w)增至51 dB,隔声等级未发生改变,该轻钢骨架墙体体系满足现行国家标准对普通住宅墙体的隔声要求。与200 mm厚单层和复合ALC墙体相比,试验范围内轻钢骨架墙体的厚度和面密度分别降低35%和70%,但空气声隔声性能更高;针对道路交通、企业生产经营和日常生活等噪音对应的频率范围(160~630 Hz),该轻钢骨架墙体体系的隔声性能增加明显。在常规构造木骨架墙体基础上开洞安装R_(w)为33 dB的窗体,墙体在全频段范围内的隔声频谱特性曲线未发生明显变化,其R_(w)达44 dB,用作隔墙或围护构件时的空气声隔声等级分别为5和4级;常规构造木骨架墙体一侧的GB由单层增至双层、木骨架和OSB间设置10 mm厚橡胶板、木骨架和GB间设置金属减震龙骨制成复合墙体,在复合墙体上安装窗体,该墙体的R_(w)增至48 dB,且在低频段下的共振隔声低谷和高频段下的吻合效应低谷消除或明显变浅,用作隔墙或围护构件时的空气声隔声等级分别升至6和5级,满足现行国家标准对普通住宅墙体的隔声要求。【结果】与木骨架墙体相比,CLT墙体的空气声隔声性能较低;共振隔声低谷、吻合隔声低谷和声桥效应是限制常规构造木骨架墙体隔声性能的瓶颈因素,导致该墙体体系不能满足现行国家标准对普通住宅墙体的隔声要求。将木骨架替换为轻钢骨架,并设置隔声垫层、增加墙面板数量,能够有效提高墙体的空气声隔声性能。 展开更多
关键词 木结构墙体 空气声隔声性能 隔声垫层 轻钢骨架 计权隔声量
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功能可恢复RCS混合框架结构研究进展
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作者 刘阳 钟沛杰 +3 位作者 门进杰 陈云 刘小娟 黄玉佳 《华侨大学学报(自然科学版)》 CAS 2024年第2期121-135,共15页
钢筋混凝土柱-钢梁(RCS)混合框架结构以其结合了混凝土优异的抗压性能及钢材优异的抗弯性能而受到广泛关注,而可恢复功能结构以其震后快速恢复使用功能的能力,也成为地震工程界研究的新热点。功能可恢复RCS混合框架结构可以在弯矩较大... 钢筋混凝土柱-钢梁(RCS)混合框架结构以其结合了混凝土优异的抗压性能及钢材优异的抗弯性能而受到广泛关注,而可恢复功能结构以其震后快速恢复使用功能的能力,也成为地震工程界研究的新热点。功能可恢复RCS混合框架结构可以在弯矩较大的梁端和柱脚部位设置可更换构件,实现结构的功能可恢复能力。文中简述了近年来功能可恢复RCS混合框架结构研究进展,重点关注各类型功能可恢复钢梁、功能可恢复摇摆柱脚的构造研究,介绍了功能可恢复RCS混合框架结构性能分析研究进展。最后,对功能可恢复RCS混合框架结构仍需深入研究的问题进行了展望。 展开更多
关键词 钢筋混凝土柱-钢梁(RCS)混合框架结构 可恢复功能 防震结构 钢板阻尼器 柱脚 梁柱节点
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