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Finite Element Analysis for Unstiffened Overlapped CHS KK-Joints Welded in Different Ways 不同焊接方式未加筋叠接CHS kk节点的有限元分析
Building Science Pub Date : 2008-01-01 DOI: 10.4028/scientific5/amr.446-449.533
Yang Wen-wei
{"title":"Finite Element Analysis for Unstiffened Overlapped CHS KK-Joints Welded in Different Ways","authors":"Yang Wen-wei","doi":"10.4028/scientific5/amr.446-449.533","DOIUrl":"https://doi.org/10.4028/scientific5/amr.446-449.533","url":null,"abstract":"The question whether hidden weld in unstiffened overlapped CHS KK-joints is welded or not is not clearly metioned in current code for design of steel structures(GB50017-2003).This paper mainly analyzes the influence of chord-to-brace diameter ratio β,diameter-to-ply ratio γ and brace-to-chord ply ratio τ on the ultimate bearing capacity of the joints with the hidden weld welded in two different ways.the influence of welded and non-welded hidden welds of the joints on hysteretic property under low frequency loading is analyzed,and hystertic loops of the joints are obtained by using the ANSYS finite element method.The hidden weld of the joints,no matter which is same side brace or opposite brace,only has slight influence on the failure modes and limit capacity of the joints.Hysteretic property of the joints in which the hidden weld is non-welded is much better than the welded,so in project the joints with the hidden weld can be non-welded.","PeriodicalId":9442,"journal":{"name":"Building Science","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2008-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88283228","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Experimental Study on Sensor Fault Detection and Diagnosis and Estimation of Centrifugal Chiller System 离心式冷水机组系统传感器故障检测与诊断与估计的实验研究
Building Science Pub Date : 2007-01-01 DOI: 10.13614/J.CNKI.11-1962/TU.2007.06.012
Xh Xu, Jt Cui, Shengwei Wang
{"title":"Experimental Study on Sensor Fault Detection and Diagnosis and Estimation of Centrifugal Chiller System","authors":"Xh Xu, Jt Cui, Shengwei Wang","doi":"10.13614/J.CNKI.11-1962/TU.2007.06.012","DOIUrl":"https://doi.org/10.13614/J.CNKI.11-1962/TU.2007.06.012","url":null,"abstract":"The reliability and accuracy of sensor measurements are greatly of significance to control and optimal operation of chiller system,as well as the basis of fault detection and diagnosis of chiller component faults.This paper presents a principle component analysis(PCA)-based sensor fault detection and diagnosis and estimation method for chiller system.A PCA model is composed of the observations of correlated variables in centrifugal chiller system in normal operation conditions aiming to capture the systematic variations of chiller system. These variations are used for the fault detection and diagnosis of new observations in terms of Q-statistic and Q-contribution plot.This PCA-based chiller sensor fault detection and diagnosis method was validated using the experimental test data of a centrifugal chiller.","PeriodicalId":9442,"journal":{"name":"Building Science","volume":"19 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2007-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84656687","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Research and Development in HVAC System Diagnosis 暖通空调系统诊断的研究与开发
Building Science Pub Date : 2006-01-01 DOI: 10.13614/J.CNKI.11-1962/TU.2006.06.032
Xinhua Xu, Sw Wang
{"title":"Research and Development in HVAC System Diagnosis","authors":"Xinhua Xu, Sw Wang","doi":"10.13614/J.CNKI.11-1962/TU.2006.06.032","DOIUrl":"https://doi.org/10.13614/J.CNKI.11-1962/TU.2006.06.032","url":null,"abstract":"Centralized air-conditioning(A/C) systems take a large proportion of total energy consumption in commercial buildings.Monitoring is very important for the proper operation of A/C systems.When a system does not operate as intended,this system should be diagnosed to locate where the fault is and what measures should be taken to fix this problem.Even if the system operates normally,the system also should be assessed continuously to verify if this system is energy-efficient or not.Therefore,fault detection and diagnosis,and also assessment are significantly essential to ensure proper operation,improve energy efficiency and indoor air quality.The development of fault detection and diagnosis of HVAC systems was reviewed in this paper.Additionally,it is pointed out that the research should be mainly focused on the practical applications of the existing methods and strategies of fault detection and diagnosis in building A/C systems.","PeriodicalId":9442,"journal":{"name":"Building Science","volume":"126 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2006-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79528808","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The flexural testing of some prestressed HAC Beams 几种预应力混凝土梁的抗弯试验
Building Science Pub Date : 1975-12-01 DOI: 10.1016/0007-3628(75)90038-9
B. Mayfield , J. Morris , M.J. Wyatt
{"title":"The flexural testing of some prestressed HAC Beams","authors":"B. Mayfield ,&nbsp;J. Morris ,&nbsp;M.J. Wyatt","doi":"10.1016/0007-3628(75)90038-9","DOIUrl":"https://doi.org/10.1016/0007-3628(75)90038-9","url":null,"abstract":"<div><p>Flexural tests on X7/5 wire prestressed concrete beams made with High Alumina Cement (HAC) are described. The beams were artificially converted (in the range 10–100±5%) and observations were made on central deflection, strains, ultrasonic pulse velocities, cube compressive and prism flexural strengths, and concrete moduli.</p><p>Although the conversion caused some major changes in the concrete properties the effect on the ultimate moment capacity of the beams was minor, due to the under-reinforced nature of this particular section at these particular concrete strengths.</p></div>","PeriodicalId":9442,"journal":{"name":"Building Science","volume":"10 4","pages":"Pages 263-270"},"PeriodicalIF":0.0,"publicationDate":"1975-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0007-3628(75)90038-9","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91776285","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The application of a partial boundary layer wind tunnel to the examination of dynamic response of cantilever structures to wind excitation 应用局部边界层风洞研究悬臂结构在风激励下的动力响应
Building Science Pub Date : 1975-12-01 DOI: 10.1016/0007-3628(75)90036-5
P.K. Das , R. Royles
{"title":"The application of a partial boundary layer wind tunnel to the examination of dynamic response of cantilever structures to wind excitation","authors":"P.K. Das ,&nbsp;R. Royles","doi":"10.1016/0007-3628(75)90036-5","DOIUrl":"https://doi.org/10.1016/0007-3628(75)90036-5","url":null,"abstract":"<div><p>The characteristics of a partial boundary layer wind tunnel are established for simulated air flow over an urban environment and the wind excitation of small cantilever structures is examined. The process of modelling the natural wind is explained and techniques are outlined for the measurement of mean and r.m.s. response of small scale structures. The significance of such information for indicating the dynamic response of large scale structures is discussed.</p></div>","PeriodicalId":9442,"journal":{"name":"Building Science","volume":"10 4","pages":"Pages 237-247"},"PeriodicalIF":0.0,"publicationDate":"1975-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0007-3628(75)90036-5","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91776282","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
The application of a partial boundary layer wind tunnel to the examination of dynamic response of cantilever structures to wind excitation 应用局部边界层风洞研究悬臂结构在风激励下的动力响应
Building Science Pub Date : 1975-12-01 DOI: 10.1016/0007-3628(75)90036-5
P. Das, R. Royles
{"title":"The application of a partial boundary layer wind tunnel to the examination of dynamic response of cantilever structures to wind excitation","authors":"P. Das, R. Royles","doi":"10.1016/0007-3628(75)90036-5","DOIUrl":"https://doi.org/10.1016/0007-3628(75)90036-5","url":null,"abstract":"","PeriodicalId":9442,"journal":{"name":"Building Science","volume":"162 1","pages":"237-247"},"PeriodicalIF":0.0,"publicationDate":"1975-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74106148","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
The flexural testing of some prestressed HAC Beams 几种预应力混凝土梁的抗弯试验
Building Science Pub Date : 1975-12-01 DOI: 10.1016/0007-3628(75)90038-9
B. Mayfield, J. Morris, M. Wyatt
{"title":"The flexural testing of some prestressed HAC Beams","authors":"B. Mayfield, J. Morris, M. Wyatt","doi":"10.1016/0007-3628(75)90038-9","DOIUrl":"https://doi.org/10.1016/0007-3628(75)90038-9","url":null,"abstract":"","PeriodicalId":9442,"journal":{"name":"Building Science","volume":"124 1","pages":"263-270"},"PeriodicalIF":0.0,"publicationDate":"1975-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88604042","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The use of cluster analysis in multi-storey layout planning 聚类分析在多层平面布局规划中的应用
Building Science Pub Date : 1975-12-01 DOI: 10.1016/0007-3628(75)90041-9
D.J. Carter , B. Whitehead
{"title":"The use of cluster analysis in multi-storey layout planning","authors":"D.J. Carter ,&nbsp;B. Whitehead","doi":"10.1016/0007-3628(75)90041-9","DOIUrl":"https://doi.org/10.1016/0007-3628(75)90041-9","url":null,"abstract":"<div><p>The logical design of the layout of a multi-storey building is a conceptually and numerically complex task which, if an acceptable algorithm can be devised, is ideally suited to a computer-aided approach.</p><p>Previous work in multi-storey layout planning at Liverpool<em>[1]</em> has been concerned with methods of defining vertical links. The present work considers the problem of allocation of activities to the various levels of a multi-storey building and computer-aided solution based on the use of techniques of cluster analysis is proposed. The principles of the computer program are described and its use in multi-storey layout planning is assessed.</p></div>","PeriodicalId":9442,"journal":{"name":"Building Science","volume":"10 4","pages":"Pages 287-296"},"PeriodicalIF":0.0,"publicationDate":"1975-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0007-3628(75)90041-9","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91776286","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 7
Preliminary studies of a cabled water tower 电缆水塔的初步研究
Building Science Pub Date : 1975-12-01 DOI: 10.1016/0007-3628(75)90037-7
E. M. To, J. Gero
{"title":"Preliminary studies of a cabled water tower","authors":"E. M. To, J. Gero","doi":"10.1016/0007-3628(75)90037-7","DOIUrl":"https://doi.org/10.1016/0007-3628(75)90037-7","url":null,"abstract":"","PeriodicalId":9442,"journal":{"name":"Building Science","volume":"88 1","pages":"249-261"},"PeriodicalIF":0.0,"publicationDate":"1975-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74884814","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Study of the influence of a pelmet type wind deflector on indoor air motion 球片式导风板对室内空气运动影响的研究
Building Science Pub Date : 1975-12-01 DOI: 10.1016/0007-3628(75)90035-3
I. Chand , P.K. Bhargava , N.L.V. Krishak
{"title":"Study of the influence of a pelmet type wind deflector on indoor air motion","authors":"I. Chand ,&nbsp;P.K. Bhargava ,&nbsp;N.L.V. Krishak","doi":"10.1016/0007-3628(75)90035-3","DOIUrl":"https://doi.org/10.1016/0007-3628(75)90035-3","url":null,"abstract":"<div><p>This paper describes a study of the performance of pelmet-type wind deflectors. The influence of dimensions and location of the deflector on the magnitude of indoor air motion at various levels above the floor is discussed. It is observed that the availability of air movement at a working plane 0.4 m above the floor can be enhanced by 30 per cent using a pelmet type deflector (height and width equal to 1/4 and 1/6 of the window height respectively) on the inlet. Air motion indoors is reduced when the deflector is fitted on the outlet but the decrease is negligible for a deflector of these dimensions.</p></div>","PeriodicalId":9442,"journal":{"name":"Building Science","volume":"10 4","pages":"Pages 231-235"},"PeriodicalIF":0.0,"publicationDate":"1975-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0007-3628(75)90035-3","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91776281","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
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