International Journal of Space Structures最新文献_第10页

Study on membrane roof schemes of annular crossed cable-truss structure 环形交叉索桁架结构膜屋面方案研究

International Journal of Space Structures Pub Date : 2019-09-01 DOI: 10.1177/0956059919887846

Jian Lu, S. Xue, X. Li, Renjie Liu

{"title":"Study on membrane roof schemes of annular crossed cable-truss structure","authors":"Jian Lu, S. Xue, X. Li, Renjie Liu","doi":"10.1177/0956059919887846","DOIUrl":"https://doi.org/10.1177/0956059919887846","url":null,"abstract":"Based on annular crossed cable-truss structure model with diameter of 17.15 m, the type of membrane roof was first studied. Two membrane roof schemes, cable-supported membrane roof and skeleton-supported membrane roof, were proposed. The form-finding analysis of two types of membrane roof structures was carried out. By comparative study, the strengths and weaknesses of two schemes were given, and the feasibility of skeleton-supported membrane roof was demonstrated. Second, skeleton-supported membrane roof was studied by collaborative form-finding and non-collaborative form-finding. The form-finding method being suitable for the structure was given. Finally, load analysis, parametric analysis, and dynamic characteristics of membrane and non-membrane roof structures were carried out. The results show that skeleton-supported membrane roof has the strength to resist to external loads. Poisson’s ratio and self-weight have little influence on membrane roof, and arch height and pretension of membrane surface have great influence on membrane roof. The vibration modes of structure are mainly manifested as up and down vibrations accompanying with local torsion of planar cable-truss frame, which is not bad for overall structure. Meanwhile, film-covering effects of annular crossed cable-truss structure are obvious. The study contents have promoted the application of annular crossed cable-truss structure in practical engineering.","PeriodicalId":34964,"journal":{"name":"International Journal of Space Structures","volume":"34 1","pages":"85 - 96"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1177/0956059919887846","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43039245","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: 4

Effect of the number of design variables in thickness optimization of concrete barrel roof shells using evolutionary algorithms 基于进化算法的混凝土筒形屋面板厚度优化中设计变量数的影响

International Journal of Space Structures Pub Date : 2019-09-01 DOI: 10.1177/0956059919893212

S. Ostovari, Hooman Shayani

引用次数: 1

Comparison of residual stress on different three-dimensional multi-layer welding methods of welded hollow sphere joint in large-span structure by considering latent heat 考虑潜热的大跨度空心球接头三维多层焊接方法残余应力比较

International Journal of Space Structures Pub Date : 2019-09-01 DOI: 10.1177/0956059919890257

Nam-Hyok Ri, Zhihua Chen, Yong-Sop Ri, Zhiyao Ma

{"title":"Comparison of residual stress on different three-dimensional multi-layer welding methods of welded hollow sphere joint in large-span structure by considering latent heat","authors":"Nam-Hyok Ri, Zhihua Chen, Yong-Sop Ri, Zhiyao Ma","doi":"10.1177/0956059919890257","DOIUrl":"https://doi.org/10.1177/0956059919890257","url":null,"abstract":"This article quantitatively evaluated the influence of three-dimensional multi-layer welding on the welding residual stress of super-big diameter welded hollow sphere joint in the large-span spatial steel structure considering the influence of material state change using finite element method. First, this article proposed a conception of equivalent state change time—the virtual time of state change in the analysis of welding and cooling—which represents the heat absorbed or released during the change of solid and fluid states in welding material. The equivalent state change time increases the accuracy of the thermal analysis considering the latent heat of fusion in welding and cooling process. Second, this article simulated the numerical experiments of three welding methods including multi-layer symmetric welding, multi-layer sequential welding, and single-layer symmetric welding, which show that multi-layer symmetric welding not only increases the balance of supporting ability of structure but also decreases the value of maximum tensile residual stress, and it is better than the other two welding methods.","PeriodicalId":34964,"journal":{"name":"International Journal of Space Structures","volume":"34 1","pages":"57 - 73"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1177/0956059919890257","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48710755","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

A fast and accurate dynamic relaxation approach for form-finding and analysis of bending-active structures 一种快速准确的动态松弛方法用于主动弯曲结构的寻形和分析

International Journal of Space Structures Pub Date : 2019-07-26 DOI: 10.1177/0956059919864279

Jef Rombouts, G. Lombaert, Lars De Laet, M. Schevenels

{"title":"A fast and accurate dynamic relaxation approach for form-finding and analysis of bending-active structures","authors":"Jef Rombouts, G. Lombaert, Lars De Laet, M. Schevenels","doi":"10.1177/0956059919864279","DOIUrl":"https://doi.org/10.1177/0956059919864279","url":null,"abstract":"Active bending is an increasingly popular construction technique that uses elastically bent structural members to form complex curved shapes. The design and analysis of bending-active structures requires an accurate simulation of the bending process, which is often complicated by the occurrence of large displacements. In this article, we propose to combine a previously developed implicit dynamic relaxation method with co-rotational beam elements to obtain a fast and accurate method for form-finding and analysis of bending-active structures. This approach is applied to four test cases. Implicit dynamic relaxation is compared to the classic Newton–Raphson method and conventional dynamic relaxation. The results show that the proposed implicit dynamic relaxation approach can be stabilized intuitively by changing the time step and damping ratio, making it more stable than the classic Newton–Raphson method. Moreover, the proposed approach converges fast compared to the conventional dynamic relaxation: the total computation time is considerably lower, even though the computation time per iteration is higher. Finally, a high accuracy is achieved due to the use of co-rotational beam elements. The combination of high accuracy and low computation time makes this approach well-suited for both form-finding and analysis of bending-active structures.","PeriodicalId":34964,"journal":{"name":"International Journal of Space Structures","volume":"34 1","pages":"40 - 53"},"PeriodicalIF":0.0,"publicationDate":"2019-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1177/0956059919864279","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43603467","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: 5

Analytical study of tensegrity lattices for mass-efficient mechanical energy absorption 张拉整体格用于质量有效机械能吸收的分析研究

International Journal of Space Structures Pub Date : 2019-05-13 DOI: 10.1177/0956059919845330

R. Goyal, E. P. Peraza Hernandez, R. Skelton

{"title":"Analytical study of tensegrity lattices for mass-efficient mechanical energy absorption","authors":"R. Goyal, E. P. Peraza Hernandez, R. Skelton","doi":"10.1177/0956059919845330","DOIUrl":"https://doi.org/10.1177/0956059919845330","url":null,"abstract":"This article studies tensegrity structures known as “D-bar” systems for applications as lightweight components for mechanical energy absorption. Aerospace structures such as planetary landers, designed to absorb energy from large impact loads while requiring minimal mass, would benefit from such components. Previous studies showed that D-bar systems support compressive loads with minimal mass compared with continuum options such as single columns. In this work, analytical equations for the mechanical (elastic) energy stored in D-bar systems of any complexity (a quantity proportional to the number of strings/bars in the system) are derived for the first time. The energy stored in D-bar systems is compared with that of bent buckled beams used in “flexible-bar tensegrity” concepts, which were proposed in the literature as energy absorption components for planetary landers. Comparisons are made between D-bar systems and bent buckled beams as isolated components subjected to a compressive load and as components of planetary landers. In all comparisons, the results show that D-bar systems of low complexity allow for higher energy storage and lower mass than bent buckled beams. Thus, it is concluded that D-bar systems can enhance the design of planetary landers and other applications that need lightweight mechanical energy absorption components.","PeriodicalId":34964,"journal":{"name":"International Journal of Space Structures","volume":"34 1","pages":"21 - 3"},"PeriodicalIF":0.0,"publicationDate":"2019-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1177/0956059919845330","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45431606","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: 28

Geometric design of a masonry lattice space dome titled KARBANDI in Persian architecture 波斯建筑中名为KARBANDI的砖石格子空间圆顶的几何设计

International Journal of Space Structures Pub Date : 2019-05-06 DOI: 10.1177/0956059919845631

Amir Amjad Mohammadi, Ahad Nejad Ebrahimi, Y. Shahbazi

{"title":"Geometric design of a masonry lattice space dome titled KARBANDI in Persian architecture","authors":"Amir Amjad Mohammadi, Ahad Nejad Ebrahimi, Y. Shahbazi","doi":"10.1177/0956059919845631","DOIUrl":"https://doi.org/10.1177/0956059919845631","url":null,"abstract":"Studies of historical buildings in Persian architecture have resulted in knowing a kind of masonry structure with a harmonic lattice geometry, which has been titled “Karbandi.” The most important and highly acclaimed feature of Karbandi is the correlation and coordination between its architectural and structural functions, which results in creating esthetic and meaningful spaces. The use of this structure is highly demanded in contemporary Persian architecture, but very little information about historical techniques survives to the present day and accordingly, there are ambiguities about its drawing and geometric design. Therefore, this research aims at discovering geometric relationships and principles of Karbandi to regulate and facilitate its design process in contemporary architecture. Toward this end, its historical samples were analyzed and their geometric features were found. As a consequence, the connection distance of dividing points on the circle is an important parameter for creating various types of Karbandi on a base. For instance, the height of a Karbandi and its elaboration are directly related to the connection distance. In addition, it was clarified that the height of a Karbandi and the size of its Shamseh are in an inverse relationship. Finally, a comprehensive classification was presented based on found geometric features.","PeriodicalId":34964,"journal":{"name":"International Journal of Space Structures","volume":"34 1","pages":"22 - 39"},"PeriodicalIF":0.0,"publicationDate":"2019-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1177/0956059919845631","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44820530","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

Analytical graphic statics 分析图形静力学

International Journal of Space Structures Pub Date : 2019-02-20 DOI: 10.1177/09560599211001651

T. Baranyai

引用次数: 2

SPS reviewer list 2018 2018年SPS评审名单

International Journal of Space Structures Pub Date : 2019-01-01 DOI: 10.1177/0266351119829347

引用次数: 0

Bending tests for the structural safety assessment of space truss members 空间桁架构件结构安全评定的弯曲试验

International Journal of Space Structures Pub Date : 2018-09-01 DOI: 10.1177/0266351118804123

M. Bonopera, Kuo-Chun Chang, Chun-Chung Chen, Tzu-Kang Lin, N. Tullini

引用次数: 17

Comparison of four meta-heuristic algorithms for optimal design of double-layer barrel vaults 双层筒形拱顶优化设计的四种元启发式算法比较

International Journal of Space Structures Pub Date : 2018-09-01 DOI: 10.1177/0266351118803019

A. Kaveh, M. Ilchi Ghazaan, Soroush Mahjoubi

引用次数: 2