International Journal of Space Structures最新文献_第3页

Buckling-Controlled Member for Improving the Ductile Behavior of Double-Layer Latticed Space Structures 改善双层网架空间结构延性的屈曲控制构件

International Journal of Space Structures Pub Date : 2023-04-17 DOI: 10.1177/09560599231161447

M. Kheirollahi, M. Chenaghlou, K. Abedi

{"title":"Buckling-Controlled Member for Improving the Ductile Behavior of Double-Layer Latticed Space Structures","authors":"M. Kheirollahi, M. Chenaghlou, K. Abedi","doi":"10.1177/09560599231161447","DOIUrl":"https://doi.org/10.1177/09560599231161447","url":null,"abstract":"In this paper, a new buckling-controlled member (BCM) is introduced for use in space structures. This member is composed of four components; namely: the encasing, joints, core, and adjustable nuts. The core is intended to act as a structural element to resist the axial loads by its yielding under compression loading. The steel encasing is supposed to confine the steel core. Adjustable steel nuts on the steel core act as lateral bracings and are responsible for lateral load transmission between the encasing and core. The joints at the two ends of the supports of the member. Six experimental tests have been performed under compression load to show the efficiency of the new member. The test results reveal that the proposed member can provide the needed ductility and can delay the brittle buckling of the members. Also, the BCM is capable of considering buckling modes and controlling the plastic range. The experimental and numerical results have also been compared. Additional numerical evaluations have been carried out using finite element models, in which the effects of different parameters of the member have been investigated. The obtained results showed that the arrangement of inner elements is the main factor affecting ductility and postponing the buckling of the members. In the end, the effects of the BCMs on the overall behavior of four double-layer space structures have been studied. The obtained results of analyses indicated that the BCMs can enhance the strength and ductility of space structures, thereby reducing the risk of collapse. Also, the seismic collapse of the space structure was postponed.","PeriodicalId":34964,"journal":{"name":"International Journal of Space Structures","volume":"38 1","pages":"159 - 180"},"PeriodicalIF":0.0,"publicationDate":"2023-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47713682","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

Wind effect on scallop domes with negative amplitude and prominence using Experimental and Numerical Study 风对扇贝负振幅和负凸起的影响的实验和数值研究

International Journal of Space Structures Pub Date : 2023-04-17 DOI: 10.1177/09560599231166897

Amir Nejati, H. Sadeghi, M. Heristchian

{"title":"Wind effect on scallop domes with negative amplitude and prominence using Experimental and Numerical Study","authors":"Amir Nejati, H. Sadeghi, M. Heristchian","doi":"10.1177/09560599231166897","DOIUrl":"https://doi.org/10.1177/09560599231166897","url":null,"abstract":"This study investigates the wind effect on hexa-sectored scallop domes using Computational Fluid Dynamics (CFD) and wind tunnel tests. Similar to the shape of a seashell, the scallop dome is one of the most common domes used to cover large spans. The scallop dome has an additional curvature equal to its sectors compared to a base dome (spherical). Hence, it has better structural efficiency compared to a spherical dome under the same condition. The curvatures on the scallop dome create alternate “ridges” and “grooves” on it. According to the computations of the article, the grooves created on this dome in the sector, as well as their position angle to the wind direction significantly affect pressure coefficient value. Due to these differences, wind pressure on scallop domes significantly differs from wind pressure on spherical domes. The results indicate that the ridges cause negative wind pressure coefficients whose magnitude reaches a maximum of −2.0 for an angle of alignment of 30°. The analyses have been conducted through Ansys-Fluent. This study presents the equation of wind pressure coefficient in the most critical of dome groove positions. The arch created between the grooves of a scallop dome is another effective parameter on maximum negative pressure. In the case study scallop dome, if the wind effect angle is considered α = 15, the maximum deformation in the structure will be created, which is 20% higher than that of α = 0.","PeriodicalId":34964,"journal":{"name":"International Journal of Space Structures","volume":"38 1","pages":"181 - 192"},"PeriodicalIF":0.0,"publicationDate":"2023-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47205707","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 novel graphical assessment approach for compressed curved structures under vertical loading 竖向荷载作用下压缩弯曲结构的一种新的图形评价方法

International Journal of Space Structures Pub Date : 2023-04-10 DOI: 10.1177/09560599231161424

C. Olivieri, S. Adriaenssens, C. Cennamo

引用次数: 1

Editorial 编辑

International Journal of Space Structures Pub Date : 2023-02-27 DOI: 10.1177/09560599231158660

S. Adriaenssens, A. Behnejad

引用次数: 0

Optimized orientation of jointing system in free-form lattice space structures 自由形式点阵空间结构中连接系统的优化取向

International Journal of Space Structures Pub Date : 2023-02-17 DOI: 10.1177/09560599231153103

Hadi Esmailnejad, M. Chenaghlou, K. Abedi

{"title":"Optimized orientation of jointing system in free-form lattice space structures","authors":"Hadi Esmailnejad, M. Chenaghlou, K. Abedi","doi":"10.1177/09560599231153103","DOIUrl":"https://doi.org/10.1177/09560599231153103","url":null,"abstract":"The recent decades have witnessed the development of a new generation of space structures called free-form space structures. In this new family of space structures, due to the geometric nature of the structure, the orientation of the members varies substantially within the joints, meaning that the members need to be connected to the joints at different angles. The wide distribution of these angles throughout the structure will significantly affect the cost of fabrication. Therefore, accurate and automatic calculation of connection angles and their optimizations have always been of interest to researchers and manufacturers. This article has the following two main objectives. The first objective is to provide geometric calculations and obtain the connection angles of single-layer lattice space structures. The second, and more important objective is to review the existing methods and to develop a geometrical method for their optimization, referred to as the “node orientation optimization” method throughout this article. Using the mentioned method, a series of optimizations are carried out in a number of free-form lattice space structures and the results are studied.","PeriodicalId":34964,"journal":{"name":"International Journal of Space Structures","volume":"38 1","pages":"101 - 128"},"PeriodicalIF":0.0,"publicationDate":"2023-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43565659","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

Snap-interlock module system: Exploring an alternative architectural construction method 卡扣联锁模块系统:探索另一种建筑施工方法

International Journal of Space Structures Pub Date : 2023-01-15 DOI: 10.1177/09560599221147468

Jin Young Song, D. Vrana, S. Heo, Xiangdong He, J. Shim

{"title":"Snap-interlock module system: Exploring an alternative architectural construction method","authors":"Jin Young Song, D. Vrana, S. Heo, Xiangdong He, J. Shim","doi":"10.1177/09560599221147468","DOIUrl":"https://doi.org/10.1177/09560599221147468","url":null,"abstract":"Responding to the rise of temporary architecture motivated by fast changing cultural and societal interests, construction methods must be adapted to meet the needs of reconfigurable systems. The prototype of Snap-Interlock Module System (SIMS) proposed in this study aims to integrate the simplicity of dry stacking as a primitive construction method through a coordinated joint system in order to increase material efficiency and structural integrity. This study explores a method of stacking blocks using unique interconnecting mechanisms without bonding agents to allow for reconfigurability. The considered unit of SIMS is configured to have four legs with integrated hooks on both top and bottom, allowing each block to snap into four adjacent blocks on either end. The centerpiece is designed such that each block can individually possess geometric versatility toward organic growth of the whole system. Larger assemblies of SIMS blocks can create full-scale structures without the use of bolting, welding, or other bonding agents. Finite element analysis demonstrates that the explored interlocking motion falls into the elastic range of the considered steel and confirms that structural integrity can be secured at the building scale as well. In order to test the proof-of-concept, 1:3 scaled Polylactic Acid (PLA) blocks are 3D printed and assembled into a 2.5 m tall portal frame, leading to a full-scale structural model executed with six full-scale steel blocks. The assembly and disassembly of both prototype structures are easily executed by a single individual. Despite the limitations of the chosen fabrication methods and material choices, the study promises diverse applications in the changing urban context and contributes to the broader sustainability of our built environment via an alternative and reconfigurable construction method.","PeriodicalId":34964,"journal":{"name":"International Journal of Space Structures","volume":"38 1","pages":"129 - 140"},"PeriodicalIF":0.0,"publicationDate":"2023-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43344742","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

Development, realization, and experimental validation of an active hybrid roof structure based on elastic kinetic and rigid-body transformation 基于弹性动力学和刚体变换的主动混合顶板结构的研制、实现及实验验证

International Journal of Space Structures Pub Date : 2022-11-24 DOI: 10.1177/09560599221134286

P. Marker, R. Jirasek, Therese Schmidt, A. Bleicher

引用次数: 1

On designing plane-faced funicular gridshells 平面索道网壳的设计

International Journal of Space Structures Pub Date : 2022-11-03 DOI: 10.1177/09560599221126656

Cameron Millar, T. Mitchell, A. Mazurek, Ashpica Chhabra, A. Beghini, J. Clelland, A. McRobie, W. Baker

引用次数: 4

An analysis of the elastic-plastic seismic response of inner and outer cable-supported latticed shell structures 内外索支撑网壳结构弹塑性地震反应分析

International Journal of Space Structures Pub Date : 2022-11-03 DOI: 10.1177/09560599221132498

G. Ma, Yunlong Yao, Guangen Zhou, Xiaocheng Bao

{"title":"An analysis of the elastic-plastic seismic response of inner and outer cable-supported latticed shell structures","authors":"G. Ma, Yunlong Yao, Guangen Zhou, Xiaocheng Bao","doi":"10.1177/09560599221132498","DOIUrl":"https://doi.org/10.1177/09560599221132498","url":null,"abstract":"This paper studies the elastic-plastic seismic response of 12 inner and outer cable-supported latticed shell structures under fortification intensity and rare earthquakes. The influencing factors of the 12 models were analyzed. These included span, initial pretension, bottom structure form, connection condition of support, rise-span ratio, and inner cable-supported latticed shell span. Based on the calculation results, we summarize the plastic region of the top latticed shell and the plastic development extent under 7-degree and 8-degree fortification intensity and rare earthquakes, the post-seismic cable force changes, and the development characteristics and distribution rules of residual deformation of top latticed shell. Our investigation indicates that the span, bottom structure form, and connection condition of the support are most sensitive to the elastic-plastic response of the inner and outer cable-supported latticed shell. A strong earthquake can cause a loss of pretension, which primarily happens at inner looped cables and inner inclined cables of the inner cable-supported latticed shell. Cable force change is more sensitive to the asymmetric bottom structure, the latticed shell with a high rise-span ratio, and the span of the inner cable-supported latticed shell. The inner and outer cable-supported latticed shell model loses less cable force after a strong earthquake, and the post-seismic loss ratio is less than 10%, even under the impact of a severe, 9-degree earthquake.","PeriodicalId":34964,"journal":{"name":"International Journal of Space Structures","volume":"38 1","pages":"64 - 79"},"PeriodicalIF":0.0,"publicationDate":"2022-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42955214","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

Strengthening techniques for masonry domes: A review 圬工圆顶加固技术综述

International Journal of Space Structures Pub Date : 2022-10-18 DOI: 10.1177/09560599221126652

A. Bayraktar, Serap Bayraktar, Emin Hökelekli

引用次数: 2