{"id":1292,"date":"2021-07-04T05:09:19","date_gmt":"2021-07-04T05:09:19","guid":{"rendered":"http:\/\/bambutec.com.br\/?p=1292"},"modified":"2023-07-21T21:46:06","modified_gmt":"2023-07-21T21:46:06","slug":"design-and-analysis-of-a-self-supporting-bamboo-roof-structure-applying-flexible-connections","status":"publish","type":"publicacao","link":"http:\/\/bambutec.com.br\/en\/publicacao\/design-and-analysis-of-a-self-supporting-bamboo-roof-structure-applying-flexible-connections\/","title":{"rendered":"Design and analysis of a self-supporting bamboo roof structure applying flexible connections"},"content":{"rendered":"

Proceedings of the IASS Symposium, Creativity in Structural Design, Massachusetts Institute of Technology (MIT), Boston, USA, 2018. Access<\/a>\u00a0>><\/p>\n

M. Seixas; L.E. Moreira; J. Bina; J.L.M. Ripper<\/p>\n

Abstract: Ultralight bamboo structures with flexible joints comprise a novel construction system that can meet the global demand for sustainable buildings, such as multi-use pavilions and temporary structures for disaster relief and humanitarian purposes. In this work, modular self-supporting space frames were designed, fabricated, and experimentally analyzed using bamboo culms, textile ropes, and biocomposite rings. Numerical models and a 1:3 scale prototype were used to investigate the structural response under sustained loadings. The mean values of 5.4\u202fGPa for Young's modulus (E), a specific gravity (G) of 8 kN\/m\u00b3\u202f, and a Poisson's coefficient (\u03bd) of 0.3 were adopted for the bamboo members. The prototype, constructed with two modular space frames, was tested under both symmetric and asymmetric loading conditions during 43-day static tests. A pronounced nonlinear behavior was observed for the symmetric loading of 4.8\u202fkN and the asymmetric loading of 3.5\u202fkN, whereas failure occurred at a total load of 6.5\u202fkN for the asymmetric configuration, 7.5 times the prototype's self-weight. The observed failure of bamboo members was governed by crushing under bending, followed by local buckling of the upper rafters below the load application points. The experimental results were compared with numerical models to determine an effective modeling strategy for reproducing the actual structural behavior. A comparison revealed that the eccentricity of members at the joints must be considered for a reliable prediction and that creep can be accounted for through appropriate reductions in the modulus of elasticity. The observed differences are attributed to the sliding of members at joints under higher loads and due to local second-order effects.<\/strong> The present study investigates a mobile textile bamboo roof structure applying flexible connections. This ultralight structural system built with modular space frames, tensile pantographic grids and lashed joints in polyester ropes and biocomposites, presents a self-supporting behavior. Prefabricated hinged lashed connections (HLC) designed for the structure present a deployable mechanism, free of torsion stresses in the bamboo bars. The study presents research results on the structural design and analysis of the developed self-supporting bamboo structure for the tropical climate. Nonlinear analysis using the finite element method (FEM) presents forces applied in the structure. Static loading patterns for wind loads were investigated and showed that forces can be safety absorbable by the structural members. A numerical model, physical models and full-scale prototypes, simultaneously, investigated the complex mechanical behavior of the bamboo structure, drafting its overall operation and introducing design guidelines.<\/p>","protected":false},"excerpt":{"rendered":"

Proceedings of the IASS Symposium, Creativity in Structural Design, Massachusetts Institute of Technology (MIT), Boston, USA, 2018. Clique para acessar\u00a0>> M. Seixas; L.E. Moreira; J. Bina; J.L.M. Ripper Resumo: The present study investigates a mobile textile bamboo roof structure applying flexible connections. This ultralight structural system built with modular space frames, tensile pantographic grids and […]<\/p>","protected":false},"featured_media":1298,"template":"","format":"standard","categories":[52],"tags":[16,38,30,93,37,85,84,83,94,86],"class_list":["post-1292","publicacao","type-publicacao","status-publish","format-standard","has-post-thumbnail","hentry","category-publicacoes","tag-bamboo","tag-deployable","tag-design","tag-hinged-lashed-connection-hlc","tag-pantographic","tag-roof-structure","tag-self-supporting-space-frame-ssf","tag-structural-analysis","tag-textile","tag-ultralight"],"blocksy_meta":[],"_links":{"self":[{"href":"http:\/\/bambutec.com.br\/en\/wp-json\/wp\/v2\/publicacao\/1292","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/bambutec.com.br\/en\/wp-json\/wp\/v2\/publicacao"}],"about":[{"href":"http:\/\/bambutec.com.br\/en\/wp-json\/wp\/v2\/types\/publicacao"}],"version-history":[{"count":15,"href":"http:\/\/bambutec.com.br\/en\/wp-json\/wp\/v2\/publicacao\/1292\/revisions"}],"predecessor-version":[{"id":1893,"href":"http:\/\/bambutec.com.br\/en\/wp-json\/wp\/v2\/publicacao\/1292\/revisions\/1893"}],"wp:featuredmedia":[{"embeddable":true,"href":"http:\/\/bambutec.com.br\/en\/wp-json\/wp\/v2\/media\/1298"}],"wp:attachment":[{"href":"http:\/\/bambutec.com.br\/en\/wp-json\/wp\/v2\/media?parent=1292"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/bambutec.com.br\/en\/wp-json\/wp\/v2\/categories?post=1292"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/bambutec.com.br\/en\/wp-json\/wp\/v2\/tags?post=1292"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}