“…The mortise-tenon connection is commonly used in traditional Chinese wood structures. Due to the unique structure of the mortise-tenon connection and the characteristics of the wood itself, the mortise-tenon joints in wood structures typically exhibit good ductility and corresponding seismic performance [32][33][34]. However, mortise-tenon connections in wood structures are typically crafted by hand, and the specialized nature of these connections hampers the applications of diverse types of existing precast concrete structures.…”
This paper introduces a novel type of connection that integrates unbonded prestressed strands (UPS) and mortise-tenon in an assembly frame structure (UPS-MTF). First, the damage process and failure modes of the joints under reciprocating horizontal loads were systematically analyzed using refined numerical models. The recommended values of the design parameters of the joints were derived from the parametric analysis results. Refined numerical modeling results reveal the diagonal compression strut mechanism within the core region of the joint. The diagonal compression struts model assists in establishing the theoretical calculation formula for the skeleton curve of shear stress–strain in the core region. Second, a genetic algorithm (GA) parameter was identified for the restoring force model of the core region to determine the parameters of the hysteresis rules. Finally, a macro-simplified analytical model of the joint was created based on the restoring force model of the core region, and parameter analysis was conducted to verify the applicability of this macro-simplified analytical model. The research results prove that the damaged form of the joint proposed in this paper originates from the shear and relative slip damage between the components in the core region. The axial compression ratio significantly affects the hysteretic performance of the joints, and the upper and lower limit values were identified for the axial compression ratio of the joints. The area and initial effective stress of the UPS exert a minimal effect on the hysteretic performance of the joint. Based on the method proposed in this paper for determining the restoring force model in the core region of the joints, the hysteresis curves obtained from the macro-simplified analytical model closely match the refined numerical analysis model results. This correspondence verifies the applicability of the macro-simplified analytical model.
“…The mortise-tenon connection is commonly used in traditional Chinese wood structures. Due to the unique structure of the mortise-tenon connection and the characteristics of the wood itself, the mortise-tenon joints in wood structures typically exhibit good ductility and corresponding seismic performance [32][33][34]. However, mortise-tenon connections in wood structures are typically crafted by hand, and the specialized nature of these connections hampers the applications of diverse types of existing precast concrete structures.…”
This paper introduces a novel type of connection that integrates unbonded prestressed strands (UPS) and mortise-tenon in an assembly frame structure (UPS-MTF). First, the damage process and failure modes of the joints under reciprocating horizontal loads were systematically analyzed using refined numerical models. The recommended values of the design parameters of the joints were derived from the parametric analysis results. Refined numerical modeling results reveal the diagonal compression strut mechanism within the core region of the joint. The diagonal compression struts model assists in establishing the theoretical calculation formula for the skeleton curve of shear stress–strain in the core region. Second, a genetic algorithm (GA) parameter was identified for the restoring force model of the core region to determine the parameters of the hysteresis rules. Finally, a macro-simplified analytical model of the joint was created based on the restoring force model of the core region, and parameter analysis was conducted to verify the applicability of this macro-simplified analytical model. The research results prove that the damaged form of the joint proposed in this paper originates from the shear and relative slip damage between the components in the core region. The axial compression ratio significantly affects the hysteretic performance of the joints, and the upper and lower limit values were identified for the axial compression ratio of the joints. The area and initial effective stress of the UPS exert a minimal effect on the hysteretic performance of the joint. Based on the method proposed in this paper for determining the restoring force model in the core region of the joints, the hysteresis curves obtained from the macro-simplified analytical model closely match the refined numerical analysis model results. This correspondence verifies the applicability of the macro-simplified analytical model.
O uso de estruturas de madeira é amplamente difundido em países localizados no Hemisfério Norte. A grande utilização da madeira é justificada por apresentar alta relação resistência e peso, baixo consumo de energia e confiabilidade em aplicações estruturais. No Brasil, apesar da extensa quantidade de espécies no território o uso se restringe em estruturas treliçadas de telhados. No entanto, a combinação da madeira com as tecnologias atuais permite a utilização desse material em estruturas de grandes dimensões. Grandes estruturas, em altura e/ou em vão, requerem elementos estruturais com grandes seções transversais e conexões entre os elementos. Portanto, as conexões se tornaram um importante e usual elemento nessas estruturas. Com o objetivo de melhorar o comportamento estrutural das peças de madeira, diversas pesquisas utilizam materiais compósitos reforçados com fibras, sendo os principais: Fibra de vidro (GFRP) e Fibra de Carbono (CFRP). A utilização desses materiais provoca o aumento de resistência dos componentes estruturais. Esses materiais utilizados para reforços são disponibilizados em formatos e tamanhos diversos, como: lâminas, tecidos, chapas e barras. Este artigo tem como finalidade apresentar uma Revisão Sistemática de Literatura (RSL), produzida nos últimos anos, com pesquisas relacionadas às áreas de ligações em estruturas de madeira e o uso de materiais compósitos. As pesquisas por trabalhos nesta temática compreenderam literatura internacional, considerando os anos de 2010 a 2023. O processo de RSL foi realizado com o auxílio do software StArt. Após a realização da RSL verificou que as conexões são os pontos que apresentam a maiores condições para colapso da estrutura, grande parte das pesquisas analisam o comportamento mecânico de ligações utilizando se simulação numérica. O uso de materiais compósitos se destaca como reforços de estruturas, sendo pouco utilizado como reforço nas conexões.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.