摘 要 經過近幾年來對於挫屈束制支撐(BRB)之相關研究，可以證實此種消能斜撐確實為一種十分有效的耐震消能元件。因其在受壓時並不會產生挫屈的現象，所以在反覆加載之下可以產生相當飽滿的遲滯迴圈行為... more 摘 要 經過近幾年來對於挫屈束制支撐(BRB)之相關研究，可以證實此種消能斜撐確實為一種十分有效的耐震消能元件。因其在受壓時並不會產生挫屈的現象，所以在反覆加載之下可以產生相當飽滿的遲滯迴圈行為，同時消散大量的能量。近幾年來在台灣、日本與美國此種斜撐皆已漸漸被廣泛的使用。 但在過去的相關研究當中，挫屈束制支撐往往是以單軸拉壓的方式進行構件試驗，而在構架試驗方面略顯不足。此外，若要能夠真實反應出斜撐於結構物中不同樓層之行為，採用一樓一跨的試驗模式已不足夠，必須以三層樓之構架來進行試驗才能更確實的呈現出真實結構之行為。 因此，本研究即為一個實尺寸三層樓之挫屈束制支撐構架試驗，希望透過如此的試驗更加了解挫屈束制支撐於結構中之行為。而本研究的主要項目有：1)探討整體構架之行為，將試驗結果與分析軟體所預測之結果以誤差分析的方式作比較，且進一步改善預測分析之模型，以建立更準確之解析模型，可提供未來分析模擬之參考。2)檢討挫屈束制支撐於構架當中是各項行為表現，包括接合板之行為與分析、斜撐消能情形、斜撐累積塑性韌性表現、斜撐端部轉角、不平衡力與斜撐韌性等。3)以構件試驗的方式，研究新式脫層材料與脫層厚度對挫屈束制支撐之行為影響。希望透過本次的試驗與分析結果，提供未來相關研究與相關規範之參考依據。In recent years, a lot of researches concerning BRB(Buckling Restrained Braces) confirmed that BRBs are effective components resisting earthquakes. It’s because the BRBs won’t buckle with applied compression axial force, they can develop full hysteresis and dissipate lots of energy. BRBs have been used gradually in recent years including Taiwan, Japan and United States. In past researches, the experiments of BRBs were always component tests by a...
Special concentrically braced frames (SCBFs) are commonly used for seismic design of buildings. T... more Special concentrically braced frames (SCBFs) are commonly used for seismic design of buildings. Their large elastic stiffness and strength efficiently sustains the seismic demands during smaller, more frequent earthquakes. During large, infrequent earthquakes, SCBFs exhibit highly nonlinear behavior due to brace buckling and yielding and the inelastic behavior induced by secondary deformation of the framing system. These response modes reduce the system demands relative to an elastic system without supplemental damping using a response modification coefficient, commonly termed the R factor. More recently, procedures put forth in FEMAP695 have been made to quantify the R factor through a formalized procedure that accounts for collapse potential. The primary objective of the research in this paper was to evaluate the approach for SCBFs. An improved model for SCBFs that permits simulation of brace fracture was used to conduct response history analyses. A series of 3-, 9- and 20-story S...
… First International Conference on Advances in …, 2005
Buckling-restrained braced frames (BRBF) have gained notable acceptance in Taiwan recently becaus... more Buckling-restrained braced frames (BRBF) have gained notable acceptance in Taiwan recently because of its excellent seismic performance and cost-effectiveness. Compare to the traditional concentric braces, buckling-restrained braces (BRBs) have a high compression strength similar to the tension yielding behavior. The gusset connections must be designed to prevent instabilities when transmit high compression forces of the BRBs. In this paper, experimental behavior of a buckled gusset connections in a full-scale 3-story 3-bay CFT/BRB frame specimen tested in the structural laboratory of NCREE is presented, theoretical study and finite element analysis of gusset connections are also described in this paper. In order to investigate the BRBF system subjected to the bi-directional earthquake loads, a full-scale 2-story single-bay BRBF specimen has been constructed for testing in March of 2005. In order to examine the effectiveness of various stiffening schemes for the gusset plate, results of the finite element analysis are presented. It's illustrated from the gusset plate buckling analysis that proper stiffeners are effective to increase the buckling strength of the gusset plate.
In this research, a protective concrete-filled steel plate composite wall (PSC) is developed, con... more In this research, a protective concrete-filled steel plate composite wall (PSC) is developed, consisting of a core concrete-filled bilateral steel plate composite shear wall and two lateral replaceable surface steel plates with energy-absorbing layers. The PSC wall is characterised by high in-plane seismic performance as well as out-of-plane impact performance. Therefore, it could be employed primarily in high-rise constructions, civil defence initiatives, and buildings with stringent structural safety criteria. To investigate the out-of-plane low-velocity impact behaviour of the PSC wall, fine finite element models are validated and developed. Then, the influence of geometrical and dynamic loading parameters on its impact behaviour is investigated. The results show that the replaceable energy-absorbing layer could significantly decrease the out-of-plane displacement and plastic displacement of the PSC wall due to its large plastic deformation, which could absorb a significantly lar...
Moment resisting stub columns (MRSCs) have increasingly adopted in special moment-resisting frame... more Moment resisting stub columns (MRSCs) have increasingly adopted in special moment-resisting frame (SMF) systems in steel building structures, especially in Asian countries. The MRSCs typically provide a lower deformation capacity compared to shear-panel stub columns, a limited post-yield stiffness, and severe strength degradation as adopting slender webs. A new MRSC design with cored configuration, consisting of a core-segment and two side-segments using different steel grades, has been proposed in the study to improve the demerits mentioned above. Several full-scale components of the cored MRSC were experimentally investigated focusing on the hysteretic performance of plastic hinges at the ends. The effects of the depths of the core-segment and the adopted reduced column section details on the hysteretic behavior of the components were examined. The measured hysteretic responses verified that the cored MRSC enabled to provide early yielding, great ductility and energy dissipation, ...
Resumo Introdução: A Disfunção Temporomandibular (DTM) é um quadro patológico que afeta o sistema... more Resumo Introdução: A Disfunção Temporomandibular (DTM) é um quadro patológico que afeta o sistema estomatognático e, frequentemente, acompanhada de dor. Objetivos: Aferir o nível de dor dos pacientes portadores de DTM e a prevalência de sintomatologia articular e muscular. Percebeu-se que a relação entre a origem da DTM e a sintomatologia dolorosa é pouco relatada na literatura. Materiais e Métodos: Trata-se de um estudo descritivo, observacional de corte transversal, desenvolvido com 30 pacientes com DTM, diagnosticado pelo Research Diagnostic Criteria for Temporomandibular Disorders (RDC/TMD). A amostra foi determinada pelas estimativas de atendimento. A associação entre a sintomatologia e a origem da DTM foram verificadas através do teste qui-quadrado, com intervalos de confiança (95%). Foi usada uma ficha clínica para a coleta de dados com idade, gênero e nível da dor, que foi aferido através da Escala Visual Analógica de dor. Resultados: Constatou-se que 26 pacientes eram do sexo feminino e 4 do sexo masculino. Quinze apresentaram idade inferior a 36,5 anos, e os outros uma idade superior a esta. Quanto a origem da DTM, 19 tinham desordem articular e 11 muscular. A categoria moderada foi o nível mais prevalente, seguida do intenso. Determinou-se que não houve associação estatisticamente significante entre as variáveis deste estudo com a DTM. Conclusão: Constatou-se que, os fatores etiológicos analisados isoladamente não influenciam de forma única no desenvolvimento da DTM, mas poderão atuar em conjunto com outros fatores, já que a sua causa é multifatorial. Descritores: Dimensão Vertical; Boca Edêntula; Dor Facial; Síndrome da Disfunção da Articulação Temporomandibular.
IEEE Wireless Communications and Networking Conference, 2005
AbstractAn effective, efficient and distributed fuzzy control algorithm is proposed to perform c... more AbstractAn effective, efficient and distributed fuzzy control algorithm is proposed to perform control over the contention parameters in the IEEE 802.11 media access control (MAC) layer for supporting Quality of Service (QoS) in wireless communications. The proposed fuzzy ...
Chapter 4 High Performance Steel Material and Structures for Earthquake Resistant Buildings Keh-C... more Chapter 4 High Performance Steel Material and Structures for Earthquake Resistant Buildings Keh-Chyuan Tsai, Ying-Cheng Lin, Jui-Liang Lin, Sheng-Lin Lin and Po-Chien Hsiao National Center for Research on Earthquake Engineering, Taipei, Taiwan 4.1 Introduction 4.1. 1 ...
摘 要 經過近幾年來對於挫屈束制支撐(BRB)之相關研究，可以證實此種消能斜撐確實為一種十分有效的耐震消能元件。因其在受壓時並不會產生挫屈的現象，所以在反覆加載之下可以產生相當飽滿的遲滯迴圈行為... more 摘 要 經過近幾年來對於挫屈束制支撐(BRB)之相關研究，可以證實此種消能斜撐確實為一種十分有效的耐震消能元件。因其在受壓時並不會產生挫屈的現象，所以在反覆加載之下可以產生相當飽滿的遲滯迴圈行為，同時消散大量的能量。近幾年來在台灣、日本與美國此種斜撐皆已漸漸被廣泛的使用。 但在過去的相關研究當中，挫屈束制支撐往往是以單軸拉壓的方式進行構件試驗，而在構架試驗方面略顯不足。此外，若要能夠真實反應出斜撐於結構物中不同樓層之行為，採用一樓一跨的試驗模式已不足夠，必須以三層樓之構架來進行試驗才能更確實的呈現出真實結構之行為。 因此，本研究即為一個實尺寸三層樓之挫屈束制支撐構架試驗，希望透過如此的試驗更加了解挫屈束制支撐於結構中之行為。而本研究的主要項目有：1)探討整體構架之行為，將試驗結果與分析軟體所預測之結果以誤差分析的方式作比較，且進一步改善預測分析之模型，以建立更準確之解析模型，可提供未來分析模擬之參考。2)檢討挫屈束制支撐於構架當中是各項行為表現，包括接合板之行為與分析、斜撐消能情形、斜撐累積塑性韌性表現、斜撐端部轉角、不平衡力與斜撐韌性等。3)以構件試驗的方式，研究新式脫層材料與脫層厚度對挫屈束制支撐之行為影響。希望透過本次的試驗與分析結果，提供未來相關研究與相關規範之參考依據。In recent years, a lot of researches concerning BRB(Buckling Restrained Braces) confirmed that BRBs are effective components resisting earthquakes. It’s because the BRBs won’t buckle with applied compression axial force, they can develop full hysteresis and dissipate lots of energy. BRBs have been used gradually in recent years including Taiwan, Japan and United States. In past researches, the experiments of BRBs were always component tests by a...
Special concentrically braced frames (SCBFs) are commonly used for seismic design of buildings. T... more Special concentrically braced frames (SCBFs) are commonly used for seismic design of buildings. Their large elastic stiffness and strength efficiently sustains the seismic demands during smaller, more frequent earthquakes. During large, infrequent earthquakes, SCBFs exhibit highly nonlinear behavior due to brace buckling and yielding and the inelastic behavior induced by secondary deformation of the framing system. These response modes reduce the system demands relative to an elastic system without supplemental damping using a response modification coefficient, commonly termed the R factor. More recently, procedures put forth in FEMAP695 have been made to quantify the R factor through a formalized procedure that accounts for collapse potential. The primary objective of the research in this paper was to evaluate the approach for SCBFs. An improved model for SCBFs that permits simulation of brace fracture was used to conduct response history analyses. A series of 3-, 9- and 20-story S...
… First International Conference on Advances in …, 2005
Buckling-restrained braced frames (BRBF) have gained notable acceptance in Taiwan recently becaus... more Buckling-restrained braced frames (BRBF) have gained notable acceptance in Taiwan recently because of its excellent seismic performance and cost-effectiveness. Compare to the traditional concentric braces, buckling-restrained braces (BRBs) have a high compression strength similar to the tension yielding behavior. The gusset connections must be designed to prevent instabilities when transmit high compression forces of the BRBs. In this paper, experimental behavior of a buckled gusset connections in a full-scale 3-story 3-bay CFT/BRB frame specimen tested in the structural laboratory of NCREE is presented, theoretical study and finite element analysis of gusset connections are also described in this paper. In order to investigate the BRBF system subjected to the bi-directional earthquake loads, a full-scale 2-story single-bay BRBF specimen has been constructed for testing in March of 2005. In order to examine the effectiveness of various stiffening schemes for the gusset plate, results of the finite element analysis are presented. It's illustrated from the gusset plate buckling analysis that proper stiffeners are effective to increase the buckling strength of the gusset plate.
In this research, a protective concrete-filled steel plate composite wall (PSC) is developed, con... more In this research, a protective concrete-filled steel plate composite wall (PSC) is developed, consisting of a core concrete-filled bilateral steel plate composite shear wall and two lateral replaceable surface steel plates with energy-absorbing layers. The PSC wall is characterised by high in-plane seismic performance as well as out-of-plane impact performance. Therefore, it could be employed primarily in high-rise constructions, civil defence initiatives, and buildings with stringent structural safety criteria. To investigate the out-of-plane low-velocity impact behaviour of the PSC wall, fine finite element models are validated and developed. Then, the influence of geometrical and dynamic loading parameters on its impact behaviour is investigated. The results show that the replaceable energy-absorbing layer could significantly decrease the out-of-plane displacement and plastic displacement of the PSC wall due to its large plastic deformation, which could absorb a significantly lar...
Moment resisting stub columns (MRSCs) have increasingly adopted in special moment-resisting frame... more Moment resisting stub columns (MRSCs) have increasingly adopted in special moment-resisting frame (SMF) systems in steel building structures, especially in Asian countries. The MRSCs typically provide a lower deformation capacity compared to shear-panel stub columns, a limited post-yield stiffness, and severe strength degradation as adopting slender webs. A new MRSC design with cored configuration, consisting of a core-segment and two side-segments using different steel grades, has been proposed in the study to improve the demerits mentioned above. Several full-scale components of the cored MRSC were experimentally investigated focusing on the hysteretic performance of plastic hinges at the ends. The effects of the depths of the core-segment and the adopted reduced column section details on the hysteretic behavior of the components were examined. The measured hysteretic responses verified that the cored MRSC enabled to provide early yielding, great ductility and energy dissipation, ...
Resumo Introdução: A Disfunção Temporomandibular (DTM) é um quadro patológico que afeta o sistema... more Resumo Introdução: A Disfunção Temporomandibular (DTM) é um quadro patológico que afeta o sistema estomatognático e, frequentemente, acompanhada de dor. Objetivos: Aferir o nível de dor dos pacientes portadores de DTM e a prevalência de sintomatologia articular e muscular. Percebeu-se que a relação entre a origem da DTM e a sintomatologia dolorosa é pouco relatada na literatura. Materiais e Métodos: Trata-se de um estudo descritivo, observacional de corte transversal, desenvolvido com 30 pacientes com DTM, diagnosticado pelo Research Diagnostic Criteria for Temporomandibular Disorders (RDC/TMD). A amostra foi determinada pelas estimativas de atendimento. A associação entre a sintomatologia e a origem da DTM foram verificadas através do teste qui-quadrado, com intervalos de confiança (95%). Foi usada uma ficha clínica para a coleta de dados com idade, gênero e nível da dor, que foi aferido através da Escala Visual Analógica de dor. Resultados: Constatou-se que 26 pacientes eram do sexo feminino e 4 do sexo masculino. Quinze apresentaram idade inferior a 36,5 anos, e os outros uma idade superior a esta. Quanto a origem da DTM, 19 tinham desordem articular e 11 muscular. A categoria moderada foi o nível mais prevalente, seguida do intenso. Determinou-se que não houve associação estatisticamente significante entre as variáveis deste estudo com a DTM. Conclusão: Constatou-se que, os fatores etiológicos analisados isoladamente não influenciam de forma única no desenvolvimento da DTM, mas poderão atuar em conjunto com outros fatores, já que a sua causa é multifatorial. Descritores: Dimensão Vertical; Boca Edêntula; Dor Facial; Síndrome da Disfunção da Articulação Temporomandibular.
IEEE Wireless Communications and Networking Conference, 2005
AbstractAn effective, efficient and distributed fuzzy control algorithm is proposed to perform c... more AbstractAn effective, efficient and distributed fuzzy control algorithm is proposed to perform control over the contention parameters in the IEEE 802.11 media access control (MAC) layer for supporting Quality of Service (QoS) in wireless communications. The proposed fuzzy ...
Chapter 4 High Performance Steel Material and Structures for Earthquake Resistant Buildings Keh-C... more Chapter 4 High Performance Steel Material and Structures for Earthquake Resistant Buildings Keh-Chyuan Tsai, Ying-Cheng Lin, Jui-Liang Lin, Sheng-Lin Lin and Po-Chien Hsiao National Center for Research on Earthquake Engineering, Taipei, Taiwan 4.1 Introduction 4.1. 1 ...
Uploads
Papers by Po-Chien Hsiao