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Dissertations / Theses on the topic 'DISSIPATIVE BRACES'

Author: Grafiati

Published: 1 April 2023

Last updated: 26 July 2025

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1

MIANI, MARCO. "INNOVATIVE SEISMIC PROTECTION OF EXISTING BUILDINGS BY MEANS OF DISSIPATIVE AND SHAPE MEMORY ALLOY BRACES." Doctoral thesis, Università degli Studi di Trieste, 2021. http://hdl.handle.net/11368/2998141.

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The characterization, conservation and securing of heritage buildings has become a very important issue in many countries, as it is in Italy, where a great number of existing constructions, also of historical-artistic importance, are seismically vulnerable. Knowledge of the history, and geometric and mechanical characteristics are fundamental aspects to assess the state of a construction and to analyse possible interventions. In the first part of this thesis, the techniques of survey and mechanical characterization of the materials are analysed, and the costs of carrying out the materials’ tes

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2

COSTOLI, IACOPO. "Criteri di progetto e casi applicativi di miglioramento sismico di edifici con struttura a telaio mediante controventi dissipativi includenti smorzatori fluido-viscosi." Doctoral thesis, Università degli Studi di Trieste, 2022. http://hdl.handle.net/11368/3032058.

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This dissertation was aimed at revisiting and integrating energy-based design criteria of dissipative bracing systems incorporating fluid-viscous spring-dampers as protective devices, for the seismic retrofit of frame structures. This objective was pursued by means of two main contributions. The first one concerned the introduction of an additional pre-sizing criterion of these systems aimed at guaranteeing a prompt activation of the spring-dampers starting from the early stages of the seismic response of the buildings where they are installed. The second one consisted in the evaluation of the

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3

Voller, Gordon Paul. "Analysis of heat dissipation from railway and automotive friction brakes." Thesis, Brunel University, 2003. http://bura.brunel.ac.uk/handle/2438/5558.

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The thesis presents research into the understanding and improvement of heat dissipation from friction brakes. The investigations involved two brake types, considered to be the most thermally loaded and therefore most challenging; axle mounted high speed railway and commercial vehicle disc brakes. All three modes of heat transfer (conduction, convection and radiation) and airflow characteristics have been analysed experimentally and theoretically in order to increase the understanding of heat dissipation. Despite the very practical aspects of this research, a 'generic heat transfer approach' wa

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4

Jeffers, Brandon. "Parametric Study of Self-Centering Concentrically-Braced Frames with Friction-Based Energy Dissipation." University of Akron / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=akron1335901155.

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5

Reed, Matthew Robert. "Development of an Improved Dissipative Passive Haptic Display." Thesis, Georgia Institute of Technology, 2003. http://hdl.handle.net/1853/5284.

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This project focuses on the design and modeling of a two degree-of-freedom dissipative passive haptic display. Haptic displays are man-machine interfaces that transmit forces to the human operator. A dissipative passive haptic display is one that may only remove energy from the system using actuators such as brakes and dampers, thus ensuring the safety of the human operator. These devices may be used to implement virtual constraints such as desired paths and obstacles. Traditional friction brakes have previously been used as dissipative and coupling elements in a two degree-of-freedom para

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6

Fiocchi, Alice. "Inserimento di controventi dissipativi in acciaio in un capannone in calcestruzzo armato prefabbricato a due piani." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2016.

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In questa tesi si propone il miglioramento sismico di un capannone in calcestruzzo armato prefabbricato a due piani a pilastri isostatici mediante l'inserimento di controventi dissipativi in acciaio con forma speciale (Crescent-Shaped-Braces). PREMESSA In primo luogo si dimostra come la struttura studiata soddisfi già i requisiti del DM 2008, sia allo SLD (spostamenti d’ interpiano) che allo SLV (elementi strutturali verificati). OBIETTIVO Migliorare le caratteristiche prestazionali di un edificio in calcestruzzo armato prefabbricato a due piani, sottoposto ad azione sismica.

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7

Barbieri, Laura. "Studio del comportamento sismico di edifici in CLT con connessioni dissipative del tipo X-bracket." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2018.

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La risposta sismica degli edifici CLT è analizzata con lo scopo di valutare la correlazione tra la capacità dissipativa, rappresentata dal fattore di comportamento q, e la metodologia di costruzione, ovvero le proprietà geometriche dell'edificio ed il comportamento delle connessioni adottate. Questo studio presenta un modello numerico in grado di simulare la risposta dinamica di una parete a tre piani costituita da pannelli portanti a strati incrociati, nella quale sono state utilizzate connessioni innovative, rappresentate da staffe ad alta capacità dissipativa caratterizzate da una partico

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8

Tonini, Chiara. "Studio di un collegamento trave-pilastro di tipo semirigido dissipativo." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2018.

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L'elaborato di tesi tratta lo studio di un collegamento trave-pilastro di tipo semirigido dissipativo. L’idea progettuale alla base di tale studio è quella di posizionare nel nodo trave-pilastro di un telaio in acciaio una coppia di dispositivi metallici che durante il sisma si snervino prima dei pilastri. In tal caso infatti si concentrerebbe parte della dissipazione energetica in tali dispositivi ritardando la formazione delle cerniere plastiche alla base dei pilastri e preservando quindi questi ultimi dalla plasticizzazione. Lo studio è stato effettuato considerando come dispositivi metalli

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9

PHAM, Chi-Tuong. "Stabilité et dynamique d'écoulements de fluides parfaits barotropes autour d'un obstacle en présence de dispersion." Phd thesis, Université Pierre et Marie Curie - Paris VI, 2003. http://tel.archives-ouvertes.fr/tel-00006825.

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Cette thèse regroupe une série de travaux ayant tous trait à des systèmes hamiltoniens non linéaires spatialement étendus présentant une bifurcation nœud-col. Elle est constituée de deux parties. Nous étudions dans une première partie la transition à la dissipation de systèmes unidimensionnels soumis à un forçage local et régis par des équations de type sine-Gordon ou Schrödinger non linéaire (ESNL). Nous en calculons analytiquement les solutions stationnaires et caractérisons le comportement dynamique au voisinage de celles-ci près de la bifurcation. Lorsque la relation de dispersion des syst

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10

Simon, Madrenas Enric. "Predicción de la fatiga de disipadores de energía elastoplásticos para estructuras sismorresistentes." Doctoral thesis, Universitat de Girona, 2021. http://hdl.handle.net/10803/673931.

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Elastoplastic energy dissipators are used in earthquake-resistant design in order to dissipate a substantial part of the seismic energy acting on a building. They are elements that are not part of the load-bearing structure and, therefore, are easily replaceable in case of damage. Their behaviour is usually stable and their degree of degradation difficult to appreciate visually. To assess their degree of degradation, damage indices are used which estimate their remaining dissipative capacity through the combination of a number of variables such as, for example, the number of cycles sustained a

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11

Chen, Ying-Chuan, and 陳映全. "Development and Validation for Double-Core Self-Centering Energy Dissipative Braces." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/15652067921497178408.

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碩士<br>國立臺灣大學<br>土木工程學研究所<br>100<br>Self-Centering Energy Dissipative Brace is a kind of brace which uses tendons to constrain compression elements of the brace and provide self-centering properties under tension and compression force (restore to zero residual deformation). Traditional self-centering energy dissipative brace’s deformation capacity relies on the elastic deformation capacity of the tendons used inside the brace, and results in limitation of the braces’ deformability. Traditional SCED brace has a maximum strain of 1.3% when the tendons reach 1.9% strain and the frame reaches 2% in

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12

RAHMAT, RABI RAIHAN. "Proposal of energy-based method for the design of passive energy dissipative braces." Doctoral thesis, 2020. http://hdl.handle.net/11573/1359668.

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Earthquake-prone regions of the world are usually characterized by a high number of Reinforced Concrete (RC) buildings designed before seismic building codes were enforced. As a result, the amount of existing RC buildings requiring seismic assessment and likely retrofitting is large. The use of innovative techniques for the seismic amelioration of existing RC buildings has been attracting the attention of both academic and technical communities since the second half of the previous century. Among these techniques there is the employment of passive energy dissipating devices that are mounted in

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13

Erochko, Jeffrey A. "Improvements to the Design and Use of Post-tensioned Self-centering Energy-dissipative (SCED) Braces." Thesis, 2013. http://hdl.handle.net/1807/35815.

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The self-centering energy dissipative (SCED) brace is an innovative cross-bracing system that eliminates residual building deformations after seismic events and prevents the progressive drifting that other inelastic systems are prone to experience under long-duration ground motions. This research improves upon the design and use of SCED braces through three large-scale experimental studies and an associated numerical building model study. The first experimental study increased the strength capacity of SCED braces and refined the design procedure through the design and testing of a new high-cap

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14

Chao-Ju, Tsai, and 蔡兆茹. "Application of Energy Dissipation Devices to Braces Steel Structures." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/29576020652347397857.

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15

Yu, You-Sheng, and 於祐生. "Design and Seismic Performance Test of Energy-Dissipative Brace." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/649p2r.

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碩士<br>國立交通大學<br>土木工程系所<br>107<br>Installation of displacement-dependent structural dampers will increase the stiffness of the entire structure, change its fundamental period and, as a consequence, affect the seismic design load. In light of the fact that design of seismic dampers cannot be independent of the structures, this study develops a damper design procedure that takes into account the structural system as a whole to serve as reference hopefully for practical application. This thesis proposes a two-stage damper design procedure including the preliminary design and detail design. Firstly

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16

Chia-Chieh, Hu, and 胡家杰. "Application of Ductile Braces for Seismic Energy Dissipation of Structures." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/f2csq4.

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碩士<br>國立交通大學<br>土木工程系所<br>96<br>Buckling is usually conceived as an unstable structural behavior leading to lateral instability of axially loaded members if not properly supported. However, if a buckled strut is deformed in a guided direction and range, geometrical large lateral deformation of the steel struts in buckling will lead to inelastic behavior of the material and dissipate energy as a consequence. The purpose of this study is to develop a new type of seismic damper, named ductile braces, based on the concept of the geometrical deformation and the inelastic behavior of the material of

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17

Lai, Jiun-Wei, and 賴俊維. "A Study of Energy Dissipating Steel Concentric Braced Frames." Thesis, 2001. http://ndltd.ncl.edu.tw/handle/57560427701373072642.

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碩士<br>國立臺灣大學<br>土木工程學研究所<br>89<br>In recent years, a number of researches have revealed that the buckling restrained braced frame (BRBF) is an effective system for server seismic application. Buckling restrained bracing (BRB) members can be conveniently made from various kinds of structural steel shapes encased in steel tube and confined by infill concrete. When the brace is subjected to compressions, an unbonding material placed between the core bracing and the concrete infill is required in order to reduce the friction while restrain the bracing from buckling. 　In this research, a combined e

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18

Danila, Nicolae Ionel. "NUMERICAL MODELING AND DESIGN OF LOW-RISE CONCENTRICALLY BRACED FRAMES WITH DOUBLE-PIN DISSIPATIVE CONNECTIONS." Thesis, 2013. http://spectrum.library.concordia.ca/978223/10/Danila_MASc_S2014.pdf.

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Concentrically braced frames, CBFs, are the most popular systems used in seismic areas in Canada, due to their large stiffness. However, after braces buckle in compression, their stiffness is significantly reduced and their hysteresis response, displayed in terms of force-displacement, shows an asymmetric behavior. To overcome this drawback, researchers proposed to add fuses that were conceived to be installed either in braces or brace-to-frame connections. The purpose of these fusses is to dissipate the earthquake input energy, while preserving braces to respond in elastic range. In this thes

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19

Caprarelli, Cristina. "Modelling and Design of Earthquake Resistant Low-Rise Concentrically Braced Frames with Dissipative Single-Pin Connections." Thesis, 2012. http://spectrum.library.concordia.ca/974716/4/Caprarelli_MASc_F2012.pdf.

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20

Wan, Jia-Wen, and 萬家汶. "Development and Test Validation of a Self-Centering Brace with Energy-Dissipating Bars." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/y6eq8v.

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碩士<br>國立臺灣大學<br>土木工程學研究所<br>106<br>Earthquake-resisting frame systems that are designed based on current seismic provisions provide life safety performance in a large earthquake, but may have signiﬁcant structural damage or residual drift due to large energy dissipation in designated structural members. The damage leads to difﬁcult or expensive to repair after a large earthquake. Therefore, the development of a structural system that has both energy dissipation and self-centering properties in earthquakes is needed to improve the seismic performances of buildings. This new invention in present

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21

Lee, Yu-Chen, and 李妤蓁. "Seismic Performance of Steel Knee Braced Frame Structures with Energy Dissipation Plates and Steel Curved Dampers." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/42pb5g.

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碩士<br>國立中央大學<br>土木工程學系<br>107<br>This study focused on the performance evaluation and FEM analysis of steel knee braced frames with curved dampers. The purpose of this study is to prevent the formation of plastic hinges on the beam of traditional knee braced frames. Hence, a new design was proposed. In order to validate the effectiveness of the proposed knee braced frames, a series of cyclic loading tests with various damper dimensions were conducted. According to the experimental results, this design could maintain the main structures in elastic stage. Also, the results showed that significan

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