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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
11

Odkládací zařízení pro výměnné hlavy obráběcího centra / Stacking device for replaceable heads of maching center

Včelica, Josef January 2008 (has links)
Diploma work deal winth resolution automatic heads for high-speed shaping centers exchangas, so there was not those exchanges need of the human factor. It meaning that will using element automatic interface directly to programme as are Ball screw drives, ball rail systems, hydraulic element atc.
12

Displacement Based Design of Hybrid Coupled Walls with Replaceable Fuses

Muhaisin, Muthana January 2019 (has links)
No description available.
13

Development of the Design of Eccentrically Braced Frames with Replaceable Shear Links

Mansour, Nabil 23 February 2011 (has links)
In current design of steel eccentrically braced frames (EBFs), the yielding link is coupled with the floor beam. This often results in oversized link elements, which leads to over-designed structures and foundations. In addition, the beams are expected to sustain significant damage through repeated inelastic deformations under design level earthquakes, and thus the structure may require extensive repair or need to be replaced. These drawbacks can be mitigated by designing EBFs with replaceable shear links. Two different replaceable link types with alternate section profiles, connection configurations, welding details and intermediate stiffener spacing were tested. A total of 13 cyclic quasi-static full-scale cyclic tests were performed, which included tests on eccentrically braced frames with the replaceable shear links, to study their inelastic seismic performance. The links exhibited a very good ductile behaviour, developing stable and repeatable yielding. Additional inelastic rotation capacity can be achieved with bolted replaceable links when allowing bolt bearing deformations to occur. The on-site replaceability of the link sections is confirmed even in the presence of residual deformations of 0.5% drift.
14

Development of the Design of Eccentrically Braced Frames with Replaceable Shear Links

Mansour, Nabil 23 February 2011 (has links)
In current design of steel eccentrically braced frames (EBFs), the yielding link is coupled with the floor beam. This often results in oversized link elements, which leads to over-designed structures and foundations. In addition, the beams are expected to sustain significant damage through repeated inelastic deformations under design level earthquakes, and thus the structure may require extensive repair or need to be replaced. These drawbacks can be mitigated by designing EBFs with replaceable shear links. Two different replaceable link types with alternate section profiles, connection configurations, welding details and intermediate stiffener spacing were tested. A total of 13 cyclic quasi-static full-scale cyclic tests were performed, which included tests on eccentrically braced frames with the replaceable shear links, to study their inelastic seismic performance. The links exhibited a very good ductile behaviour, developing stable and repeatable yielding. Additional inelastic rotation capacity can be achieved with bolted replaceable links when allowing bolt bearing deformations to occur. The on-site replaceability of the link sections is confirmed even in the presence of residual deformations of 0.5% drift.
15

Třístranně sklápěná korba návěsu / three-sied tipping body of trailer

Peňáz, Jan January 2010 (has links)
This diploma thesis deals with proposal three-side tipping body of tractor semi-trailer with maximum weight 23 tons. In beginning the thesis includes background research part and design of conception body inclusive back door. In the middle part thesis contains the strength calculations using the finite element method, shape optimization and check strength calculation. Strength checks consider especially deformation and strain analysis in different load angle states. The work is finished by analytical calculations included partial body of semi-trailer. Enclosed are graphic illustrations results in program ANSYS Workbench. Part of the thesis is also design documentation. Work is created in co-operation with company ZDT Ltd. Body is designed for universal for multipurpose versatile body carrier Mega 230.
16

SYSTEM-LEVEL SEISMIC PERFORMANCE OF CONCENTRICALLY BRACED FRAMES WITH REPLACEABLE BRACE MODULES

Mohsenzadeh, Vahid January 2020 (has links)
Concentrically braced frames with replaceable brace modules (RBMs) have the potential of improving the constructability of braced frames, mitigating the structural damage during earthquakes, and minimizing the time of post-earthquake repairs. To fill the gaps between the component-level performance of RBMs and system-level behaviour of SCBFs with RBMs, this thesis focused on the overall system-level seismic performance of SCBFs with RBMs in three steps. Firstly, the effects of beam-column connection fixity on the behaviour of three SCBFs were investigated to determine what level of fixity, if any, is required to ensure adequate collapse capacity of an SCBF. Secondly, the effects of column design parameters on braced frame seismic performance were investigated, where two different brace-to-frame connections were considered: 1) conventional gusset plate connection and 2) the newly proposed connection detail with RBMs. Detailed numerical modelling was undertaken to develop improved provisions for designing columns in SCBFs. Finally, a large-scale experimental program was conducted to evaluate the seismic performance of braced frames with initial and replaced RBMs where realistic boundary conditions were provided. Three different beam-column connections that can be used in SCBFs with RBMs were designed and tested. Based on the current work, the recently proposed concept of replaceable brace modules, accompanied by the recommended methods for designing columns and detailing beam-column connections, appears to be a promising approach. The fabrication and installation are simpler, the seismic performance is similar to that of SCBFs with currently accepted connection detailing, and the approach can increase the post-earthquake reparability of steel concentrically braced frames. / Dissertation / Doctor of Philosophy (PhD)
17

Koncepce pro 5 nápravový přívěs / 4 nápravový návěs s výměnnými nástavbami / Concept for a 5 axle trailer / 4 axle trailer with replaceable bodies

Šeda, Pavel January 2014 (has links)
This thesis describes the design concept five-axle balanced trailer / four-axle semi-mounted trailer with swap bodies. The initial point of this work is the search of possible solutions both. The second part of the justification for selection of the very concept design proposal is selected variants. Another point of this work is the analysis of the strength of the chassis frame. Control is mainly engaged deformation and strain analysis in different Load case. The thesis is also drawing documentation. This thesis was developed in cooperation with ZDT Nové Veselí s.r.o.
18

Využití fotogrammetrie pro realitní praxi / The Use of Photogrammetry in the Real Estate Practice

Viktora, Jakub January 2014 (has links)
This diploma thesis aims to explore possibilities of using IT in real estate and projection practice. It deals with simplification of difficult or insolvable tasks. It focuses on rapidly developing field of photogrammetry and its further processing via software. The work presents methods of measurement of existing realties without using standard methods (tape line, laser). Instead of these tools, the author uses photographic data and program PhotoModeler for surveying and creating a 3D model of the facade. The thesis verifies further serviceability of gained data up to the render phase of the surveyed building facade.

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