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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 73 for “"Diaphragms"”.
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Horizontal Stiffness of Wood Diaphragms
… was conducted to study the stiffness of wood diaphragms. Currently there is no method to calculate wood diaphragm stiffness that can reliably account for all of the various framing configurations. Diaphragm stiffness is important in the design of wood framed structures to calculate the …
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The deflection of steam turbine diaphragms
Thesis: M.S., Massachusetts Institute of Technology, Department of Mechanical Engineering, 1938
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Analysis of Multicell Box Girders With Diaphragms
Made available in DSpace on 2014-12-08T23:56:51Z (GMT). No. of bitstreams: 1 6711817.pdf: 4745586 bytes, checksum: 307ccdc5bdfc566f806e68de973d2708 (MD5) Previous issue date: 1967
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Dynamic response of URM buildings with flexible diaphragms
As seismic awareness increases, especially in traditionally non-seismic regions, there is an ever-increasing need to evaluate the lateral resistance of existing structures. Unreinforced masonry (URM) structures are perceived to be seismically unsafe due to dramatic media coverage of these …
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Analytical investigation of composite diaphragms strength and behavior
Composite diaphragm strength and behavior were studied using non-linear finite element analysis. A total of 57 three panel diaphragm models were analyzed to failure. Parameters studied included beam size and orientation, panel dimension, connector type and distance, slab opening, yield plateau, and …
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Analytical Modeling of Wood-Frame Shear Walls and Diaphragms
… models of wood-frame shear walls and diaphragms for use in monotonic, quasi-static (cyclic), and dynamic analyses are developed in this thesis. A new analytical model is developed to accurately represent connections between sheathing panels and wood framing members …
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Improved seismic analysis of unreinforced masonry buildings with flexible diaphragms
The presence of flexible timber diaphragms in many existing unreinforced masonry buildings poses a significant challenge for the assessment of their seismic vulnerability. When diaphragms are flexible, different parts of a structure can interact with each other dynamically, in a way not typically …
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Effects of Diaphragms in Continuous Slab and Girder Highway Bridges
Made available in DSpace on 2014-12-10T22:22:00Z (GMT). No. of bitstreams: 1 7317671.pdf: 3743816 bytes, checksum: 3264b26f07a0df68ed001a3d949ba8e9 (MD5) Previous issue date: 1973
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The Seismic Behavior of Steel Structures with Semi-Rigid Diaphragms
… indicate that the in-plane rigidity of the diaphragms affects the efficiency of in-plane force transfer mechanisms, resulting in different global ductility and strength demands. Rigid diaphragm structures exhibit higher global strengths as well as higher torsional rotation capacity because …
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Seismic Response of Low -Rise Shear Wall Structures With Flexible Diaphragms
In this study, simple methods to more accurately estimate peak interstory drifts that account for higher mode effects are described for low-rise perimeter shear wall structures. The proposed methods are based on the principal modes obtained from a principal components analysis (PCA) of computed …
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Effects of Diaphragms in Bridges With Prestressed Concrete I-Section Girders
Made available in DSpace on 2014-12-10T22:21:47Z (GMT). No. of bitstreams: 1 7212382.pdf: 8031992 bytes, checksum: 2f9b7c95e83b7ac2d9190e1dc2c81f29 (MD5) Previous issue date: 1971
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Experimental Program for Fiber Reinforced Polymer Retrofit of Reinforced Concrete Diaphragms
… horizontal loads are trans-mitted from the floor diaphragms to the columns and walls that comprise the vertical lateral force resisting system in a building. Strengthening of the diaphragms in older reinforced concrete buildings may be necessary for several reasons, including to enhance seismic …
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Cyclic Loading Response of Reinforced Concrete Tilt-Up Structures With Plywood Diaphragms
… concrete tilt-up structures with plywood roof diaphragms to lateral forces is controlled primarily by the behavior of the plywood roof diaphragms. The response is controlled secondarily by the connections between longitudinal and transverse wall panels and the loads for cracking of the …
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Analysis and Design of Fiber Reinforced Polymer Retrofit of Reinforced Concrete Diaphragms
… horizontal, vertical, and foundation components. Diaphragms form the horizontal LFRS, transmitting lateral loads from earthquakes and wind events to vertical systems such as moment frames and shear walls. In reinforced concrete (RC) buildings, diaphragms often require retrofit due to …
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Computational and Experimental Study on the Behavior of Diaphragms in Steel Buildings
… or shear walls, and a horizontal LFRS with diaphragms playing a crucial role. There are various types of floor and roof diaphragms in steel buildings, such as concrete-filled steel deck diaphragms for the floor system and bare steel deck diaphragms for the roof system of a typical steel …
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Role of timber diaphragms in the seismic response of unreinforced masonry (URM) buildings
… in this thesis was focused on timber floor diaphragms in unreinforced masonry (URM) buildings. The work was divided into two phases. The first phase was aimed at the investigation of the effects of the in-plane behavior of timber diaphragms on the global seismic response of URM buildings. …
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The formation of advanced composite materials over complex geometric shapes using inflated diaphragms
Thesis (B.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1997.
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Characterizing the Load-Deformation Behavior of Steel Deck Diaphragms using Past Test Data
… historical data has shown that steel deck diaphragms, common to steel framed buildings, perform exceptionally well during earthquake events. A new alternative diaphragm design procedure in ASCE 7-16 increases diaphragm seismic demand to better represent expected demands. The resulting …
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Insulation Impact on Shear Strength of Screw Connections and Shear Strength of Diaphragms
Several thousand tests throughout the world have been conducted on the shear strength of screw connections in cold-formed steel, however, little to no research has been conducted on how various thicknesses of insulation placed between two sheets of steel, such as a steel panel and structural …
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Experimental and Analytical Evaluation of FRP-Retrofitted Reinforced Concrete Diaphragms for In-Plane Shear Strengthening
Diaphragms are a key component of the horizontal lateral force resisting system (hLFRS) in a reinforced concrete (RC) structure and are crucial for providing sufficient load path to the vertical lateral force resisting system (vLFRS). Diaphragms may require retrofit due to the relocation of vLFRS …
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