Global ETD Search
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 64 for “"long span"”.
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Long-span bridge live loads.
Thesis: M.S., Massachusetts Institute of Technology, Department of Civil Engineering, 1973
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Wind effect on long span bridge
… has studied different types of reactions of long span bridge under wind load, such as vortex shedding, flutter and buffeting. Since all of these conditions have the chance to damage bridge structure, we calculate the particular wind speed and magnitude that will maximize the reaction. To …
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Evaluation of long span composite joists
The strength and stiffness characteristics of longspan composite open-web steel joists are studied. Eight full scale single span composite joists were tested to failure to evaluate their performance in both the elastic and inelastic ranges. The test specimens' spans, depths, slab depth, and amount …
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Vibration Serviceability of Long Span Slender Floors
The modern trend towards long slender floors has led to major vibration serviceability issues in building floors under rhythmic loading. This happens as a result of reduced natural frequencies and damping ratios due to reduced structural rigidity (Devin et al, 2015). Even though these vibrations do …
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Motion control of long span horizontal structures
… bridges, increasing lengths of column-free span and demands for material efficiency have led to an overall reduction in the structural properties of mass, stiffness and damping. These three properties traditionally controlled motion-related serviceability issues, but this is no longer the …
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Recent technology developments for long-span bridges
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 1997.
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Structural Robustness of Long-span Cable-Supported Bridges
… part of the current infrastructure system, long-span bridges are directly exposed to adverse environments, such as floods, scours, hurricanes, etc., and dynamic loads such as earthquakes and vehicular impacts. Additionally, recent long-span cable-supported collapse examples show that many …
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Modeling Vortex -Induced Vibration of Long -Span Bridges
… structures through modal analysis. Additionally, spanwise loss of correlation of the aeroelastic coefficients was incorporated in the model. Long-term, full-scale data measured on the Fred Hartman Bridge (a cable-stayed bridge) were analyzed to detect incidents of vortex-induced response using …
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Spider web geometry inspires long span roof trusses
… geometries and implement them into a practical long span roof truss structure. Specifically, utilizing data and properties of spider webs found in research from Su et al. (Su I. a., 2016). The research uses and implements spider's web design blueprints in present day structural systems. …
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Design of long span modular bridges for traffic detours
… analysis of Acrow bridges showed that maximum span lengths range in the order of 100m; this is fairly short compared to spans of many bridges that will be have to soon be replaced. The current bridge system with which modularity is achieved is a set of truss panels which are supported by …
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Carbon nanotubes and their application to very long span bridges
Spanning long distances in bridge construction relies mainly on the structure's efficiency and materials used. Whereas structural design for high rise building is fast-expanding, the overall design of long span bridges has not progressed significantly, and the increase in span chiefly depends of …
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Behaviour of long span composite beams with precast hollow-core slabs
… the effective width. By varying the beam size, span of beam, shear connection and slab depth in five full-scale experiments, the behaviour of the composite beam will be established.
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Development and Behaviour of a New Long-Span Composite Floor System
This thesis describes the concept behind a new long-span composite floor system and the experimental and numerical verification of that concept. Externally, the floor looks like a nine-metre-long double-Tee floor with hanger systems at its supports, but with unusually thin ribs. Internally, a new …
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A New Analytical Approach to Flutter Analysis in Long-span Suspension Bridges
L'abstract è presente nell'allegato / the abstract is in the attachment
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Experimental and Analytical Study of Vibrations in Long Span Deck Floor Systems
… conducted to address the vibration properties of Long Span Deck Floor Systems (LSDFS). The research comprised three stages. In the first part, experimental in-situ tests were conducted on thirteen bays of buildings under construction. The natural frequencies and acceleration responses were …
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Elastic-plastic finite element modeling of long span composite joists with incomplete interaction
… elastic-plastic finite element analyses of seven long span composite open-web steel joists. These analyses account for the incomplete interaction between the concrete slab and the steel joist by modeling the nonlinear behavior of the steel shear connectors. Experimental tests on long span …
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Serviceability Design of Long-Span Timber Beams Considering Semi-Rigid Beam-Column Connections
… adoption of engineered timber systems in long-span construction has intensified the need for accurate prediction and control of mid-span deflections at the serviceability limit state (SLS). Conventional timber design practice typically assumes idealised pinned supports in deflection …
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