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 32 for “"Cyclic load"”.
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Cyclic load resistance of reinforced concrete beams retrofitted with composite laminates
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1998.
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Behavior of Deep Reinforced Concrete Beams under Monotonic and Reversed Cyclic Load
… find extensive application in cases where heavy loads need to be transferred over a given span. The safety of this kind of structural elements is often critical for the safety of the structure as a whole. The research described in this thesis is devoted to studying the behaviour of …
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Self compacting concrete containing polypropylene fibre and its behaviour as wall panel under cyclic load
… panel, PSCC, with added PPF subjected to lateral cyclic load. The PSCC panel with dimensions of 2000 mm height, 1000 mm width, and 150 mm thick was tested under lateral cyclic load to study its structural behaviour according to code ACI 318 and ASCE/SEI. A parametric study was conducted on PSCC …
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Piezoresistivity Characterization of Polymer Bonded Energetic Nanocomposites under Cyclic Load Cases for Structural Health Monitoring Applications
… and microscopic strain regimes of mechanical loading for each material system, as well as under ten cycles of applied compressive loading within those same strain regimes. Gauge factors were calculated to quantify the magnitude of strain and damage sensing in MWCNT-enhanced material systems. …
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Strengthening of reinforced masonry walls subjected to out-of-plane pseudo-static cyclic load using advanced composite
… and subjected to out-of-plane pseudo-static cyclic load. Experimental and analytical studies were conducted to evaluate the performance of different techniques such as near surface mounted (NSM) and externally bonded (EB) fiber reinforced polymer (FRP) with epoxy resin, in addition to NSM …
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Acoustic Emission Techniques and Cyclic Load Testing for Integrity Evaluation of Self-Compacting Normal and Self-Compacting Lightweight Prestressed Concrete Girders
… on the performance and validation of the 24h load test method (24h LT), the cyclic load test method (CLT), and acoustic emission (AE) techniques when used on self-compacting prestressed lightweight and normal weight concrete girders. The current investigation examines data obtained from the …
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An experimental investigation of cyclically, axially loaded piles in sand
The research work involved the installation and cyclic load testing of large-scale pressure-grouted, instrumented piles in sand in the laboratory. The major objective of this experimental investigation was to establish the effects of the mean cyclic load level and amplitude on the pile behaviour …
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Seismic Damage Analysis and Design of Unreinforced Masonry Buildings
… effects of excessive deformation and repeated loadings. Model parameters for unreinforced brick masonry were obtained from cyclic load tests of masonry wall specimens. A random vibration method using a nonlinear hysteretic restoring force model to describe the load-deformation behavior of …
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Nonlinear Finite Element Analysis of FRP Strengthened RC Beams under Static and Cyclic Loads
… of FRP strengthened RC beams under static load. Very few finite element models for analysis of FRP-RC beam have been developed under cyclic load, and also the degradation of material properties of concrete, steel and FRP with number of cycles have been neglected in the existing few models. …
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Cyclic behaviour of monopile foundations for offshore wind turbines in clay
… strain and stiffness changes resulting from cyclic loading. Considering these issues, research was carried out to improve the current design of monopiles in clay by carrying out displacement controlled monotonic and load controlled cyclic load tests in a centrifuge. Results from monotonic …
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Development of methodologies for the assessment of oral prostheses.
… the performance of these systems to applied loading in direct shear, torsion and bending which to date has not been incorporated in testing; investigate the use of real posts, cores and cements in an environment more representative of that experienced in the mouth; accommodate multiple tests …
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Neural Network Fatigue Life Prediction in Notched Aluminum Specimens from Acoustic Emission Data
… aluminum notched bars under uniaxial tensile loading using acoustic emission (AE) data. The experiments performed in this study extend the results obtained by previous researchers who used maximum cyclic loads of 4,000, 3,000, and 2,000 pounds at a stress ratio of R = 0.0 and a frequency of 1 …
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Modeling Fatigue Behavior of 3D Printed Titanium Alloys
Repeated loading and unloading cycles lead to the formation of strain in the material which causes initiation of the crack formation this phenomenon is called fatigue. Fatigue properties are critical for structures subject to cyclic load; hence fatigue analysis is used to predict the life of the …
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The effect of loading frequency and loading level on the fatigue behavior of angle-ply carbon/PEEK thermoplastic composites
The effect of loading frequency and loading level on the fatigue behavior of ($\rm{\pm}45\rbrack\sb{4s}$ carbon/PEEK composite was investigated. Tention-tention load controlled fatigue tests were performed on straight sided samples using a 100-KN MTS machine. Three loading frequencies (1Hz, 5Hz, …
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Refinement of the Inverted T-Beam Bridge System for Virginia
… and gave adequate performance under monotonic loading. The study recommended cyclic load testing be carried out on this joint type, as well as a welded joint similar to those found in decked bulb-T systems. The research contained herein presents the setup and results of this testing. From the …
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Experimental and analytical investigation of the LRFD strength of tapered members
… were tested to failure under three types of loading that approximated the gravity, lateral, and cyclic load cases. The analytical portion of this study investigated the LRFD strength of the eight tapered knee specimens. The calculated LRFD strengths were compared to the experimentally …
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A study of the deflection and strength of partially prestressed concrete beams with unbonded tendons
… were tested under short-term and sustained loading and a combination of sustained loading with intermittent short-term cyclic loading(combined loading). Two additional ordinary reinforced concrete beams were tested under combined loading for comparison purposes. Results indicated that a …
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Peridynamic analysis of fatigue crack growth in fillet welded joints
… methods to predict the crack propagation under cyclic loadings have some difficulties in treating complicated patterns of crack growth. A peridynamic theory, however, has powerful advantage on discontinuities. A peridynamic fatigue model, which is a bond damage model of remaining life, is used …
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Cyclic Loading Effects on Craniofacial Strain and Sutural Growth in Pigs
… skull is also lacking. Purpose: 1. To develop a loading system capable of reliably delivering cyclic loads to the nasofrontal suture (NFS), 2. To explore strain transmission resulting from cyclic loading of the NFS both ex vivo and in vivo and 3. To characterize the effects of cyclic loading on …
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The fatigue performance assessment of corrosion damaged RC beams, patch repaired and externally strengthened using CFRP
… CFRP strengthened, were subjected to a monotonic load in order to establish the ultimate static load at failure for the RC beams. The ultimate static load at failure was then used to derive the maximum imposed cyclic fatigue loading that was applied. The remaining four RC beams were then subjected …
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