Four full-size statically indeterminate reinforced concrete frames with two symmetrical bays were tested to obtain sufficient data to evaluate the adequacy of the current ACI-ASCE Committee 352 design recommendations, as well as to determine whether a relaxation of some of the limits in these guidelines can be justified. Each specimen contained three 8.5-foot-long columns, connected at mid-height by two 9-foot-long beams. Initially, a constant axial load was applied to each column. The specimens were then subjected to a displacement-controlled loading schedule to simulate the type of displacements a frame may experience during a severe earthquake. In designing the specimens, the latest recommendations of the ACI-ASCE Committee 352 and the ACI building code ACI 318-83 were satisfied except for the following modifications: (1) the flexural strength ratio (M(R)) in the second specimen was reduced from 1.4 to 1.2, (2) the shear-stress factors (γ) in the joints of the third specimen were increased from 12 and 15 to 15 and 20 for the exterior and interior joints respectively, and (3) the number of the transverse reinforcements inside the right exterior joint in the fourth specimen was reduced from 4 to 2 sets of hoops. The conclusion inferred from the results indicate that for drift levels within the elastic range, the elongations and the rotations of the beam regions near the faces of the columns, in addition to the joint shear strains, were not affected by the design values for the primary variables in the last three specimens. For larger excursions into the inelastic range, the relaxation of the current Committee 352 design recommendations in the last three specimens not only showed a significant effect in reducing the elongations and the rotations of the beams, or in increasing the joint shear strains but led to lower energy dissipation of the specimens. Consequently, the current design guidelines by the ACI-ASCE Committee 352 yield statically indeterminate frames which exhibit sufficient ductility.

This manuscript predicts the behavior of a doubly reinforced concrete beam with a circular opening at its midspan by closely analyzing traditional beam theory and design. It then confirms these predictions with finite element modeling software while providing design suggestions. The analysis is limited to the tensile and compressive stresses and cracking behavior. The objectives are to determine the stress distribution around a circular opening that agrees with conventional beam theory. The beam behavior is examined from zero load to failure load. ANSYS is utilized in lieu of real world testing, and the appendix includes the finite element results for a beam including design recommendations. The results lay the foundation for a possible new design procedure of concrete beams with single or multiple circular openings. This research offers useful information that was unavailable previously. More research can be conducted to help designers to design lighter, more efficient concrete beams. / by Heather R. Anesta. / Thesis (M.S.C.S.)--Florida Atlantic University, 2010. / Includes bibliography. / Electronic reproduction. Boca Raton, Fla., 2010. Mode of access: World Wide Web.

A cyclic polarization procedure was designed to evaluate the pitting potentials of high performance stainless steels in synthetic concrete pore water at different chloride concentrations. Cyclic polarization scans were performed on high performance stainless steel reinforcements, S32201, S32305 and S32205. Pitting initiation was observed below the oxygen evolution potential for high chloride concentrations. S32201 and S32304 showed the presence of metastable pitting before reaching its pitting potential. Pitting resistance performance, based on cyclic polarization, was consistent with each material's respective Pitting Resistance Equivalent Number (PREN) value. For S32201 and S32304, pitting potential decreased as the chloride concentration increased, whereas S32205 did not pit at the chloride concentrations tested. / by Erika Maria Sanchez. / Thesis (M.S.C.S.)--Florida Atlantic University, 2011. / Includes bibliography. / Electronic reproduction. Boca Raton, Fla., 2011. Mode of access: World Wide Web.

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Thesis (M. Arch.)--Massachusetts Institute of Technology, Dept. of Architecture, 1982. / MICROFICHE COPY AVAILABLE IN ARCHIVES AND ROTCH. / Includes bibliographical references. / There are many reasons for undertaking a work such as this. Among them are the benefits offered to society when we acknowledge the potential of submersible structures, The provision of habitable underwater space remains an unexploited resource of great potential. Hopefully, it will be utilized in an ethically intelligent manner. Perhaps, the spiritual qualities of water will foster peace engendering or life sustaining pursuits resulting in paradigms of new urban forms and ideals. Herein, a broad view is offered of inspirations and ideologies leading towards a conceptual basis for sea dwellings. Developed from an ontogenesis into criteria for environmental design, siting, energy options and program ethics, a platform for establishing a sea utilization framework is imparted. The structural design development incorporates fundamental considerations for aqueous habitats. Reinforced concrete for sea use is discussed in depth including expositions on hydraulic cements and construction techniques . A basic sea structure design/analysis method which uses thin shell theory to reliably approximate the behavior of thick shells is presented through both simple and complex examples. The volume concludes with a metamorphosis of sea dwelling concepts in the form of original sketches, technical drawings and tone paintings. This thesis attempts to broaden the scope of knowledge of the architectural designer and planner through an effort to bridge ocean sciences, ocean engineering and architectural concerns. With the knowledge thus gained, it may be possible to project further into civilization's potential for cultural development within the limited context of the sea as a dwelling place. / by Ricardo Guillermo. / M.Arch.

Typescript (photocopy). / Digitized by Kansas Correctional Industries

Thesis (M. Arch.)--Massachusetts Institute of Technology, Dept. of Architecture, 1963. / MIT Institute Arcives copy has the appropriate accompanying leaves of plates after each title; MIT Rotch Library copy has them all lumped-together at the end. / Three individual titles bound together with a collective title and an introduction. Compiled, with an introduction, by Prof. Eduardo F. Catalano. / Preface: By presenting the three individual theses with a common analysis of material pertinent to the design of each thesis it is hoped that a more rich and extensive result has been attained. / Brunken, Alan Wayne. A multistory precast concrete office building (1963) -- Henney, Thomas. A precast concrete high-rise office building (1963) -- Westbury, Rodney Ames. A multi-story precast concrete office building (1963). / M.Arch.

Thesis. 1977. M.Arch.A.S.--Massachusetts Institute of Technology. Dept. of Architecture. / MICROFICHE COPY AVAILABLE IN ARCHIVES AND ROTCH. / Bibliography : p. 103. / by Loren Ahles. / M.Arch.A.S.

Thesis. 1975. M.S.--Massachusetts Institute of Technology. Dept. of Civil Engineering. / Bibliography: leaves 70-72. / M.S.

Thesis. 1978. M.Arch.A.S.--Massachusetts Institute of Technology. Dept. of Architecture. / MICROFICHE COPY AVAILABLE IN ARCHIVES AND ROTCH. / by George Szepesi. / M.Arch.A.S.