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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.
71

Nonlinear finite element analysis of reinforced concrete beams

Yao, Zhong, 姚钟 January 2013 (has links)
A nonlinear finite element program to simulate the behavior of reinforced concrete (RC) members under the action of monotonic increasing loading has been developed. The nonlinear response of the RC members is mainly due to the nonlinear material characteristics including nonlinear biaxial stress-strain relations and cracking of concrete and yielding of steel reinforcement. A constitutive model of concrete under biaxial stress state is adopted in this thesis. In this model, concrete fails and critical cracks occur when the tensile strain of concrete exceeds the limiting tensile strain. The complete stress-strain relationship of concrete under compression and tension are employed in the study to investigate the post-peak behavior of reinforced concrete members. An elaborate cracking model has been implemented which allows concrete to crack in one or two directions. The tension stiffening effect of cracked concrete is also incorporated into this model by including a descending branch in the stress-strain curve of concrete under tension. Other nonlinear effects such as crushing of concrete in compression and yielding or strain hardening of steel reinforcement are also taken into account. A nonlinear finite element program was developed, in which the abovementioned nonlinear effects have all been included in modeling the reinforced concrete structures. The nonlinear equations of equilibrium are solved using an incremental-iterative technique performed under displacement control. The validity of the model including the confinement effect of secondary reinforcements has been examined by analyzing three reinforced concrete beams. The performance of the numerical model was assessed by comparing results with those from available experimental data. / published_or_final_version / Civil Engineering / Master / Master of Philosophy
72

Cracking and deformation characteristics of concrete beams with prestressed concrete reinforcement

Abeyruwan, Helarisi. January 1984 (has links)
published_or_final_version / Civil Engineering / Master / Master of Philosophy
73

Energy absorption of model beams under impact loads.

Watson, Alan James. January 1967 (has links)
No description available.
74

A study of over-reinforced concrete continuous beams subjected to uniform loads /

Bapat, Chandrashekhar Narayan. January 1982 (has links)
No description available.
75

Moment-resistant connections in precast concrete - II.

Shaikh, Mohammad Fazil. January 1969 (has links)
No description available.
76

Shear friction behavior of high-strength concrete

Mitchell, Andrew Douglass 12 1900 (has links)
No description available.
77

Reinforced concrete deep beams : behaviour, analysis and design

Tang, Chi Wai John January 1987 (has links)
The work described in this thesis is concerned with the behaviour, analysis and design of reinforced concrete beams. A brief historical review of the methods of analysis on deep beams is given. The current major codes of practice and design manuals associated with reinforced concrete deep beams are reviewed. This study has been useful in identifying the limitations of the current design documents on the subject of deep beams. Because of the acute shortage of information regarding buckling, web-opening and combined loading, three test programmes are performed to provide experimental evidence on these topics. Their behaviour is examined in terms crack developments, crack patterns, modes of failure, in-plane and lateral displacements, ultimate loads, strains and stresses. The ultimate buckling strength of the slender deep beams without web-openings are analysed using the methods described in the CIRIA Guide (1977). Adopting the same methods in the guide, an attempt has been made to analyse the buckling strength of deep beams with web-openings. Based on the structural idealization of Kong et al (1973), a modified approach is proposed for the ultimate shear strength of deep beams with web-openings. In addition, the CIRIA ultimate shear interaction equation for deep beams under combined top and bottom loadings is studied and an equation is proposed for the uniformly distributed loading cases. Finally, based upon these findings, some design recommendations are given.
78

Steel fibre reinforced concrete coupling beams /

Baczkowski, Bartlomiej Jan. January 2007 (has links)
Thesis (Ph.D.)--Hong Kong University of Science and Technology, 2007. / Includes bibliographical references (leaves 288-293). Also available in electronic version.
79

Evaluation of the maturity method to estimate concrete strength in field applications

Nixon, Jeffrey McMillan, Schindler, Anton K. January 2006 (has links) (PDF)
Thesis(M.S.)--Auburn University, 2006. / Abstract. Vita. Includes bibliographic references (p.429-437).
80

Evaluation of self-consolidating concrete for use in prestressed girder applications

Roberts, James Benson, Schindler, Anton K. January 2005 (has links) (PDF)
Thesis(M.S.)--Auburn University, 2005. / Abstract. Vita. Includes bibliographic references (p.195-207).

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