Terry F. Doolan

Bio: Terry F. Doolan is an academic researcher. The author has contributed to research in topics: Reinforced solid & Structural material. The author has an hindex of 1, co-authored 1 publications receiving 29 citations.

Nonlinear Stress Analysis of Reinforced Concrete

Abstract: A finite-element analysis of reinforced concrete structures is presented. The solution is based on a two-dimensional analysis. The analysis includes the elastoplastic behavior of steel and concrete and the limiting tension criterion for concrete. The nonlinear problem is solved as piecewise linear one and introduced the effect of nonlinearities in material behavior by means of a stress transfer process. The results of the numerical examples are compared with the available solutions. It is emphasized that such a nonlinear analysis is necessary for a realistic stress distribution in reinforced concrete structures due to the redistribution of stresses resulting from the progressive cracking of concrete.

Advances in strength theories for materials under complex stress state in the 20th Century

Abstract: It is 100 years since the well-know Mohr-Coulomb strength theory was established in 1900. A considerable amount of theoretical and experimental research on strength theory of materials under complex stress state was done in the 20th Century. This review article presents a survey of the advances in strength theory (yield criteria, failure criterion, etc) of materials (including matellic materials, rock, soil, concrete, ice, iron, polymers, energetic material, etc) under complex stress, discusses the relationship among various criteria, and gives a method of choosing a reasonable failure criterion for applications in research and engineering. Three series of strength theories, the unified yield criterion, the unified strength theory, and others are summarized. This review article contains 1163 references regarding the strength theories. This review also includes a biref discussion of the computational implementation of the strength theories and multi-axial fatigue.

Endochronic theory of inelasticity and failure of concrete

Abstract: A gradual accumulation of inelastic strain can be most conveniently described in terms of the so-called intrinsic time, whose increment depends on the time increment as well as the strain increments, and was previously developed for metals and is extended herein to concrete. It is demonstrated that the proposed model predicts quite closely: (1)Stress-strain diagrams for concretes of different strength; (2)uniaxial, biaxial, and triaxial stress-strain diagrams and failure envelopes; (3)failure envelopes for combined torsion and compression; (4)lateral strains and volume expansion in uniaxial and biaxial tests; (5)the behavior of spirally confined concrete; (6) hysteresis loops for repeated high compression; (7)cyclic creep up to 10 6 cycles; (8)the strain rate effect; (9)the decrease of long time strength; and (10)the increase of short-time strength due to low stress creep.