Abstract: The motion of a plane rigid body that rests unrestrained on a rigid foundation that is accelerating is described by five modes of response: rest, slide, rock, slide-rock, and free flight. Determining the correct initial ...

Abstract: The analysis of a crosstie railroad track in the lateral plane has traditionally been based on the theory of a beam on an elastic foundation, in which the bending rigidity of the track structure is assumed to be twice the ...

Abstract: A technique based on Horowitz’s nonlinear quantitative feedback theory is presented, in which the size of the uncertainty is reduced by cancellation of the plant nonlinearity through nonlinear ...

Abstract: Many oscillating systems in practice are subject to periodic, impulsive loads during their motion. For nonlinear systems traditional methods, such as the slowly varying parameter technique, have ...

Abstract: Static and dynamic tests were conducted on wood frame shear walls to (1) determine the wall resistance to lateral loading; (2) examine the wall performance under fully reversed cycles of dynamic loading; and (3) compare ...

Abstract: The effect of measurement error on the results of a new method for damage identification in large, massive civil structures is presented. The damage identification procedure is based on the redistribution of dead load in ...

Abstract: A new method for damage identification in large, massive civil structures is presented, which is based on the idea that dead load is redistributed when damage occurs in the structure. The method uses static strain measurements ...

Abstract: Thom's estimators for the two-parameter gamma distribution arise as asymtotic approximations to the maximum likelihood estimators. Being perhaps the simplest estimators known in this case, their properties are here ...

Abstract: Results of a study are presented in which the performance of code‐designed fixed‐base and base‐isolated concrete frames are compared. The purpose of the investigation is to compare in a quantitative manner the relative ...

Abstract: While personal‐computer‐based data‐acquisition systems have become commonplace in the laboratory environment over the past several years, their use as remote, automatically triggered data‐collection systems has been somewhat ...