Tangent Stiffness in Plane Frames
With reference to planar framed structures, a tangent stiffness matrix is derived that does not require any approximation beyond those used in the conventional beam-column theory. The...

Lateral Stability of Wood Beam-and-Deck Systems
Modern timber structures frequently employ large wood beams bridged by 2 in. wood decking. Economy of material dictates the use of deep narrow beams whose design is limited by considerations...

Three-Dimensional Interaction of Walls and Frames
The three-dimensional interaction of several plane walls, open section walls, and plane frames is studied under the action of horizontal forces. Walls are taken to have infinite shear...

Short Term Deflection of Concrete Flat Plates
Short term deflections of concrete flat plates are considered. Deflection results from a number of finite element analyses of flat plates are examined and used to provide empirical formulas...

Effect of Major Axis Curvature on I-Beam Stability
In the flexural-torsional buckling of beams, it is common practice to assume that the major axis flexural rigidity, EIx,...

Impulsive Hydrodynamics of Submerged Rigid Bodies
A theoretical approach to the calculation of hydrodynamic loads is outlined herein and numerical results are presented for several submerged configurations. Computations were carried out...

High Order Rectangular Shallow Shell Finite Element
The stiffness matrix for a high order shallow shell finite element is presented explicitly. The element is of rectangular plan and possesses three constant radii of curvature: two principal...

Unbraced Multistory Steel Frames with Wind Load
An approximate method is developed for the rapid plastic analysis of multistory steel rigid frames subject to sidesway under combined gravity and wind loading. Equilibrium is formulated...

Frequency Analysis of Tapered Orthotropic Plates
A systematic method based on the relatively well-known enclosure or comparison theorem of Callatz is used to obtain the upper and lower bounds for the fundamental frequency of simply supported...

Boussinesq Problems for Nonhomogeneous Solid
An integral transform solution is reported to determine the state of stress and deformation in a semi-infinite solid whose modulus of rigidity increases with its depth according to a power...

Present design procedures (1971) for steel columns imply that each column in a story is capable of resisting a lateral force including that produced by the axial force as the structure...

Performance of Pile Driving Hammers
Using results from both theory and measurements the action and behavior of hammer-pile systems are considered. Three types of models are used to describe the behavior of a hammer-pile...

Experimental Investigation of Thin-Steel Hyperbolic Paraboloid Structures
Extensive tests on inverted umbrella and saddle-shaped models indicate that the design of thin-steel hypar roofs is usually governed by stiffness, rather than by stress limitations. The...

Large Deflection Buckling of Space Frames
Buckling loads of space rigid frames based on large deflection theory were determined herein by a method referred to as the constant load method. In this method, the load is maintained...

Efficient Reanalysis of Modified Structures
Techniques are examined for the analysis of structures in which the dimensions of some or all members may be changed. Several existing methods which do not require complete reanalysis...

Flexural Rigidity of Concrete Column Sections
The examination of theoretical stiffness ratios for reinforced concrete sections under uniaxial bending and axial load has shown that a reasonably simple set of approximate equations can...

Behavior of Laterally Reinforced Concrete Columns
The results of an experimental and analytical investigation of the effect of non-uniform lateral confinement, such as that produced by closely spaced rectangular ties, on the behavior...

Finite Element Analysis of Reinforced Concrete Slabs
The bending analysis of reinforced concrete slabs by the finite element method is presented. The analysis concentrates on the nonlinear behavior due to progressive cracking of a slab and...

Design Criteria for Turbine-Generator Pedestals
American design practices and criteria for large turbine generator pedestals is reviewed. Parametric studies show that, irrespective of its rigidity, the mat should be included as part...

Reticulated Space Structures
Recent developments in the application of reticulated or shell-type construction are presented. Five general methods of analysis are given: (1) the stiffness approach; (2) continuum shell...