# 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,*EI ,...

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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...*

Aspects of Column Design in Tall Steel Buildings

*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...*

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