Simplified Analysis of Framed-Tube Structures
A simplified method is presented for the analysis of framed-tube structures subjected to lateral loads. The rigidly jointed perimeter frame panels are replaced by equivalent orthotropic...

The CSM Cell — a Borehole Device for Determining the Modulus of Rigidity of Rock

Buckling of Slanted Columns
A slanted column may represent an inclined member of a truss, a frame, or a meridional element of an axisymmetrically deformable conical shell with rigid edges. Such a structure has a...

Displacements and Stresses in Nonhomogeneous Solid
An analysis is described for determining the displacements and stresses in an isotropic nonhomogeneous elastic solid whose modulus of rigidity varies with the depth. The solid, which is...

Stress Distributions Around Shallow Buried Rigid Pipes
Normal and tangential loads on shallow buried rigid pipes due to superimposed surface loads are calculated by the finite element method. The effects of the variations in the length of...

Stiffness Center Method
A approximate analysis of rigid frames using a new concept, called the stiffness center, is presented. It has been shown that when a skeletal elastic system is idealized as a configuration...

Differential Settlement of Buildings
Published case histories of differential settlement reveal a relation between the maximum measured differential settlement and damage to buildings. This relation, first proposed by Skempton...

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...

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...

 

 

 

 

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