3-Dimensional Contribution to Frame-Wall Lateral Behavior

Behavior of the first floor of the U.S.-Japan seven story reinforced concrete test structure was modeled by a finite element model. The constitutive matrix describing material behavior is a normal concrete model which included a smeared cracking capability. The computed response of the system was shown to have a dependence on the level of tension stiffening present in the concrete. The selection too Iowa value distorted the behavior observed in the model. The 3-dimensional effects presented in the test structure was also observed in the computational model. Motion of the tension I column was transmitted through the slab and beams to the outer frames. This mechanism . provided a significant contribution to the lateral load resistance.National Science Foundation Research Grant CEE 83-1204

Material Behavior Characteristics for Reinforced Concrete Shells Stressed Beyond the Elastic Range

The National Science Foundation; Grant No.GK 1119

Finite Element Approach For The Prediction Of Inelastic Behavior Of Shear Wall-Frame Systems

The National Science Foundation; Grant No.GK 1119

Use of Non-Conforming Modes in Finite Element Analysis of Plates and Shells

Office of Naval Research. Department of the Navy.Contract N00014-67-A-0305-001

Lumped-Parameter Analysis For Shear Failure In The End Slab Of Cylindrical Prestressed Concrete Pressure Vessels

A Report on an Investigation carried out as part of the Prestressed Concrete Reactor Vessel Program of the Oak Ridge National Laboratory. Operated by Union Carbide Corporation for the U.S. Atomic Energy Commission.Issued as the author's Ph.D thesis.Prostressed Concrete Reactor Vessel Program ; Contract No. W-7405-eng-26, Sucontract No. 290

Analysis of Reinforced Concrete Frame-Wall Structures for Strong Motion Earthquakes

The nonlinear response and failure mechanism of reinforced concrete frame-wall systems are investigated through mechanical models for both dynamic loads and static loads. Three mechanical models: a concentrated spring model, a multiple spring model, and a layered model, which take into account inelastic behavior of a reinforced concrete cantilever beam, are presented. Ten story reinforced concrete frame-wall structures are investigated. The stiffness characteristics of each constituent member are determined through one of the mechanical models by its inelastic properties or by a hysteresis model. The procedure of a load increment analysis is used for a static loading case. The equations of· motion are solved by a step by step integration procedure for a dynamic loading case. Computed results are compared with experimental results.National Science Foundation Research Grant ENV74-2296

Nonlinear Behavior of Reinforced Concrete Cooling Towers

National Building Research Institute of the Council for Scientific and Industrial Researc

Finite Element Analysis of Translational Shells

The Office of Naval Research Department of The Navy; Contract N 0014-67-A-0305-001

Computed Nonlinear Seismic Response of R/C Wall-Frame Structures

National Science Foundation Research Grant CEE 83-1204

Finite Element Analysis of Skewed Shallow Shells

Shallow doubly curved translational shells are efficient and aesthetically attractive structures and as such are being used with increasing frequency in roof construction. Due to the realization that the membrane or momentless" theory is not always applicable, especially in the case of hyperbolic paraboloids bounded by characteristics, the bending theory of this type of shell has received a great deal of attention in recent years (28, 46, 39, 4, 9, 17).The Office of Naval Research Department Of The Navy. Contract N 00014-67-A-0305-001