Chaotic Response and Stability of Rocking Rigid Objects
An analytical method and numerical results for predicting the existence of chaotic response of rocking rigid objects subjected to harmonic horizontal based excitation are presented. It...
Sensitivity Analysis of Connection Stiffness in Orthogonal Frames with End-Plate Connections
According to AISC-LRFD specification (1986), two types of construction for steel frame structure can be assumed which are Type PR (partially restrained) and FR (fully restrained) constructions....
Buckling of Frames with Load-Dependent Supports
The supports of frames may increase their rotational resistance as they are compressed. It is assumed here that this stiffening is a linear function of the load. Sway and nonsway buckling...
Stability Analysis of Nonlinear Frames
The second stiffness method for large deformation in-elastic stability analysis of frames is discussed. Displacement control methods for tracing the path beyond the limit point are presented....
Ultimate Loads of Steel Frames with Imperfections
As for real structures, initial geometric imperfections are inevitable and may have a destabilizing effect on the structures. The present research deals with the study of this imperfections...
Up and Down Construction of a 17-Story Building
The One Westwood Building is located on a small site in the Westwood district of Los Angeles. Construction of the 17-story building with 8 levels of subterranean parking was complicated...
CADD for Export
By using sophisticated structural design software and high-speed PCs, engineers in Pittsburgh overcame myriad problems when designing a highrise industrial tower in India. First, they...
Performance of a Prestressed Rigid Frame During Removal of Column 6W from I93 in Boston, Massachusetts
The first phase of the suppression of Boston's Central Artery included the Early Viaduct Construction in the Central Artery North Area. This project required that Column 6W...
Design and Planning of Structural Steel Roll-In
Innovative construction methods were required to erect structural steel inside a 170 foot long box truss over a railroad. The contractor engineered and executed a unique system to roll...
Ductile Frames Are Tough for Earthquakes
Implications of a new structural system in wharf design go far beyond San Francisco Bay, where two such wharves remained intact after the 1989 Loma Prieta quake. The design, introduced...
Seismic Surgery Rewarded
By installing isolators in the columns and strengthening the frame, engineers upgraded an eight-story concrete office building in Seal Beach, Calif. so that it should continue to function...
Influence of Rigidity of Soil Surrounding Shield Tunnel Upon Equivalent Rigidity of the Tunnel in Axial Direction
The purpose of this study is to investigate the interaction between ground surrounding a shield-driven tunnel and segments, especially their ring-joint portion. When a seismic force acts...
Safety Analysis of Steel Building Frames Under Dynamic Wind Loading
A method is presented for evaluating the lifetime risk of failure, in terms of probability of excessive inter-floor deflection, for a class of steel building frames subjected to dynamic...
Automated Damage-Controlled Design of RC Buildings
This paper presents an automated damage-controlled design method, which aims for uniform damage distribution throughout the entire building frame while respecting the strong-column weak-beam...
Load Path Dependence of Structural Systems
This paper presents the results of an investigation into the sensitivity of the behavior of framed structures to load path. Simple but realistic structural steel frames have been designed...
Random Instability of Elastic-Plastic Frames
A concept of joint probability of elastic and plastic instability modes was formerly given for single columns and now it is extended for framed systems. A critical load is defined for...
Probabilistic Evaluation of Load Factors for Steel Rigid-Frame Piers on Urban Expressway Network
A procedure is proposed for calculating the optimal load factors for steel rigid-frame piers using the extended level 2 reliability method. Twelve typical types of pier structures are...
Ultimate Limit State Design for Earthquake Resistant Steel Frames
This paper describes a basic methodology to assess the reliability of steel framed structures subjected to ultimate earthquakes. After a discussion on past damage criteria, a modified...
Code-Implied Structural Safety for Earthquake Loading
A method is described for calculating the probability of failure of reinforced concrete frame structures due to earthquake loading, for use in code calibration exercises. The failure criterion...
Mode Truncation Effects on Flexible Space Structures
This paper deals with the problem of active vibration control of flexible space structures. The main difficulty associated with this problem is that the structure has infinite vibration...
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