Damping in Tall Buildings: Its Variability and Treatment in Design
Increasingly, damping is being recognized as an important factor in the design of structures. It is at the same time a property which is relatively poorly defined, more acquired than engineered...
Damping Systems to Limit the Motion of Tall Buildings
Two types of damping systems have been used successfully in building applications - the Tuned Mass Damper, and Viscoelastic Damping Units. In the past, Tuned Mass Dampers were used in...
Design of Viscoelastic Dampers for Columbia Center Building
To reduce the dynamic response of a building with a given height and plan area to wind load, aside from inherent damping of the building, the designer has a few options available to him/her....
Performance of Viscoelastic Structural Dampers for the Columbia Center Building
Vibratory motion of structures such as buildings, bridges, and floors can be reduced by the use of viscoelastic (V. E. ) dampers. Such dampers transfer part of the vibratory energy of...
The Public/Private Condo
A 20-story office building in Chicago was built on publicly owned land under a condominium arrangement that allowed a developer full ownership of air rights over and above the 100,000...
Complex Tower Meets Quake Code
A Los Angeles building consists of a triangular 23-story office tower stacked on top of an 11-story rectangular parking garage. The dual-shape is unique in seismically active southern...
Computer Cuts Tower Steel
Two computer programs developed by Lev Zetlin Assoc., New York City, revealed that some of the steel in what will be Philadelphia's tallest building, One Liberty Place, was...
Roof Membranes: New Systems, New Problems
Market trends in roof membranes are described; most important is the use of single-ply membranes of rubber or plastic in the past decade. A swing to modified bitumen membranes is predicted...
The Empty Berth: Problems in Developing Countries
The ports in developing countries have grown by leaps and bounds. Different causes (of market, technical, economic, financial or political) were the origin of that irregular growth, derived...
U.S. Navy's First Double Deck Pier
The present single level concept of pier construction limits the pier-side service to the fleet. With the ever increasing requirements for utilities to the ships, and maintenance and training...
Systematic Design of Marinas for Ice Condtions
A systematic approach and recommendations are presented for design engineers use in planning and building safe docks and marinas, and in reducing the expense of damages which ice causes....
Expansion of the Electro-Coal Transfer Terminal
This paper briefly describes renovation and expansion of the coal and phosphate marine terminal in Davant, La. The program included: replacement of existing berths damaged by marine accident;...
Improving Maintenance Performance
This discussion concerns Maintenance Management concepts that emphasize how the human element among Port personnel can be organized and efforts channeled so as to: increase the actual...
Modern Inspection Techniques n Port Maintenance
This paper addresses inspection of underwater structure of port facilities to acquire information which, when subjected to engineering analysis and confirmation, allows planning of short...
Innovative Repairs to Steel Sheet Pile Structures
Several unique and many unusual repair techniques have been used to structurally rebuild steel sheet pile walls. An example of a unique repair to a cellular cofferdam utilizing a suspended...
Report of Task Committee on Drydock Design Criteria
This paper briefly summarizes the work carried out by a Task Committee on Drydock Design Criteria which was established by the Committee on Ports and Harbors. The Committee was established...
Louisiana Avenue Wharf E: Rehabilitate the Existing Wharf into a Container Terminal
The Port of New Orleans is currently modernizing the existing facilities in order to handle the containerized cargos, therefore enabling it to compete with other ports located on the Gulf...
Building Motion in Wind
The trend towards higher structural efficiency and hence lower cost has resulted in a generation of lighter and more flexible buildings with a lower inherent capacity for energy dissipation...
Computer Pricing Practices
Civil engineers have become increasingly involved with the use of computers to help solve engineering problems. Many problems that previously could be solved only approximately, or that...
The Mile High Dream
For the 1986 Tall Buildings Conference in Chicago, a group of experts studied the implications of a mile high skyscraper to be built of concrete. It is 500 ft square at the base, designed...
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