Showing papers in "Transactions of the American Society of Civil Engineers in 1947"
TL;DR: The drawdown in an artesian well that is pumped has two components: the first arising from the resistance of the formation, is proportional to the discharge; and the second, termed "well loss" as discussed by the authors.
Abstract: The drawdown in an artesian well that is pumped has two components: The first, arising from the “resistance” of the formation, is proportional to the discharge; and the second, termed “well loss” a...
347 citations
TL;DR: The production of light structural steel shapes from sheet steel, by cold forming and spot welding, necessitates the development of special design methods adapted to the peculiarities of such membe...
Abstract: The production of light structural steel shapes from sheet steel, by cold forming and spot welding, necessitates the development of special design methods adapted to the peculiarities of such membe...
287 citations
TL;DR: In this article, the authors analyze the safety factor in engineering structures in order to establish a rational method of evaluating its magnitude and find that the discrepancy between the highly refined safety factor and the actual safety factor is large.
Abstract: The purpose of this paper is to analyze the safety factor in engineering structures in order to establish a rational method of evaluating its magnitude. The discrepancy between the highly refined p...
195 citations
41 citations
13 citations
11 citations
10 citations
TL;DR: In this paper, the authors investigated the strength of STEEL BEAMS in LATERAL BUCKLING and showed that the critical stress of ROLLED BEAMS can be grouped into a good pattern and that working formulas can be deduced from them.
Abstract: USUAL SPECIFICATIONS FOR THE DESIGN OF BEAMS PROVIDE FOR REDUCING THE ALLOWABLE UNIT STRESS OF THE COMPRESSION FLANGE AS THE UNSUPPORTED SPAN LENGTH INCREASES, TO GUARD AGAINST LATERAL BUCKLING. SUCH PROVISIONS RELATE THIS REDUCTION ONLY TO THE RATIO OF UNSUPPORTED BEAM LENGTH TO FLANGE WIDTH, THUS NEGLECTING THE INFLUENCE OF (1) THE HORIZONTAL MOMENT OF INERTIA OF THE COMPRESSION FLANGE, AND (2) THE RESTRAINT AFFORDED BY THE TENSION FLANGE, WHICH DECREASES AS THE DEPTH OF THE BEAM INCREASES. MATHEMATICAL FORMULAS ARE DEVELOPED BY AN EXTENSION AND EVALUATION OF THE TREATMENT OF THIS PROBLEM GIVEN BY S. TIMOSHENKO. TYPICAL FORMULAS ARE PROPOSED FOR INCLUSION IN SPECIFICATIONS, AND ADDITIONAL FORMULAS FOR SPECIAL INVESTIGATIONS ARE DERIVED AND THEIR APPLICATION DESCRIBED. BY INVESTIGATING THE STRENGTH OF STEEL BEAMS IN LATERAL BUCKLING, IT HAS BEEN SHOWN THAT THE CRITICAL STRESSES OF ROLLED BEAMS CAN BE GROUPED TO FOLLOW A GOOD PATTERN AND THAT WORKING FORMULAS CAN BE DERIVED FROM THEM. FOR ALL COMPUTATIONS IT IS ASSUMED THAT THE BEAMS AT THEIR SUPPORTS ARE HELD IN VERTICAL POSITIONS. BEAMS WITH ECCENTRICALLY APPLIED LOADS ARE TORSIONAL PROBLEMS AND HAVE NOT BEEN INCLUDED. COMMONLY USED BEAM SECTIONS AND PLATE GIRDERS ARE DISCUSSED. CHANNELS, ZEES, ANGLES, AND OTHER UNSYMMETRICAL SECTIONS ARE SELDOM USED AS LONG BEAMS, AND IT IS PROPOSED TO ALLOW THE SAME UNIT STRESS FOR THEM AS FOR SYMMETRICAL SECTIONS. THE DEVIATION OF STRESSES OF THE PROPOSED FORMULAS FROM THOSE OF OTHER BEAM FORMULAS IS NEGLIGIBLE FOR SHORT BEAMS, AND THESE UNSYMMETRICAL SECTIONS DO NOT SEEM TO DESERVE SPECIAL CONSIDERATION.
7 citations
TL;DR: As part of the program of the Hydraulic Research Committee of Hydraulics Division, a Subcommittee on Cavitation in Hydraulic Structures was appointed in the summer of 1942.
Abstract: As part of the program of the Hydraulic Research Committee of the Hydraulics Division, a Subcommittee on Cavitation in Hydraulic Structures was appointed in the summer of 1942. Its first objective ...
6 citations
TL;DR: In this paper, the authors present experimental data on the percolation of water under a dam or weir on a porous foundation, where some of the water will percolate underneath it toward the downstream side.
Abstract: When a dam or weir is constructed on a porous foundation, some of the water will percolate underneath it toward the downstream side. The purpose of this paper is to present experimental data on the...
6 citations
Journal Article•
TL;DR: A determined effort has been underway for a few years to correct these landslides on a priority basis as the need arises and as time is available as discussed by the authors, however, it takes very close cooperation between the district construction or maintenance engineer initiating the request for landslide investigation through proper channels, the soils engineer and the assigned design engineer.
Abstract: GENERAL IN TR O D U CTIO N We have all seen evidence of the effects of landslides in costs, incomvenience and possible safety hazards or danger to the travelling public in our travels throughout Indiana and the United States. A determined effort has been underway for a few years to correct these landslides on a priority basis as the need arises and as time is avail able. Landslide investigations are very time consuming to be properly and thoroughly accomplished. It takes very close cooperation between the district construction or maintenance engineer initiating the request for landslide investigation through proper channels, the soils engineer and the assigned design engineer. Certain information should accom pany any request for landslide investigations as follows:
TL;DR: An introduction to the use of matrix algebra in the development and explanation of various methods of structural analysis is presented in this paper, where the possibilities of making rapid design computations is discussed.
Abstract: An introduction to the use of matrix algebra. in the development and explanation of various methods of structural analysis is presented in this paper. The possibilities of making rapid design calcu...
TL;DR: In this article, two full-length submerged shipways, whose walls consist of cellular cofferdams, are described, and the cells of the cofferedams are filled with marl and founded on marl.
Abstract: Two full-length submerged shipways, whose walls consist of cellular cofferdams, are described in this paper. The cells of the cofferdams are filled with marl and founded on marl. The term “marl” is...
Journal Article•
TL;DR: Based upon surveys of the actual live loads in office buildings and warehouses, and upon a consideration of probable actual live load in apartment buildings and places of assembly, this article proposed a model for estimating live loads.
Abstract: Based upon surveys of the actual live loads in office buildings and warehouses, and upon a consideration of probable actual live loads in apartment buildings and places of assembly, this paper deve...
Journal Article•
Journal Article•