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Load And Resistance Factor Design Of Cold-Formed Steel Reliability Based Criteria For Cold-Formed Steel Members, Ling-En Hsiao, Wei-Wen Yu, Theodore V. Galambos
Load And Resistance Factor Design Of Cold-Formed Steel Reliability Based Criteria For Cold-Formed Steel Members, Ling-En Hsiao, Wei-Wen Yu, Theodore V. Galambos
CCFSS Library (1939 - present)
In the design of steel buildings, the "Allowable Stress Design (ASD)" method has long been used for cold-formed steel structural members in the United States and other countries. In this approach, member forces, or moments, determined on the basis of working loads should not exceed the allowable values. The allowable value is used to prevent the possible structural failure by using an appropriate factor of safety selected primarily on the basis of engineering judgment and long-time experience. Recently, in the United States, the concepts of risk and reliability analysis have been successfully applied to the Load and Resistance Factor Design …
Design Of Automotive Structural Components Using High Strength Sheet Steels Effect Of Strain Rate On Material Properties Of Sheet Steels And Structural Strengths Of Cold-Formed Steel Members, Maher Kassar, Wei-Wen Yu
Design Of Automotive Structural Components Using High Strength Sheet Steels Effect Of Strain Rate On Material Properties Of Sheet Steels And Structural Strengths Of Cold-Formed Steel Members, Maher Kassar, Wei-Wen Yu
CCFSS Library (1939 - present)
In structural design, the material properties of steels and the strengths of cold-formed steel members are affected by strain rate. Two subjects were investigated experimentally and analytically in this study. They are 1) effect of strain rate on mechanical properties of sheet steels in tension and compression, and 2) structural strengths of stub columns and beams subjected to dynamic loads. Three sheet steels with nominal yield strengths ranging from 35 to 100 ksi were studied under different strain rates. A total of 124 tensile coupons and 54 compressive coupons were tested in this phase of study. The structural strengths of …
Design Of Automotive Structural Components Using High Strength Sheet Steels Structural Strengths Of Cold-Formed Steel Members Under Dynamic Loads, Maher Kassar, Wei-Wen Yu
Design Of Automotive Structural Components Using High Strength Sheet Steels Structural Strengths Of Cold-Formed Steel Members Under Dynamic Loads, Maher Kassar, Wei-Wen Yu
CCFSS Library (1939 - present)
INTRODUCTION Since May 1988, the research project on automotive components sponsored by American Iron and Steel Institute (AISI) at University of Missouri-Rolla (UMR) has been concentrated on a study of the effect of strain rate on mechanical properties of sheet steels and the structural behavior and strength of cold-formed steel members subjected to impact loads. The results of the static and dynamic tensile mechanical properties of three selected sheet steels in the virgin condition as well as for the steels subjected to different amount of cold stretchings, were established in 1988 and early 1989. Details of the tension coupon tests …
Tests Of Full Scale Brick Veneer Steel Stud Walls To Determine Strength And Rain Penetration Characteristics, Michael J. Wilson, A. S. Essawy, A. Kluge
Tests Of Full Scale Brick Veneer Steel Stud Walls To Determine Strength And Rain Penetration Characteristics, Michael J. Wilson, A. S. Essawy, A. Kluge
CCFSS Library (1939 - present)
The design, construction and physical testing of five full scale (2.75 m x 5.2 m) brick veneer rain screen wall specimens are reported. Also, the documentation of the design and fabrication of a new test apparatus and of the development of test procedures are major components of the report. The test program included sequences of air pressure loading stages both with and without simulated rain to establish both the structural and rain penetration performances of the test walls. The test walls included four brick veneer/steel stud specimens and one brick veneer/concrete block specimen. Additional tests were performed on bricks, mortar …
Design Of Automotive Structural Components Using High Strength Sheet Steels The Effect Of Strain Rate On Compressive Mechanical Properties Of Sheet Steels, Maher Kassar, Wei-Wen Yu
Design Of Automotive Structural Components Using High Strength Sheet Steels The Effect Of Strain Rate On Compressive Mechanical Properties Of Sheet Steels, Maher Kassar, Wei-Wen Yu
CCFSS Library (1939 - present)
INTRODUCTION Since May 1988, the research project on automotive components sponsored by American Iron and Steel Institute (AISI) at University of Missouri-Rolla (UMR) has been concentrated on a study of the effect of strain rate on mechanical properties of sheet steels and the structural behavior and strength of cold-formed steel members subject to impact loads. The results of the tensile dynamic mechanical properties of three selected sheet steels, in the virgin condition as well as for the steels subjected to different amount of cold stretchings, were estabiished in 1988 and early 1989. Details of the tension coupon tests were presented …
Load And Resistance Factor Design Of Cold-Formed Steel Load And Resistance Factor Design Specification For Cold-Formed Steel Structural Members With Commentary, Ling-En Hsiao, Wei-Wen Yu, Theodore V. Galambos
Load And Resistance Factor Design Of Cold-Formed Steel Load And Resistance Factor Design Specification For Cold-Formed Steel Structural Members With Commentary, Ling-En Hsiao, Wei-Wen Yu, Theodore V. Galambos
CCFSS Library (1939 - present)
FOREWORD This progress report contains the following two parts: Part I: Load and Resistance Factor Design Specification for Cold-Formed Steel Structural Members (pp. i-107). Part II: Commentary on the Load and Resistance Factor Design Specification for Cold-Formed Steel Structural Members (pp. 109-161). The load and resistance factor design specification proposed herein is the revised version of the design recommendations prepared in February 1988 and submitted to American Iron and Steel Institute as Tenth Progress Report. This document was prepared according to the 1986 edition of the AISI Specification for the Design of Cold-Formed Steel Structural Members. The selections of ϕ …
Evaluation Of The Base Test Method For Predicting The Flexural Strength Of Standing Seam Roof Systems Under Gravity Loading, Thomas M. Murray, Steven D. Brooks
Evaluation Of The Base Test Method For Predicting The Flexural Strength Of Standing Seam Roof Systems Under Gravity Loading, Thomas M. Murray, Steven D. Brooks
CCFSS Library (1939 - present)
No abstract provided.
Design Of Automotive Structural Components Using High Strength Sheet Steels The Effect Of Strain Rate On Mechanical Properties Of Sheet Steels, Maher Kassar, Wei-Wen Yu
Design Of Automotive Structural Components Using High Strength Sheet Steels The Effect Of Strain Rate On Mechanical Properties Of Sheet Steels, Maher Kassar, Wei-Wen Yu
CCFSS Library (1939 - present)
INTRODUCTION During recent years, automotive manufacturers have produced lighter vehicles for the purpose of achieving fuel economy. To accomplish the construction of such automobiles, high strength sheet steels with various yield strengths up to 190 ksi have been used for auto parts and structural components 1-9. In order to provide some technical assistance for the design of such high strength steels, the first edition of the "Guide for Preliminary Design of Sheet Steel Automotive Structural Components" was issued by American Iron and Steel Institute (AISI) in February 1981. 10 The use of the Guide was discussed by Errera at the …
Load And Resistance Factor Design Of Cold-Formed Stainless Steel Statistical Analysis Of Material Properties And Development Of The Lrfd Provisions, Shin-Hua Lin, Wei-Wen Yu, Theodore V. Galambos
Load And Resistance Factor Design Of Cold-Formed Stainless Steel Statistical Analysis Of Material Properties And Development Of The Lrfd Provisions, Shin-Hua Lin, Wei-Wen Yu, Theodore V. Galambos
CCFSS Library (1939 - present)
INTRODUCTION 1.1 General Remarks The "Allowable Stress Design" method has long been used for the design of steel structures in the United States. 1,2,3 Recently, the probability-based load and resistance factor design (LRFD) criteria have been successfully applied to the structural design of hot-rolled steel shapes and built-up members. 4,5,6 The AISI LRFD Specification is being developed as well for the design of structural members cold-formed from carbon and low alloy steels. 7-17 These design criteria can provide a more uniform degree of structural safety to achieve consistent reliability for different design situations. The probability-based design method is developed on …
Design Of Automotive Structural Components Using High Strength Sheet Steels Structural Strength Of Cold-Formed Steel I-Beams And Hat Sections Subjected To Web Crippling Load, Shin-Hua Lin, Ling-En Hsiao, Chi-Ling Pan, Wei-Wen Yu
Design Of Automotive Structural Components Using High Strength Sheet Steels Structural Strength Of Cold-Formed Steel I-Beams And Hat Sections Subjected To Web Crippling Load, Shin-Hua Lin, Ling-En Hsiao, Chi-Ling Pan, Wei-Wen Yu
CCFSS Library (1939 - present)
INTRODUCTION When cold-formed steel beam webs are subjected to partial edge loading, they may fail by web crippling rather than bending of the beam. Web crippling is caused by a highly localized intensity of the load or reaction. Because of the complexity of the web crippling behavior, empirical expressions are presently used for the design of cold-formed steel beams in buildings and automotive structural components to prevent web crippling. 1,2,3. The research on the structural behavior of cold-formed steel beam webs subjected to web crippling has been conducted at Cornell University and the University of Missouri-Rolla (UMR) under the sponsorship …
Load And Resistance Factor Design Of Cold-Formed Steel: Calibration Of The Aisi Design Provisions, Wei-Wen Yu, Ling-En Hsiao, Theodore V. Galambos
Load And Resistance Factor Design Of Cold-Formed Steel: Calibration Of The Aisi Design Provisions, Wei-Wen Yu, Ling-En Hsiao, Theodore V. Galambos
CCFSS Library (1939 - present)
In the design of steel buildings, the "Allowable Stress Criteria" have long been used for the design of cold-formed steel structural members in the United States and other countries.' In view of the fact that the mathematical theory of probability, which has been so successfully applied in other fields of engineering, would seem to be equally applicable to cold-formed steel design by providing a more uniform degree of structural safety, the "Limit State Design" method based on the probabilistic concept has been used in Canada and Europe for the design of cold-formed steel structural members.' In the United States, a …
Load And Resistance Factor Design Of Cold-Formed Steel Load And Resistance Factor Design Specification For Cold-Formed Steel Structural Members With Commentary, Ling-En Hsiao, Wei-Wen Yu, Theodore V. Galambos
Load And Resistance Factor Design Of Cold-Formed Steel Load And Resistance Factor Design Specification For Cold-Formed Steel Structural Members With Commentary, Ling-En Hsiao, Wei-Wen Yu, Theodore V. Galambos
CCFSS Library (1939 - present)
FOREWORD This progress report contains the following two parts: Part I: Load and Resistance Factor Design Specification for Cold-Formed Steel Structural Members (pp. i-101). Part II: Commentary on the Load and Resistance Factor Design Specification for Cold-Formed Steel Structural Members (pp. 103-148). The load and resistance factor design specification proposed herein is the revised version of the design recommendations prepared in September 1985 and submitted to American Iron and Steel Institute as Seventh Progress Report. This document was prepared according to the 1986 edition of the AISI Specification for the Design of Cold-Formed Steel Structural Members. The selections of ϕ …
Load And Resistance Factor Design Of Cold-Formed Steel Comparative Study Of Design Methods For Cold-Formed Steel, Ling-En Hsiao, Wei-Wen Yu, Theodore V. Galambos
Load And Resistance Factor Design Of Cold-Formed Steel Comparative Study Of Design Methods For Cold-Formed Steel, Ling-En Hsiao, Wei-Wen Yu, Theodore V. Galambos
CCFSS Library (1939 - present)
Allowable Stress Design is the current method used to design cold-formed steel structural members and connections. In this design approach, factors of safety are used to compute the allowable design stresses which are compared to the actual maximum stresses that will occur in the member during the life of the structure. In recent years, the Load and Resistance Factor Design (LRFD) method has been developed for the design of hot-rolled steel shapes and the design of cold-formed steel structural members. This method is based on probabilistic and statistical techniques to account for the many uncertainties involved with the actual design. …
Design Of Cold-Formed Stainless Steel Structural Members Proposed Allowable Stress Design Specification With Commentary, Shin-Hua Lin, Wei-Wen Yu, Theodore V. Galambos
Design Of Cold-Formed Stainless Steel Structural Members Proposed Allowable Stress Design Specification With Commentary, Shin-Hua Lin, Wei-Wen Yu, Theodore V. Galambos
CCFSS Library (1939 - present)
INTRODUCTION This progress report on the design of cold-formed stainless steel structural members contains the following two parts: Part I: Proposed Specification for the Design of Cold-Formed Stainless Steel Structural Members (Third Draft). Part II: Commentary on the Proposed Specification for the Design of Cold-Formed Stainless Steel Structural Members (Second Draft). This project was sponsored by the American Society of Civil Engineers. The financial assistance provided by the Chromium Center, the Nickel Development Institute, and the Specialty Steel Industry of the United States is gratefully acknowledged. Special thanks are extended to members of the ASCE Steering Committee (Dr. Ivan M. …
Design Of Automotive Structural Components Using High Strength Sheet Steels Structural Behavior Of Members Consisting Of Flat And Curved Elements, M. Brad Parks, Wei-Wen Yu
Design Of Automotive Structural Components Using High Strength Sheet Steels Structural Behavior Of Members Consisting Of Flat And Curved Elements, M. Brad Parks, Wei-Wen Yu
CCFSS Library (1939 - present)
Local buckling of stiffened and unstiffened curved elements has been investigated both experimentally and analytically. Stiffened curved elements are supported along both longitudinal edges while unstiffened curved elements are supported along one longitudinal edge with the other longitudinal edge free. A series of stub column, beam, and shear tests have been performed for sections containing curved elements. The tested specimens were formed from sheet steels with yield strengths ranging from 27 to 88 ksi. The radius-to-thickness, R/t, values of the curved elements varied from 12 to 438 whereas the arc length-to-thickness, b/t, ratios ranged from 23 to 218. As a …
Design Of Automotive Structural Components Using High Strength Sheet Steels: Web Crippling Of Cold-Formed Steel Beams, Chiravut Santaputra, Wei-Wen Yu
Design Of Automotive Structural Components Using High Strength Sheet Steels: Web Crippling Of Cold-Formed Steel Beams, Chiravut Santaputra, Wei-Wen Yu
CCFSS Library (1939 - present)
The structural behavior of high strength cold-formed steel beams subjected primarily to web crippling was investigated analytically and experimentally. In this study hat sections and I-beams, formed from five different types of high strength sheet steels commonly used in the automobile industry, were investigated under various loading conditions. The yield strengths of these sheet steels vary from 58 to 165 ksi. In addition to the test data gathered in this phase of study, the experimental results obtained from the beam tests conducted at Inland Steel Company and Ford Motor Company were carefully evaluated. The evaluation indicated that the present available …
Design Of Automotive Structural Components Using High Strength Sheet Steels - Results And Evaluation Of Stub Column Tests For Unstiffened Curved Elements, Wei-Wen Yu, M. Brad Parks
Design Of Automotive Structural Components Using High Strength Sheet Steels - Results And Evaluation Of Stub Column Tests For Unstiffened Curved Elements, Wei-Wen Yu, M. Brad Parks
CCFSS Library (1939 - present)
I. INTRODUCTION A. GENERAL In the past few years, a dramatic increase in the use of high strength sheet steels in automobiles has been brought about by the demand for improved fuel economy and safety of motor vehicles. Many of the automotive structural components, which are made of high strength sheet. steels, consists either partially or totally of curved elements. Therefore, it was decided to include an investigation into the structural behavior of curved elements as a part of a research project entitled, "Structural Design of Automotive Structural Components Using High Strength Sheet Steels." The research project began in early …
Load And Resistance Factor Design Of Cold Formed Steel Comparative Study Of Design Methods For Cold Formed Steel, Lan-Cheng Pan, Wei-Wen Yu, Brian K. Snyder
Load And Resistance Factor Design Of Cold Formed Steel Comparative Study Of Design Methods For Cold Formed Steel, Lan-Cheng Pan, Wei-Wen Yu, Brian K. Snyder
CCFSS Library (1939 - present)
Allowable Stress Design is the current method used to design cold-formed steel structural members and connections. In this design approach, factors of safety are used to compute the allowable design stresses which are compared to the actual maximum stresses that will occur in the member during the life of the structure. In recent years, the Load and Resistance Factor Design (LRFD) method has been developed for the design of hot-rolled steel shapes and the design of cold-formed steel structural members. This method is based on probabilistic and statistical techniques to account for the many uncertainties involved with the actual design. …
Load And Resistance Factor Design Of Cold-Formed Steel Revised Tentative Recommendations - Load And Resistance Factor Design Criteria For Cold-Formed Steel Structural Members With Commentary, Wei-Wen Yu, Theodore V. Galambos
Load And Resistance Factor Design Of Cold-Formed Steel Revised Tentative Recommendations - Load And Resistance Factor Design Criteria For Cold-Formed Steel Structural Members With Commentary, Wei-Wen Yu, Theodore V. Galambos
CCFSS Library (1939 - present)
The "Allowable Stress Design Method" has long been used for the design of cold-formed steel structural members. The "Load and Resistance Factor Design Method" has recently been developed from a research project sponsored by American Iron and Steel Institute. In this method, separate load and resistance factors are applied to specified loads and nominal resistance to ensure that the probability of reaching a limit state is acceptably small. These factors reflect. the uncertainties of analysis, design, loading, material properties and fabrication. They are derived on the basis of the first order probabilistic methodology as used for the development of the …
Comparison And Evaluation Of Web Crippling Prediction Formulas, Monique Bakker, Teoman Peköz
Comparison And Evaluation Of Web Crippling Prediction Formulas, Monique Bakker, Teoman Peköz
CCFSS Library (1939 - present)
Since the use of end and load stiffeners is frequently impractical in thin-walled cold-formed steel construction, the webs of beams a.nd deck oay cripple due to the high local intensity of the load or reaction. In this report three different web crippling prediction formulations are compared with experimental results from five different sources. It is found that these web crippling formulas show considera.ble differences and do not give satisfactory results consistently.
Design Of Automotive Structural Components Using High Strength Sheet Steels - Structural Behavior Of Beam Webs Subjected To Web Crippling And A Combination Of Web Crippling And Bending, Chiravut Santaputra, Wei-Wen Yu
Design Of Automotive Structural Components Using High Strength Sheet Steels - Structural Behavior Of Beam Webs Subjected To Web Crippling And A Combination Of Web Crippling And Bending, Chiravut Santaputra, Wei-Wen Yu
CCFSS Library (1939 - present)
INTRODUCTION In recent years, high strength steels have been used in automotive structural components to achieve weight reduction while complying with Federal safety standards. The current design recommendations, the "Guide for Preliminary Design of Sheet Steel Automotive Structural Components" 1 was issued by American Iron and Steel Institute (AISI) in February 1981. It was recommended for application to materials with yield strength up to 80 ksi. These design expressions are based primalily on the 1968 Edition of the AISI "Specification for the Design of Cold-Formed Steel Structural Members" 2 which was written for the design of buildings. The AISI Specification …
Testing Of Steel Roof Deck Construction, Wei-Wen Yu, Lan-Cheng Pan, S. H. Lin
Testing Of Steel Roof Deck Construction, Wei-Wen Yu, Lan-Cheng Pan, S. H. Lin
CCFSS Library (1939 - present)
INTRODUCTION In recent years, insulated steel roof deck construction has been widely used in industrial and commercial buildings. The use of roof assembly consisting of 3-in. deep, 22-gage, steel deck is being considered by Rooftex, Inc. of Houston, Texas, for Class 1-60 and Class 1-90 assemblies. At the request of Rooftex, two types of tests were conducted at the University of Missouri-Rolla in July 1983. These tests, which consisted of physical tests of steel roof decks and uplift pressure tests of insulated steel roof deck construction, were conducted to obtain the"necessary data for the approval of the Factory Mutual Research …
Laterally Unsupported Purlins Subjected To Uplift, Roger A. Laboube
Laterally Unsupported Purlins Subjected To Uplift, Roger A. Laboube
CCFSS Library (1939 - present)
INTRODUCTION A research study, conducted at Cornell University, provided a theoretical method for evaluating the state of stress for both C- and Z- purlins subjected to wind uplift loading. According to the Cornell analytical method, a Z-purlin has more load carrying capability than a similar C-purlin. Although experimental verification was provided, questions were raised, within the Metal Building Industry, regarding the strength of the C-versus the Z-section. The purpose of the work discussed herein was to develop information regarding the behavior of C- and Z-sections having identical cross-section dimensions. A brief description of the test program, along with a comparison …
Design Of Automotive Structural Components Using High Strength Sheet Steels-Strength Of Beam Webs, Chiravut Santaputra, Wei-Wen Yu
Design Of Automotive Structural Components Using High Strength Sheet Steels-Strength Of Beam Webs, Chiravut Santaputra, Wei-Wen Yu
CCFSS Library (1939 - present)
I. INTRODUCTION In February 1981, the "Guide for Preliminary Design of Sheet Steel Automotive Structural Components" was issued by American Iron and Steel Institute (AISI) for assisting automotive structural designers to achieve weight reduction through the efficient utilization of carbon and high strength steels. 1 These design recommendations were based primarily on the 1968 Edition of the AISI "Specification for the Design of Cold-Formed Steel Structural Hembers,,2 but contained the following major differences with regard to the AISI Specification, which was written 'for the design of buildings: 1,4 a. The design expressions presented in the Guide are based on an …
Testing Of Steel Roof Deck Construction, S. Sucharit, Lan-Cheng Pan
Testing Of Steel Roof Deck Construction, S. Sucharit, Lan-Cheng Pan
CCFSS Library (1939 - present)
No abstract provided.
Design Of Automotive Structural Components Using High Strength Sheet Steels Preliminary Study Of Members Consisting Of Flat And Curved Elements, Wei-Wen Yu, M. Brad Parks
Design Of Automotive Structural Components Using High Strength Sheet Steels Preliminary Study Of Members Consisting Of Flat And Curved Elements, Wei-Wen Yu, M. Brad Parks
CCFSS Library (1939 - present)
No abstract provided.
The Influence Of Local Buckling On The Structural Behavior Of Singly-Symmetric Cold-Formed Steel Columns, Gale P. Mulligan, Teoman Peköz
The Influence Of Local Buckling On The Structural Behavior Of Singly-Symmetric Cold-Formed Steel Columns, Gale P. Mulligan, Teoman Peköz
CCFSS Library (1939 - present)
INTRODUCTION Cold-formed steel sections are formed from thin steel sheets, of typical thickness 0.015-0.25 inches, by either production cold roll forming or by specialized press braking. As a result, it is possible to produce economically a variety of cross-sectional shapes, which have high strength-to-weight ratios. Some structural applications include primary and secondary load-carrying framing members, such as columns, purlins and wall studs; and shear diaphragms, such as floor and roof decks and wall panels (Yu [1973]). Their design is governed by the American Iron and Steel Institute (AISI) Specification [1980], which is unique because of its generality, e.g., no specific …
Design Of Automotive Structural Components Using High Strength Sheet Steels, Wei-Wen Yu, Chiravut Santaputra, M. Brad Parks
Design Of Automotive Structural Components Using High Strength Sheet Steels, Wei-Wen Yu, Chiravut Santaputra, M. Brad Parks
CCFSS Library (1939 - present)
INTRODUCTION In recent years, automobile manufacturers have introduced new lines of lighter vehicles for the purpose of achieving fuel economy. To construct such vehicles, formable and weldable, high strength, sheet steels with yield points ranging up to 140 ksi have been used for parts and structural components. 1.1-1.7 Because various types of newer high strength sheet steels are now available for engineers to reduce car weight and because these steels permit the use of existing production equipment with virtually no change in techniques or production rates, the design criteria for efficient and economical use of these high strength steels in …
An Exploratory Study On The Behavior Of Cold-Formed Steel Wall Studs, Yaochun Zhang, Teoman Peköz
An Exploratory Study On The Behavior Of Cold-Formed Steel Wall Studs, Yaochun Zhang, Teoman Peköz
CCFSS Library (1939 - present)
No abstract provided.
An Exploratory Study On The Behavior Of Cold-Formed Steel Wall Studs, Yaochun Zhang, Teoman Peköz
An Exploratory Study On The Behavior Of Cold-Formed Steel Wall Studs, Yaochun Zhang, Teoman Peköz
CCFSS Library (1939 - present)
GENERAL Cold-formed steel wall studs are widely used in the U. S. and Canada. The 1980 A.I.S.I Specification (Ref. 1) contains provisions for the design of such wall studs based primarily on the research conducted at Cornell University (Refs. 2 and 3). This research involved theoretical and experimental studies on wall studs subjected axial loads only. The Specification provisions on the case of combined axial and lateral loading were derived intuitively and were made intentionally conservative. The excessive conservatism in the provisions for the combined loading case prevents using wall studs as economically as possible. The primary objective of the …