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Allowable Axial Stress
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David L. Allen – One of the best experts on this subject based on the ideXlab platform.
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A REVIEW AND ANALYSIS OF PILE DESIGN by
, 2015Co-Authors: David L. AllenAbstract:A review of lateral load design of piles is presented. It appears many different methods and Allowable lateral loads are pemitted by the states. One particular method is discussed in detail, and from that method two charts are presented that relate pile deflection to lateral load. Recommendations are given on design criteria for lateral loads. A review of Allowable Axial Stresses is also presented. The results of a brief finite element analysis of pile tip settlement versus load for various conditions are also presented. These results are compared to data obtained from the literature. Recommend at ions on maximum Allowable Axial Stress are given. 17. Key Words 18. Distribution Statemen
Huang Chung-cheng – One of the best experts on this subject based on the ideXlab platform.
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Computer-Assisted Analysis and Design of Steel Column Based on AISC-ASD
土木工程學系, 2014Co-Authors: Huang Chung-chengAbstract:摘 要
壓力構件在結構系統中扮演一個相當重要的角色，也因此一直是過去學者研究之重點。從尤拉公式(1744)、切線模數理論(1889)、
雙模數理論(1895)、Shanley(1947)的真實柱行為理論到Bleich(1952)所提出的非彈性挫屈拋物線公式均是用以分析壓力構件挫屈強度的重要理論。AISC整理過去之研究成果，提供壓力構件之分析設計公式，本研究將對AISC-ASD(1989)壓力構件設計公式作一有系統的整理與推導並以各種不同屬性例題說明之。基於部分壓力構件設計公式(例如組合壓力構件)其計算過程相當冗長複雜，本研究針對ASD設計手冊Part 3中包含之所有型鋼斷面包括組合斷面，編寫電腦輔助計算程式以解決工程師在分析設計時的困擾，以提供業界一個快速評估柱子強度之方法。ABSTRACT
Compressive members play an important role in a structural system and a lot of research has been done in the past. Theories including Euler’s formula, tangent modulus theory, double modulus theory, Shanley’s concept, and Bleich’s inelastic formula are the important ones for evaluating the strength of compressive members. The AISC-ASD of 1989 summarizes the previous research achievements and provides the formulas for the practical design purpose of compressive members.
This research brief the column research in the past and presents the derivations of the column design formulas used in the ASD Design Specification of 1989. The formulas for Allowable Axial Stress Fa, which are used in the ASD Specification, are summarized and carefully reviewed with flow charts and related equations, respectively. The selected examples are designed to illustrate the use of various column sections tabulated in the 1989 ASD design manual. The evaluation of columns with singly symmetric sections, such as double angles and T-section, involves a long and tedious calculation and this calculation is almost impossible for the routine design in practice.
This study overcomes the problem by providing the computer-assisted program for both rolled and built-up sections listed in the ASD design manual of 1989. The computer program is expected to provide the design profession a fast way to calculate the buckling strength of column. Both hand and computer calculations are presented in each selected example and the results are also compared. It was found that the computed values including the most complex cases, which are double angles sections, do match with the tabulated values in the ASD design manual of 1989.中文摘要……………………………………….i
英文摘要………………………………………..ii
目錄……………………………………………iii
圖表目錄………………………………………..v
符號說明………………………………………. vii
第一章 緒論…………………………………….1
1-1前言………………………………………..1
1-2歷史與文獻回顧……………………………….1
1-3研究方法與目標……………………………….3
第二章 壓力構件的挫屈理論…………………………4
2-1 柱彈性挫屈理論……………………………….4
2-2有初始變位(initial out of straightness)的壓力構件..7
2-3 非彈性挫屈理論….10
2-4 熱軋型鋼構件中的殘留應力(residual Stress)………15
2-5 SSRC柱子強度曲線(SSRC strength curve)………….20
2-6 Bjohovde多重曲線設計公式……………………..21
2-7 ASD(1989)壓力構件設計公式…………………….24
2-8 有效長度(effective length)……………………26
2-9 非加勁肢材與加勁肢材…………………………28
2-10 受壓細長桿件(slender members)………………..29
2-11 壓力構件彎曲扭轉挫屈(Flexural-Torsional Buckling)33
第三章 Fortran程式撰寫與使用說明………………….51
3-1 程式撰寫說明………………………………..51
3-2 程式使用說明…………………………………51
3-3 程式之流程圖………………………………..54
第四章 設計實例說明……………………………..57
4-1 前言………………………………………..57
4-2 例題說明……………………………………58
第五章 結論…………………………………….127
參考文獻……………………………………….128
附 錄………………………………………….13