Analysis of Steel Fixed Column Bases
Mostafa Nour Eldin Mohamed AbdAllah;
Abstract
- In this thesis the author discussed many subjects, which could be summarized in the following points, charts and graphical representation:
1) Brief mentioning of the following building codes and researches for design of fixed column base connection, their assumptions and their pros and cons:
a) AISC first edition method.
b) AISC second edition method
c) EURO Code method.
d) A non famous design code (Iranian Code of practice)
e) The most related papers to the subject were briefly mentioned
2) Validation of Finite element modelling process, which was done by using published experimental tests results of three experimental programs, then performing finite element modelling for the test specimen, then comparing the results which were quite satisfactory.
3) Providing a graphical representation for the currently used AISC first edition, providing a design curve to obtain the length of the contact compression length (y), and another curve to obtain the tensile forces in the anchor rods, where a fixed column base connection can be solved quite easier, faster and with the same reliability as in manual calculations .
4) Comparing between anchor tension resulting from both of AISC first edition & EURO Code, based on about 1600 connections, the EURO Code showed to produce 16.4% more anchor tension than the AISC
5) Performing extensive FEM parametric study of fixed column base connection, resulted in obtaining an anchor rods tension force graphical representation from the raw FEM results.
6) Processing the FEM output, which resulted in obtaining some interesting observations, the author was able to provide a new approach for design of fixed column base connection, which was quite simple, accurate, logical and eliminated most of the complicated calculations required in the EURO Code or the AISC, yet quite credible method based on FEM output.
7) Further processing from the FEM outputs, the author produced a graphical representation for the proposed design method .
8) The Author finally compared between the anchor tension force resulting from the proposed method and that of finite element, the proposed method produced 5.7% more anchor tension than finite element output, then he compared the proposed anchor tension with both the AISC first edition and the EURO Code, the proposed method produced 5.2% less anchor tension than the EURO Code, and 6.6% more anchor tension than the AISC first edition, which means that the proposed method is a moderate method, not as conservative as the EURO Code, nor tolerant as the AISC first edition.
1) Brief mentioning of the following building codes and researches for design of fixed column base connection, their assumptions and their pros and cons:
a) AISC first edition method.
b) AISC second edition method
c) EURO Code method.
d) A non famous design code (Iranian Code of practice)
e) The most related papers to the subject were briefly mentioned
2) Validation of Finite element modelling process, which was done by using published experimental tests results of three experimental programs, then performing finite element modelling for the test specimen, then comparing the results which were quite satisfactory.
3) Providing a graphical representation for the currently used AISC first edition, providing a design curve to obtain the length of the contact compression length (y), and another curve to obtain the tensile forces in the anchor rods, where a fixed column base connection can be solved quite easier, faster and with the same reliability as in manual calculations .
4) Comparing between anchor tension resulting from both of AISC first edition & EURO Code, based on about 1600 connections, the EURO Code showed to produce 16.4% more anchor tension than the AISC
5) Performing extensive FEM parametric study of fixed column base connection, resulted in obtaining an anchor rods tension force graphical representation from the raw FEM results.
6) Processing the FEM output, which resulted in obtaining some interesting observations, the author was able to provide a new approach for design of fixed column base connection, which was quite simple, accurate, logical and eliminated most of the complicated calculations required in the EURO Code or the AISC, yet quite credible method based on FEM output.
7) Further processing from the FEM outputs, the author produced a graphical representation for the proposed design method .
8) The Author finally compared between the anchor tension force resulting from the proposed method and that of finite element, the proposed method produced 5.7% more anchor tension than finite element output, then he compared the proposed anchor tension with both the AISC first edition and the EURO Code, the proposed method produced 5.2% less anchor tension than the EURO Code, and 6.6% more anchor tension than the AISC first edition, which means that the proposed method is a moderate method, not as conservative as the EURO Code, nor tolerant as the AISC first edition.
Other data
| Title | Analysis of Steel Fixed Column Bases | Other Titles | تحليل قواعد الأعمدة الحديدية المثبتة | Authors | Mostafa Nour Eldin Mohamed AbdAllah | Issue Date | 2015 |
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