A numerical study on special truss moment frames

Download

index.pdf

Date

2009

Author

Ölmez, Harun Deniz

Metadata

Show full item record

Item Usage Stats

222
views

645
downloads

A three-phase numerical study was undertaken to address some design issues related with special truss moment frames (STMFs). In the first phase, the design approaches for distribution of shear strength among stories were examined. Multistory STMFs sized based on elastic and inelastic behavior were evaluated from a performance point of view. A set of time history analysis was conducted to investigate performance parameters such as the interstory drift ratio and the plastic rotation at chord member ends. The results of the analysis reveal that the maximum interstory drifts are not significantly influenced by the adopted design philosophy while considerable differences are observed for plastic rotations. In the second phase, the expected shear strength at vierendeel openings was studied through three dimensional finite element modeling. The results from finite element analysis reveal that the expected shear strength formulation presented in the AISC Seismic Provisions for Structural Steel Buildings is overly conservative. Based on the analysis results, an expected shear strength formula was developed and is presented herein. In the third phase, the effects of the load share and slenderness of X-diagonals in the special segment on the performance of the system were evaluated. Lateral drift, curvature at chord member ends, axial strain at X-diagonals and base shear were the investigated parameters obtained from a set of time history analysis. The results illustrate that as the load share of X-diagonals increases, the deformations decreases. Moreover, the slenderness of X-diagonals is not significantly effective on the system performance.

Subject Keywords

Civil engineering.

URI

http://etd.lib.metu.edu.tr/upload/12611322/index.pdf
https://hdl.handle.net/11511/19300

Collections

Graduate School of Natural and Applied Sciences, Thesis

Suggestions

OpenMETU
Core

A numerical study on special truss moment frames with Vierendeel openings Olmez, Harun Deniz; Topkaya, Cem (Elsevier BV, 2011-04-01) A two-phase numerical study was undertaken to address some design issues related to special truss moment frames (STMFs). In the first phase, the design approaches for distribution of shear strength among stories were examined. Multistory STMFs sized, based on elastic and plastic analysis, were evaluated from a performance point of view. A set of time history analyses was conducted to investigate performance parameters such as the interstory drift ratio and the plastic rotation at chord member ends. The resu...
A study on the effect of pipe - soil relative stiffness on the behaviour of buried flexible pipes Bircan, Mehmet; Özkan, M. Yener; Department of Civil Engineering (2010) In this study, the effect of pipe-soil relative stiffness on the behaviour of buried flexible pipes was investigated considering the pipe size, material type, stiffness, pipe-soil and natural soil-backfill interfaces and geometry of the trench using the finite element method. For this purpose, a parametric study was conducted to examine the effect of different variables on the resulting earth loads and deformations imposed on the buried pipes. Various types of trench pipe-soil cases were analysed for a cert...
A numerical study on response factors for steel wall-frame systems Arslan, Hakan; Topkaya, Cem; Department of Civil Engineering (2009) A numerical study has been undertaken to evaluate the response of dual systems which consist of steel plate shear walls and moment resisting frames. The primary objective of the study was to investigate the influence of elastic base shear distribution between the wall and the frame on the global system response. A total of 10 walls and 30 wall-frame systems, ranging from 3 to 15 stories, were selected for numerical assessment. These systems represent cases in which the elastic base shear resisted by the fra...
Investigation of strenghthening techniques using pseudo-dynamic testing Kurt, Efe Gökçe; Özcebe, Güney; Department of Civil Engineering (2010) Pseudo-dynamic testing was employed to observe the seismic performance of three different retrofit methods on two story three bay reinforced concrete frame structures. The three test frames have hollow clay tile (HCT) infills in the central bay. All of the test frames represent the seismic deficiencies of the Turkish construction practice such as use of plain reinforcing bars, low strength concrete and insufficient confining steel. Two non-invasive and occupant friendly retrofit schemes suggested in the Tur...
An experimental study on the performance of box type floating breakwaters with screens Kürüm, Mustafa Onur; Ergin, Ayşen; Department of Civil Engineering (2008) In the present thesis the performance of box type floating breakwaters (FBs) with screens under regular waves is examined experimentally in a wave flume. The experiments were conducted in the Coastal and Harbor Engineering Laboratory wave flume, Civil Engineering Department, Middle East Technical University, Ankara. The influence of incident wave characteristics and certain geometric characteristics, such as the width and draft of the structure, on its effciency is examined. Three different widths of the st...

Citation Formats

H. D. Ölmez, “A numerical study on special truss moment frames,” M.S. - Master of Science, Middle East Technical University, 2009.