American Journal of Civil and Environmental Engineering  
Manuscript Information
Influence of Connection Flexibility on the Dynamic Capacity of Semi-rigid Frames
American Journal of Civil and Environmental Engineering
Vol.3 , No. 3, Publication Date: May 31, 2018, Page: 52-58
954 Views Since May 31, 2018, 251 Downloads Since May 31, 2018

Lu Xiaosong, School of Architecture Engineering, Xi’an Technological University, Xi’an, China.


The dynamic response of semi-rigid frames is studied by using a computer program-MATLAB. The connection flexibility is modeled by rigidity index , and advanced deflection-rotation equation is used to build the stiffness matrix of semi-rigid element and frames. Having the same geometry and cross-section semi-rigid frames with different indexes, are examined. The reducing coefficient and lateral rigidity values, representing the real behavior of these frames, are determined. To represent the real behavior, all deformations of a frame are accounted for a dynamic analysis with EI-centro wave. Response characteristics of those multistory frames are compared with reference to their model attributes. The study indicates that connection flexibility tends to increase vibration periods, while it causes vibration frequencies decrease.


Semi-rigid, Rigidity Index, Deformation-Rotation Equation, Dynamic Response


Stelmarch “Analysis and tests of flexibly connected steel frames” [J]. J. of Structural Engineering ASCE Vol. 112 pp. 1573-1588 1986.


W. F. Chen “Practical analysis for semi-rigid frame design” [M] N. Y. World Scientific 1999.10.


Orbison JG. Nonlinear static analysis of three-dimensional steel frames [M]. In: Report No. 82-6. Ithaca, New York: Department of Structural Engineering, Cornell University, 1982.


G. M. Barsan, C. G. Chiorean. Computer program for large deflection elasto-plastic analysis of semi-rigid steel frameworks [J]. Computers and Structures 72 (1999) pp. 699-711.


Lip H. The, Murray J. Clarke. Plastic-zone analysis of 3D steel frames using beam elements [J]. Journal of structural engineering, Vol. 125 No. 11, November, 1999.


Ali etc. “An investigation for semi-rigid frames by different connection models’[J] Mathematical and compytational Applications, Vol. 10 No. 1 pp 35-44, 2005.


M. Soares Filho etc. “Wind pressure in framed structures with semi-rigid connections’ [J] J. of the Braz. Soc. Of Mech. Sci. & Eng. 2004 Vol. XXVI No. 2 pp 180-189.


Sukeo Kawashima, T. Fujmoto “Viberation analysis of frames with semi-rigid connections” [J] Computers & Structures Vol. A No. 1-2 pp 85-92 1984.


W. F. Chen and S. E. Kim, LRFD steel design using advance analysis [M], Florida, CRC Press 1997.


W. F. Chen, Y. Goto and R. Liew, Stability design of semi rigid frames [M], N. Y. Wiley, 1993.


Min Liu, Scott A. Bums.; Multiple fully Stressed Designs of Steel frame Structures with Semi-rigid Connections [J]. Int. J. Numer. Meth. Engng 2003; 58 pp. 821-838.


M. A. Hadianfard R. Razani; Effects of Semi-rigid Behavior of Connections in the Reliability of Steel Frames [J] Structural Safety 25 (2003) pp. 123-138.

  Join Us
  Join as Reviewer
  Join Editorial Board