Cyclic tests on improved beam-column connections

• Autorzy: Shi Y. J. , Chen Z. F. , Wang Y. Q.
• Języki publikacji: EN

Abstrakty

EN

After the Northridge earthquake in 1994, some researches in USA have identified three critical issues that significantly affect the strength and ductility of beam-column connections: (i) fracture toughness of weld metal, (ii) geometry and size of weld access hole, and (iii) control of panel zone deformation. This paper reports the experimental results from the second phase of a major research program on ductility of welded beam column connections under cyclic loadings which is supported by the Natural Science Foundation of China. The experiments focus on the geometry and size of weld access hole. Three new types of connection details are proposed and eight full size specimens are tested under cyclic loading. The ductility, the stress concentration behaviour, and the hysteretic behavior of these connections are investigated. Moreover, the influence of connection details on both the ultimate strength and the premature fracture behaviour of these connections are also analyzed, formulating advices on improvement of connection details. The experimental results provide valuable information for updating the seismic design code of high-rise steel buildings in China.

Słowa kluczowe

EN

beam-column connections; cyclic tests; fracture failure; steel structures

PL

konstrukcja stalowa; wytrzymałość materiałów; złamanie

• Wydawca: Oficyna Wydawnicza Uniwersytetu Zielonogórskiego
• Czasopismo: International Journal of Applied Mechanics and Engineering
• Rocznik: 2004
• Tom: Vol. 9, no 1
• Strony: 81--89
• Opis fizyczny: Bibliogr. 7 poz., rys., tab.

Twórcy

autor

Shi Y. J.

• Department of Civil Engineering, Tsinghua University, Beijing 100084, CHINA

autor

Chen Z. F.

• Department of Civil Engineering, Tsinghua University, Beijing 100084, CHINA

autor

Wang Y. Q.

• Department of Civil Engineering, Tsinghua University, Beijing 100084, CHINA

Bibliografia

• [1] FEMA (2000): Recommended Seismic Design Criteria for New Steel Moment-Frame Buildings. - Federal Emergency Management Agency, USA.
• [2] Gates W.E. and Morden M. (1996): Professional structural engineering experience related to welded steel moment frames following the northridge earthquake. - The Structural Design of Tall Buildings, vol.5, No.l, pp.29-44.
• [3] Lu L.W. Ricles J.M., Mao Ch. and Fisher J.W. (2000): Critical issues in achieving ductile behavior of welded moment connections. - Journal of Constructional Steel Research, vol.55, No. 1-3, pp.325-341.
• [4] Miller D.K. (1998): Lessons learned from the northridge earthquake. - Engineering Structures, vol.20, No.4-6, pp.249-260.
• [5] Ministry of Construction P.R. China (2001): Code for Seismic Design of Building GB50011-2001.
• [6] Popov E.P., Yang T.S. and Chang S.P. (1998): Design of steel MRF connections before and after 1994 Northridge Earthquake. - Engineering Structures, vol.20, No.12, pp.1030-1038.
• [7] Zhao D.W., Shi Y.J. and Chen H. (2000): Experimental research on beam-column connections under low-cycle cyclic loading. - Building Structures, vol.30, No.9, pp.3-6.