Fundamental period estimation of steel frames equipped with steel panel walls

Liqiang Jiang, Xingshuo Zhang, Lizhong Jiang, Chang He, Jihong Ye and Yu Ran

Abstract

Steel frames equipped with beam-only-connected steel panel wall (SPWF) system is one type of lateral resisting systems. The fundamental period is necessary to calculate the lateral force for seismic design, however, almost no investigations have been reported for the period estimation of SPWF structures, both in theoretically and in codes. This paper proposes a simple theoretical method to predict the fundamental periods of the SPWF structures based on the basic theory of engineering mechanics. The proposed method estimates the SPWF structures as a shear system of steel frames and a shear-flexure system of SPWs separately, and calculates the fundamental periods of the SPWF structures according to the integration of lateral stiffness of the steel frames and the SPWs along the height. Finite element method (FEM) is used to analyze the periods of 45 case steel frames or SPWF buildings with different configurations, and the FEM is validated by the test results of four specimens. The errors cannot be ignored between FEM and theoretical results due to the simplifications. Thus the finial formula is proposed by correcting the theoretical equations. The relative errors between the periods predicted from the final proposed formula and the results of FEM are no more than 4.6%. The proposed formula could be reliably used for fundamental period estimation of new, existing and damaged SPWF buildings.

Key Words

fundamental period; steel panel wall; infilled steel frame; theoretical calculation; finite element

Address

Liqiang Jiang: School of Civil Engineering, Central South University, Changsha 410075, China; National Engineering Laboratory for High-Speed Railway Construction, Central South University, Changsha 410075, China Xingshuo Zhang: School of Civil Engineering, Central South University, Changsha 410075, China Lizhong Jiang: School of Civil Engineering, Central South University, Changsha 410075, China; National Engineering Laboratory for High-Speed Railway Construction, Central South University, Changsha 410075, China Chang He: School of Civil Engineering, Central South University, Changsha 410075, China; National Engineering Laboratory for High-Speed Railway Construction, Central South University, Changsha 410075, China Jihong Ye: Xuzhou Key Laboratory for Fire Safety of Engineering Structures, China University of Mining and Technology, Xuzhou, 221116, China Yu Ran: China Academy of Building Research, Beijing, 100013, China

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