外文翻译防屈曲支撑在亚洲地位.docxVIP

附录1 英文文章翻译（原文） State of the art of buckling-restrained braces in Asia Qiang Xie Department of Structural Engineering, Tongji University, Shanghai 200092, China Received 3 September 2004; accepted 19 November 2004 Abstract：This paper presents a summary of buckling-restrained braces (BRBs). BRBs show the same loaddeformation behavior in both compression and tension and higher energy absorption capacity with easy adjustability of both stiffness and strength. Research and developments of various types of BRBswith different configurations in Asia, especially in Japan, are introduced. Analyses and experiments are illustrated to show the conditions necessary for restraining steel braces from buckling. Some key issues of BRB configurations, such as gap and debonding processing between core braces and encasing members, contraction allowance in BRBs and necessary clearances between restraining panels and surrounding frames, BRB projection stiffening approaches to prevent it from buckling, are also described. Based on initial deflections of core braces, both stiffness and strength requirements of encasing member to prevent buckling of core brace are given. Applications for both new high-rise steel buildings and the seismic retrofit of existing buildings show good prospects of using BRBs. ? 2004 Elsevier Ltd. All rights reserved. Keywords: Steel frame; Buckling; Buckling-restrained braces; Cyclic loading test; Damper; Hysteretic behavior 1. Introduction Lateral displacements on structural buildings have been of great concern for engineers.In order to minimize the effect of earthquake and wind forces braces have been used successfully. However, when the braces are subjected to large compressive forces they exhibit buckling deformation and show unsymmetrical hysteretic behavior in tension and compression, and typically exhibit substantial strength deterioration when loaded monotonically in compression or cyclically, as shown in Fig. 1(a). If buckling of a steel brace is restrain