[雙語翻譯]--外文翻譯---支撐鋼筋混凝土框架抗震性能評(píng)估（原文）

1、Available online at www.sciencedirect.comAvailable online at www.sciencedirect.comProcedia EngineeringProcedia Engineering 00 (2011) 000–000 www.elsevier.com/locate/procediaThe Twelfth East Asia-Pacific Conference on St

2、ructural Engineering and Construction Seismic Assessment of Braced RC Frames A Kadid1a, D.Yahiaoui1b 1 Department of Architecture, LARHYA, University of Batna, Algeria Abstract Recent earthquakes in Turkey (1999), Taiwa

3、n (1999) and Algeria (2003) demonstrated the catastrophic impact of such power upon urban cities. A great number of existing buildings in Algeria designed without seismic design criteria and detailing rules for dissipa

4、tive structural behavior suffered damages which were far worse than that for newer buildings designed and built according to the more stringent seismic code rules. Thus, it is of critical importance that the structures

5、 that need seismic retrofitting are correctly identified, and an optimal retrofitting is conducted in a cost effective fashion. Among the retrofitting techniques available, steel braces can be considered as one of the

6、most efficient solution for seismic performance upgrading of RC frame structures. This paper investigates the seismic behavior of RC buildings strengthened with different types of steel braces, X-braced, inverted V brac

7、ed, ZX braced, and Zipper braced. Static non linear pushover analysis has been conducted to estimate the capacity of three story and six story buildings with different brace-frame systems and different cross sections

8、for the braces. It is found that adding braces enhances the global capacity of the buildings in terms of strength, deformation and ductility compared to the case with no bracing, and the X and Zipper bracing systems pe

9、rformed better depending on the type and size of the cross section. © 2011 Published by Elsevier Ltd. Keywords: Seismic design, Strengthening, RC frames, Steel bracing, Pushover Analysis 1. Introduction Relatively

10、 speaking, seismic retrofitting of buildings is still a new activity for most of structural engineers. The retrofitting of a building requires an appreciation for the technical, economic and social aspects of the issue

11、 in hand. In recent years, steel bracing is commonly used to increase the seismic strength of RC framed structures either for rehabilitation of structures damaged by an earthquake or for a abdelkrim.kadid@gmail.com b dj

12、arir2020@yahoo.fr 1877–7058 © 2011 Published by Elsevier Ltd. doi:10.1016/j.proeng.2011.07.365Procedia Engineering 14 (2011) 2899–2905A. Kadid and D. Yahiaoui / Procedia Engineering 14 (2011) 2899–2905 2901floor bea

13、ms. These zipper struts transfer the unbalanced vertical forces at this location induced by buckling of the braces into the stories above. 3-X-braced 3-V-inverted 3-Zipper-braced

14、 3- ZX-braced 6-X-braced 6-V-inverted 6-Zipper-braced 6- ZX-braced Figure 4 Bracing models 4. Results And Discussions 4.1 Load capacity The strength defines

15、the capacity of a member or an assembly of members to resist actions. This capacity is related to a limit state expressed by the stakeholder. Displacement (m) Tube 140 Displacement (m) Tube 140 Compared to the

16、 bare frame, for the six storey building with the 140 Tube section, the capacity of ZX bracing, Zipper bracing, X bracing and inverted bracing systems is increased by a factor of 6.04, 5.24, 5.16 and 4.47 respectively,

17、 while for the three story building, the capacity of the zipper bracing, ZX bracing, X bracing and inverted is increased by a factor of 16.1, 13.0, 9.1, 9.1 respectively. This indicates that the capacity of RC frames c

18、an be greatly enhanced through the addition of steel braces especially with the ZX and zipper systems and that the number of stories (dynamic characteristics of the structures) determines which system performs better.