Seismic Design of R.C. Stairs in Masonry Structure

Abstract:

In view of masonry structures with rigid floor slab, seismic behavior of R. C. stairs and influence of stairs on the stiffness of lateral walls of stair well was analyzed, calculation formulae of the seismic internal forces of stairs were deduced, calculation method of the seismic shear forces considering the seismic effect of stairs on main structure were given out. Analysis and comparison on engineering ensamples were carried out. The results show K-type bracing function of step slabs to main structure is evident. Considering the bracing function, shear deformation of the floor layer and shear forces in the seismic walls are decreased, internal forces in R. C. stairs are increased. Seismic design recommendation of step slab to decrease the seismic forces was presented.

• Periodical: Advanced Materials Research (Volumes 163-167)
• Pages: 4133-4137
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.163-167.4133
• Online since: December 2010
• Authors: Yuan Bing Cheng, Hong Wei Du, Shi Yun Zhang, Liu Zhong Xu
• Keywords: Bracing, Masonry Structure, Reinforced Concrete (RC), Seismic, Stair, Stiffness of Shear

References

[1] Qiao Li, Shichun Zhao: Survey of Earthquake Destroy in WENCHUAN 5. 12(Southwest Jiaotong University Press, Chengdu 2008) (In Chinese).

[2] China Academy of Building Research: Photo Collection of 2008 WENCHUAN Earthquake Damage to Buildings (China Architecture and Building Press, Beijing 2008) (In Chinese).

[3] Youlin Xu: WENCHUAN 5. 12 Earthquake Destroy Survey and Thinking of Building Safety (China Architecture and Building Press, Beijing 2009) (In Chinese).

[4] Wenhao Liang，Qiao Li，Bo Gao: Proceedings of International Conference on Earthquake Engineering (Southwest Jiaotong University Press, Chengdu 2009) (In Chinese).

[5] Baojiang Yi, Shijiao Huang, Shaoge Cheng and et al, in: Destroy Causes Analysis of Building Stairs in WENCHUAN 5. 12 Earthquake, edited by 《WENCHUAN 5. 12 Earthquake Destroy Survey and Rebuilt Analysis Report》edit committee, China Architecture and Building Press, 2008：280-284(In Chinese).

[6] Qiwang Su, Hongru Cai, Li Li and et al: Sichuan Building Science, Vol. 34(4)(2008), pp.165-167(In Chinese).

[7] Ministry of Construction: Building Seismic Design Code (GB50011-2001) (2008 Edition) (China construction press, Beijing 2008) (In Chinese).

[8] Edit group of 《Static Calculation Handbook of Building Structures》: Static Calculation Menu of Building Structures (China Architecture and Building Press, Beijing 1975) (In Chinese).

[9] Aiqun Li, Zhenshi Gao: Seismic Design of Engineering Structures (China Architecture and Building Press, Beijing 2005) (In Chinese).