Seismic performance of prestressed concrete stand structure supporting retractable steel roof

doi:10.1007/s11709-009-0024-3

Front Arch Civil Eng Chin

2009, Vol. 3

Issue (2) : 117-124 https://doi.org/10.1007/s11709-009-0024-3

RESEARCH ARTICLE

Seismic performance of prestressed concrete stand structure supporting retractable steel roof

Yiyi CHEN(

), Dazhao ZHANG, Weichen XUE, Wensheng LU

State Key Laboratory for Disaster Reduction in Civil Engineering, College of Civil Engineering, Tongji University, Shanghai 200092, China

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Abstract

The seismic behavior of a structural system composed of pre-stressed concrete stand supporting a retractable steel roof was studied, which is typically based on the prototype of engineering project of Shanghai Qizhong Tennis Center. By elasto-plastic finite element analysis and shaking table test, the following were investigated: the effects of roof configurations in opening and closing, the effect of pre-stress on the structural seismic response, and the failure mechanism of the spatial stand frame systems featured with circularly arranged columns and inverse-cone type stands. It was found that the roof status has great effect on the natural period, vibration modes, and seismic response of the whole structure, the stand response to horizontal seismic excitation is stronger in roof opening configuration than in closing state, and the response mode is dominantly translational rather than rotational, though the stand is characterized by its fundamentally torsional vibration mode. The study indicated that the pre-stressed inverse-cone stands can keep the system from global side-sway collapse under gravity loads, even in the case that most columns loose moment capacity.

Keywords retractable steel roof prestressed concrete seismic performance failure mode inelastic response shaking table test

Corresponding Author(s): CHEN Yiyi,Email:yiyichen@mail.tongji.edu.cn

Issue Date: 05 June 2009

Cite this article:

Yiyi CHEN,Dazhao ZHANG,Weichen XUE, et al. Seismic performance of prestressed concrete stand structure supporting retractable steel roof[J]. Front Arch Civil Eng Chin, 2009, 3(2): 117-124.

URL:

https://academic.hep.com.cn/fsce/EN/10.1007/s11709-009-0024-3
https://academic.hep.com.cn/fsce/EN/Y2009/V3/I2/117

Fig.1 Assemblage of structure. (a) Closing configuration; (b) opening configuration

Fig.2 Sketch diagram for prestressed system and data picking points

Tab.1 Key information of modeling

Tab.2 Main analysis cases

Tab.3 Symbols for data picking points

Tab.4 Natural vibration characteristics of the structure

Fig.3 Deformation of roof at certain instant. (a) SHW2 from directional; (b) El Centro from both and direction

Fig.4 Time history curve of direction displacements of WK under case of E220. (a) Numerical results; (b) test results

Fig.5 Effect of roof status on plastic displacement

Fig.6 Hinge distribution after major earthquake. (a) Case E220 after quake in closing state; (b) case E220 after quake in opening state

Fig.7 Failure image of the test model

Tab.5 Comparison of occurrence of plastic hinges

Tab.6 Columns’ axial forces caused by tensioning /kN

Tab.7 Effect of prestressing on natural characteristics

Tab.8 Numerical variation of axial force of tendons /kN

Tab.9 Field measurement of tendon’s strain variation in shake table test /μ?

Fig.8

Fig.9 Crack closing effect caused by prestressing

Tab.10 Maximum displacements under rarely occurred earthquake in intensity VII by numerical analysis /mm

Tab.11 Extrapolated peak displacement of prototype under rarely occurred earthquake in intensity VII /mm

Fig.10 Schematic model for structure failure mechanism. (a) Temporary system; (b) mechanism

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