Seismic performance of prestressed concrete stand structure supporting retractable steel roof

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 inversecone stands can keep the system from global side-sway collapse under gravity loads, even in the case that most columns loose moment capacity.

Experiment of the monitoring prestress loss of prestressed concrete beams with damages under static loading

“…The prestressed concrete structure evolved from the reinforced concrete structure. Prestressed concrete technology was first widely used in European countries to solve the problem of the shortage of steel required for reconstruction after World War II, and then developed rapidly all over the world [1]. Beam-type prestressed concrete structural members are the most widely used among these structural forms of prestressed concrete structures, especially in bridge engineering.…”