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Load history-based model for prestressed concrete beam damage evaluationYuan Jianli (Ô¬½¨Á¦), Wang Yi (ÍõÒÇ) and Qian Zhonghui (Ç®ÖÙ»Û) College of Architecture Science and Engineering, Yangzhou University,
Yangzhou 225009, China Abstract: The residual capability of a damaged
structure to resist further load is essential in optimal seismic design and
post-earthquake strengthening. An experimental study on the hysteretic
characteristics of prestressed concrete frame beams under different loading
histories was performed to explore the influence of load history on energy
dissipation and failure characteristics of the member. Based on the test
results, the failure of the beam is defined, and the relationship between the
failure moment under cyclic load and from the skeleton curve is formulated.
Finally, based on displacement and energy dissipation, a model for prestressed
concrete beam damage-failure evaluation is developed. In this model, the effect
of deformation level, cumulative dissipated energy, and loading history on
prestressed concrete beam damage¨Cfailure is incorporated, thus it is applicable
to stochastic earthquake forces.
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