钢骨超高强混凝土框架结构恢复力模型研究

鉴于目前缺乏钢骨超高强混凝土（ＳＲＵＨＳＣ）框架结构的恢复力计算模型，基于ＳＲＵＨＳＣ框架结构低周反复加载试验结果，提出了考虑加载循环退化效应的ＳＲＵＨＳＣ框架结构恢复力模型，运用ＭＡＴ- ＬＡＢ编写了相应的计算程序。通过对比Ｐ－Δ滞回环以及等效黏滞阻尼系数ｈｅｑ、耗能比ζ、功比指数Ｉｗ三个抗震耗能参数的模拟值与试验值，结果表明，滞回环及各参数的吻合度均较好，该恢复力模型可较为准确地反映ＳＲＵＨＳＣ框架结构的主要受力特征，可为ＳＲＵＨＳＣ框架结构的抗震性能研究提供一定的理论依据。

A Restoring Force Model of SRUHSC Composite Frame

Given that there is no suitable model for steel reinforced ultra-high strength concrete(SRUHSC) frame system, a new hysteretic model for SRUHSC frame considering cyclic deterioration effect was proposed based on the low reversed cyclic loading test in this paper. Meanwhile the corresponding MATLAB calculated program was written and applied to simulate the P-Δ hysteretic loops, equivalent viscous damping ratio heq, energy dissipation ratio ζ as well as power ratio index Iw. Results show that the hysteretic loops, heq, ζ and Iw calculated from the presented model have a good agreement with the experiments. The applicability and accuracy of the proposed model was therefore verified. Additionally, the proposed restoring model can describe the seismic performance of SRUHSC frame under cyclic load.