Abstract：In order to reasonably evaluate the ductility and strength reduction factor of partially-restrained steel frame with RC infill walls (PSRCW), an innovative probability-based method of determining the ductility and strength reduction factor of PSRCW was proposed. The randomness of materials (including of steel, steel bar and concrete) was considered through the Latin-hypercubic sampling approach. A total of 160 PSRCW structures were designed according to current seismic specifications, and the effects of the number of floors, seismic precautionary intensity, and lateral load distribution mode were also investigated. The lateral resistance curves of 160 PSRCW structures were developed based on the pushover analysis, and the ductility and strength reduction factors of PSRCW were determined by using the probability method according to the confidence level of 95%. The analytical results show that the ductility and strength reduction factor of PSRCW exhibit the decreasing tendency with the increase of the number of floors. The seismic precautionary intensity does not produce any obvious effect on the ductility reduction factor of PSRCW, but has the significant influence on the strength reduction factor of PSRCW. Additionally, the ductility and strength reduction factor of PSRCW determined by uniform lateral load distribution mode is much larger than the ones determined by the generalized power load distribution mode.
孙国华 李坤明 魏鑫 王跃. 考虑材料变异性的半刚接钢框架内填RC墙结构的强度折减系数研究[J]. 土木工程学报, 2018, 51(3): 69-80.
Sun Guohua Li Kunming Wei Xin Wang Yue. Study on strength reduction factor of partially-restrained steel frame with RC infill walls considering material variability. 土木工程学报, 2018, 51(3): 69-80.
