中文摘要：

汶川、芦山等大地震震害经验表明：地震中建筑遭受的实际烈度经常远高于规范规定的设防烈度,这导致建筑结构在地震中受到非常严重的破坏。虽然随着规范的改进和新的设防区划图的提出,我国建筑抗震的安全水准在不断提升,但是很多专家仍认为目前建筑结构的抗震安全储备偏低。因此,确定合理的地震作用对保证建筑结构的抗震安全性有重要意义。该文以基于2010版《建筑抗震设计规范》设计的一系列钢筋混凝土框架结构为研究对象,通过调整地震动力放大系数、地震作用和荷载分项系数等参数的取值,对框架进行重设计,并对框架结构进行倒塌分析,研究地震作用设计参数调整对框架结构的设计控制指标、地震力、材料用量和抗震安全性造成的影响。研究结果表明：调整措施将使底层柱轴压比增大约8%;楼板和框架梁的钢筋用量提高约6%;对初始破坏始于底层的倒塌模式,调整措施能明显提高结构的抗震安全性,但随着设防烈度提高,地震下抗倒塌能力的提高程度略有降低。

英文摘要：

The experience of Wenchuan earthquake and Lushan earthquake shows that the actual seismic intensity suffered by buildings was often much greater than the code-specified seismic design intensity, which caused very serious damage to buildings. Although the seismic safety margin of buildings in China is in continuous improvement with the updating of seismic design code and seismic hazard map, many experts still believe that to date the seismic safety level of buildings in China is not sufficient yet. Hence, how to determine the reasonable seismic action is important and meaningful to ensure the seismic safety. Based on a series of reinforced concrete frames designed according to the Code for Seismic Design of Buildings（GB 50011-2010）, these frames are redesigned with the adjustments of seismic design parameters, including dynamic amplification factor（？max）, seismic action, and dead and live load combination factors. The earthquake-induced collapse analysis is conducted for these frames. Consequently, the influence of the adjustments on the seismic forces, material consumption and seismic safety is discussed. The results indicate that the parameters adjustments make the axial compression ratio for columns increase by about 8%, and the reinforcement ratio for beams and slabs increase by about 6%. For frames whose collapse starts from the bottom story, the parameters adjustments can obviously improve the seismic safety of the frames. However, with the increasing of seismic design intensity, the increased amplitude of seismic safety will decrease slightly.