抗震设防烈度对多层混凝土结构性能的影响

针对多层混凝土结构底层柱抗震能力较差的问题，本文采取提高结构的抗震设防烈度方法，计算分析七度、八度设防下框架梁、柱的轴力、剪力和弯矩。数值结果表明：提高结构的设防烈度，梁、柱的弯矩、剪力、轴力均增大，在底层（第一层）变化最为突出。地震作用下，结构的破坏形式主要表现为底层柱的破坏，因而增大建筑设计中的设防烈度可从根本上解决这一问题。

Influence of seismic fortification intensity for multilayer concrete structure performance

For multilayer concrete structure, the seismic ability of the ground floor column is very poor, improving the seismic fortification intensity of structure is adopted in this paper, the axial force, shear and moment of beam and column are calculated and analyzed in seven degree and eight degree seismic fortification intensity. Numerical results show that with improving the fortification intensity of the structure, the axial force, shear and moment of beam and column increase and the change of the ground floor is the most prominent. In earthquake the destruction of the structure mainly happens in the ground floor column, so this problem is solved fundamentally with increasing fortification intensity in architectural design.