大底盘是多塔楼结构重要的抗震单元和薄弱部位,设计应选择合理的计算模型进行分析,并确保中、大震下大底盘的安全性。介绍了大底盘梁、板在中、大震下的设计目标和设计过程。以工程实例对大底盘梁、板进行定量分析,指出设计中应引起重视的问题。 Large chassis is an important anti-seismic unit and weak parts of multi-tower structure, the design should choose a reasonable calculation model for analysis and to ensure the safety of large chassis under large earthquake. Introduced a large chassis beam, board in the earthquake under the design goals and design process. Taking the engineering example to carry on the quantitative analysis to the big chassis beam and the slab, points out that the design should pay attention to the question.