本文对高层建筑结构设计中常遇的两个问题进行了探讨:1.怎样解决商住大厦上部居住层为小开间而下部为大开间的结构布置;2.后浇施工缝在箱基或筏基中应用的几个问题:a,缝内的配筋构造;b,后浇温度缝和后浇收缩缝的差别;c,在某些情况下,采取其它措施来控制温度或收缩裂缝可能比设置后浇施工缝更为有利。 This article discusses two problems that often occur in the design of high-rise building structures: 1. How to solve the structural layout of the residential area in the upper part of the commercial-residential building is a small bay and the lower part is a large bay; 2. Post-cast construction joints in the box foundation or foundation Several problems in the application: a, the reinforcement structure in the seam; b, the difference between the post-casting temperature seam and the post-concretion shrinkage seam; c, in some cases, take other measures to control the temperature or shrink the crack may be more than setting Post-cast construction joints are more advantageous.