(上海长福工程结构设计事务所，上海 200011)

［摘要］归纳了6种类型的不规则楼板，简述了它们的受力特点和分析要点。结合两个工程实例，应用弹性楼板模型对不规则楼板的平面应力及楼板与竖向构件之间的相互影响进行了详细剖析。当楼板的凹槽或洞口实质性地改变了水平力的传力途径，可能会造成应力集中，影响到竖向构件的内力分布。凹槽附近，除了楼板需要加强以外，对竖向构件也要采取加强措施，避免过早出现塑性铰，成为结构的薄弱部位。对于刚度较强的电梯井壁，井道贯通、楼板缺失，通过竖向构件也是可以传递水平力剪力、协调变形的。但是对井壁角部的应力水平应加以注意，尤其是处于高烈度区结构的顶部区域。

［关键词］楼板；楼板不规则；楼板-竖向构件相互影响

Slab irregularity and its effects on seismic design of the structure

Fu Changsheng, Ju Jin(Shanghai Changfu Structural Design Inc., Shanghai 200011, China)

Abstract:The slab irregularity was defined. To study the dynamic behavior of the irregular slab and the slab-vertical element cross-effects, two engineering projects were analyzed by using finite element method. The results show that the deep slot or big holing in slab may change the direction of the in-planar stress flow, resulting in stress concentration both in the slab and vertical elements in vicinity of the slot or hole. Both slab and vertical elements around the slot should be designed for avoiding earlier yielding by the over-strength factor. For lift well, the wall, which is stiff,may resist the horizontal force and be deformed as integrity. However, caution should be taken on the stress intensity at corner of the wall in upper portion of the designed structures in high seismic zone.

Keywords:slab; slab irregularity; slab-vertical element cross-effects

作者简介：扶长生(1944-)，男，上海人，教授级高级工程师，Email:cfstruct@vip.sina.com。

参考文献

［1］Uniform building code［S］. 1997.

［2］WILLIAMS A. Seismic design of buildings and bridges［M］. Engineering Press, 1998.

［3］扶长生. 抗震设计中的扭转耦联问题［J］.建筑结构学报, 2006,27(2):40-46.

［4］FARZAD NAEIM，BOPPANA R RAO. Seismic design of floor diaphragm, Chapter 8 of the seismic design handbook. edited by Farzad Naeim［M］. Boston: Klower Academic Publishers, 2001.

［5］扶长生, 刘春明，李永双，等. 高层建筑薄弱连接混凝土楼板应力分析及抗震设计［J］. 建筑结构,2008,38(3):106-110, 37.

［6］CHRISTOPHER ARNOLD. Architectural considerations, Chapter 6 of the seismic design handbook. edited by Farzad Naeim［M］. Boston: Klower Academic Publishers, 2001.

［7］PETER MARTI. Design of concrete slabs for transverse shear［J］. ACI Structural Journal, 1990, 87(2): 180-190.

［8］Computers & Structures Inc. SAP2000, Concrete shell reinforcement design［M］.1999.

［9］Computers & Structures Inc. SAFE, Integrated analysis and design of slab systems, design manual［M］. 2004.

［10］扶长生, 应俊. 静力非线形分析方法在抗震设计中的应用［J］. 结构工程师, 2004, 20(3): 32-39.

［11］GB50011—2001建筑抗震设计规范［S］.北京：中国建筑工业出版社，2002.

［12］扶长生, 吕西林，康婧. 柱支承双向板及板柱节点的设计与研究［J］. 建筑结构学报, 2009, 30(2):98-106.

［13］JGJ3—2002高层建筑混凝土结构技术规程［S］.北京：中国建筑工业出版社，2002.