(1 南京航空航天大学土木工程系  210016;2 东南大学土木工程学院  南京 210096)
【提要】  板柱结构的周边布置边梁可以提高结构的抗震性能。采用等代框架法分析带边梁的板柱结构发现，边梁的抗扭刚度对内框架的侧向刚度影响较小。在边框架中，等代梁的抗弯刚度比边梁的抗弯刚度大，影响因素有板与边梁的抗弯刚度比、受扭构件与板抗弯刚度的比等，给出了边梁抗弯刚度增大系数的计算方法。
【关键词】  板柱结构  边梁  抗弯刚度  侧向刚度
Study on Influence of Spandrel Beam on Lateral Stiffness of Flat Plate Structures/Wu Qiang1,Cheng Wenrang2(1 Department of Civil Engineering,Nanjing University of Aeronautics & Astronautics,Nanjing 210016,China;2 College of Civil Engineering,Southeast University,Nanjing 210096，China)
Abstract:The seismic performance of flat plate structure can be improved by the spandrel beam.The equivalent frame method is used to analyze the flat plate structure with spandrel beam.The results show that the lateral stiffness of the inner frame is affected little by the torsional stiffness of the spandrel beam.For the side frame,the flexural stiffness of equivalent beam is larger than that of the spandrel beam,and the affected factors are the ratio of the flexural stiffness   of the plate  to that of the spandrel beam and  the  torsional members to that of the plate.The  calculation method of amplification coefficient is given.
Keywords:flat plate structure；spandrel beam;flexural stiffness;lateral stiffness