摘   要：针对大型动力设备运行时引起某工业厂房井字梁楼盖竖向振动的超限问题，采用增大刚度法（增加板厚和井字梁高度），通过缩尺模型试验研究了冲击荷载作用下井字梁楼盖结构的减振效果，推导出了局部井字梁楼盖结构的缩尺模型与原型结构物理量之间的相似关系，获得了试件的自振频率、动力响应等参数，并将试验结果与ABAQUS有限元模拟结果进行了对比分析。结果表明：适当增加板厚和井字梁高度均能有效降低井字梁楼盖的竖向振动加速度；相比于增加板厚的加固方法，增加井字梁高度的减振效果更佳；缩尺模型试件的实测与模拟竖向振动加速度的变化趋势基本一致，验证了缩尺模型与原型结构物理量之间相似关系的准确性和缩尺模型的有效性。 Abstract: In order to solve the vertical vibration overlimit problem caused by the operation of large power equipment in an industrial building, the method of increasing stiffness (increasing floor thickness and grillage beam height) was adopted to study the vibration reduction effect of the grillage beam floor structure under impact load through scaled model tests. The similarity relationship of physical quantities between the scaled model and the prototype structure of the local grillage beam floor structure was derived, and the natural frequency, dynamic response and other parameters of the specimen were obtained. The experimental results were compared and analyzed with the ABAQUS finite element simulation results. The results show that increasing the floor thickness and grillage beam height can effectively reduce the vertical vibration acceleration of the grillage beam floor. Compared to the reinforcement method of increasing floor thickness, increasing the grillage beam height has a better vibration reduction effect. The measured and simulated vertical vibration acceleration trends of the scaled model specimens are basically consistent, which verifies the accuracy of the similarity relationship of physical quantities between the scaled model and the prototype structure, and the effectiveness of the scaled model.

姚宗健,张宇轩,张林,等.冲击荷载作用下井字梁楼盖的减振加固试验研究[J].混凝土与水泥制品,2025(1):70-76. YAO Z J,ZHANG Y X,ZHANG L,et al.Experimental study on vibration reduction and reinforcement of the grillage beam floor under impact loads[J].China Concrete and Cement Products,2025(1):70-76.

摘   要：基于某多层楼板大开洞结构，采用有限元软件对该结构在8度罕遇地震作用下的楼板应力和动力弹塑性时程进行了分析，研究了开洞情况（未开洞、中部集中开洞、中部均布开洞）、板厚（120 mm、150 mm）、配筋率（0.4%、0.8%）对该结构抗震性能的影响。结果表明：楼板开洞会造成结构的最大层间位移角和基底最大剪力增大，且中部集中开洞的影响比中部均布开洞的影响大；增大板厚或配筋率，结构的最大层间位移角和基底剪力均增大；地震作用下，楼板应力分布趋势与楼板混凝土受压损伤趋势相同；可通过适当增大配筋率来减轻大开洞对楼板的损伤。 Abstract: Based on a multi story floor slab with large openings, finite element software was used to analyze the stress and dynamic elastoplastic time history of the slab under the rare earthquake of 8 degrees. The effects of openings(no openings, concentrated openings in the middle, uniform openings in the middle), slab thickness(120 mm, 150 mm), and reinforcement ratio(0.4%, 0.8%) on the seismic performance of the structure were studied. The results show that floor openings will increase the maximum interlayer displacement angle and the maximum base shear force of the structure, and the influence of concentrated openings in the middle is greater than that of uniform openings in the middle. Increasing the thickness or reinforcement ratio of the slab results in an increase in the maximum interlayer displacement angle and base shear force of the structure. Under the action of earthquake, the stress trend of the floor slab is the same as the compressive damage trend of the slab concrete. The damage to the floor slab caused by large openings can be reduced by appropriately increasing the reinforcement ratio.

陈春桃.大开洞楼板抗震性能的有限元分析[J].混凝土与水泥制品,2025(1):77-80,85. CHEN C T.Finite element analysis of seismic performance of floor slabs with large openings[J].China Concrete and Cement Products,2025(1):77-80,85.