联肢钢板-混凝土组合剪力墙性能化设计方法及静力弹塑性分析

Performance-Based Design Method and Pushover Analysis on Steel Plate and Concrete Composite Coupled Shear Walls

为代替传统的钢筋混凝土剪力墙,充分发挥组合剪力墙结构体系的良好抗震性能,使其易于满足9度抗震设防的设计要求,同时控制墙肢的厚度,以便获取更大的建筑使用面积,钢板-混凝土组合剪力墙被设计应用于9度区高层建筑结构中。根据LEELATAVIWAT等提出的塑性设计方法,并结合对应的内力调整措施,对基于能量平衡的组合联肢剪力墙结构塑性设计方法进行了相关梳理和推导。并且在9度抗震设防条件下,基于此方法设计了12个联肢组合剪力墙结构算例,采用ABAQUS有限元软件对12个算例进行静力弹塑性分析及抗震性能研究。同时对各个结构算例的静力推覆曲线、结构整体屈服、墙肢内力、连梁剪力发展规律以及结构耦连比指标发展规律进行讨论分析。结果表明,12个结构算例中,耦连比的发展规律在单向推覆分析中符合理论和设计的基本预期,说明联肢组合剪力墙结构的"双重抗震防线"机制目标在基于能量平衡的塑性设计方法中能够较好地得到实现。

In order to replace the traditional reinforced concrete shear wall,achieve good seismic performance and satisfy design provisions without significant increase in wall thickness for more usable floor area,steel plate and concrete composite shear walls are designed and applied to the high-rise buildings located in regions of the 9 th degree seismic fortification level.According to the plastic design method proposed by LEELATAVIWAT,etc.,and combined with the corresponding internal force adjustment measures,the plastic design method of composite shear wall structure based on energy balance is sorted out and deduced.Twelve composite shear walls located in a region of the 9 th seismic fortification level are designed using the proposed plastic design method.The Pushover analysis and seismic performance of twelve examples are studied by using ABAQUS finite element software.At the same time,the static Pushover curves,overall yield of the structure,internal force of wall limb,shear force of coupling beam and coupling ratio are analyzed.Analysis results indicate that the theoretical methods can predict and achieve the expected coupling ratios of the twelve composite walls.The proposed plastic design method can better achieve the performance goal of the"dual seismic resistance"mechanism of steel plate and concrete composite shear wall structures.