带可更换自复位消能部件的装配式剪力墙设计与分析

Design Method and Analysis of Precast Reinforced Concrete Shear Wall with Replaceable Self-Centering Energy-Dissipation Components

摘要:

为实现剪力墙的模块化设计和震后功能可恢复，提出了一种带可更换自复位消能部件的装配式钢筋混凝土剪力墙。该新型剪力墙主要由可更换自复位消能部件、底部块体和预制墙板组成，各部分间通过螺栓连接。地震时自复位消能部件能耗散大部分地震能量，并减少结构的残余变形，方便震后更换。提出了该新型剪力墙的设计方法，介绍了基于传统剪力墙设计改进而成的新型剪力墙设计流程。建立了新型剪力墙的有限元数值计算模型，并通过试验结果对比验证了计算模型的准确性。针对三片传统剪力墙设计实例，采用所提出的设计流程将其设计为新型剪力墙，并对新型剪力墙和传统剪力墙进行数值模拟和对比分析。研究结果表明，按该方法设计的新型剪力墙符合设计目标，具有与传统剪力墙相当的承载力和抗侧刚度，并表现出良好的耗能能力以及很强的自复位能力。

Abstract:

To fulfill modular design and post-earthquake function recovery for reinforced concrete shear walls， a novel precast reinforced concrete shear wall with replaceable self-centering energy-dissipation components （RSECs） is proposed in this paper. This novel type of shear wall （named NPRW shear wall） mainly composes of RSECs， bottom blocks， and prefabricated wall panels， where each part is connected by high-strength bolts. When the structural wall is subjected to earthquakes， the RSECs dissipate most of the seismic energy and reduce residual deformation for convenient replacement after earthquakes. The design method of the NPRW shear wall is introduced， in which the design process is based on the conventional shear wall design. A finite element model of the NPRW shear wall is established to simulate the seismic performance of novel shear walls and the accuracy of the numerical model is verified by comparing with the experimental results. For three conventional shear walls design examples， the corresponding NPRW shear walls are designed based on the proposed design process， followed by numerical simulation and comparative analysis between the novel and conventional shear walls. The results indicate that the novel NPRW shear wall designed using the proposed method has similar bearing capacity and lateral stiffness， and exhibits good energy-dissipation capacity， and self-centering capability， which meet the design goal.