新型双功能开缝钢板剪力墙研究

This project aims to develop a new steel slit shear wall for realizing dual functions of seismic damage assessment and energy dissipation simultaneously. By using specially designed steel plate columns with varying sections along the height, damage state of the structure where they are installed can be estimated promptly through inspection of their out-of-plane torsional deformation with naked eyes, which makes it a simply and economical way of conducting seismic damage assessment. Using optimal design, its out-of-plane deformation can be self-restrained and good energy dissipation capacity is achievable without the requirement for additional out-of-plane constraint..This work will establish design equation for determining the dimensions of steel plate columns made from common steel as a function of damage level. By connecting adjacent steel plate columns with narrow strips and optimizing their location and dimension, mainly in-plane behavior can be guaranteed and thus plump hysteresis loops can be obtained. The reliability of adopting this new device for seismic damage assessment will be evaluated with uncertainties from both material property and ground motion taken into consideration. Finally, a practical design method for this new device will be given..This work is an exploratory study for conducting seismic damage assessment using an innovative way, which will extend the application of steel slit shear wall to the field of seismic damage assessment and thus has a broad application prospect. Results of this research will provide theoretical basis and technical support for applying this new device in engineering practice.

本项目拟研发一种新型开缝钢板剪力墙，以同时实现地震损伤评估与消能减震的双重功能。借助于特殊设计的变截面钢板柱，通过肉眼观测其面外扭转变形即可快速判别其所在结构的损伤状态，是一种简便、经济的地震损伤评估新方法；通过优化设计实现其面外变形自约束，不需要额外面外约束措施即可实现优良的消能减震性能。.本工作将针对常用钢材，建立变截面短柱尺寸关于损伤等级的设计公式；在相邻钢板柱间引入连接键，对其尺寸和位置优化设计以确保墙体主要发生面内变形从而获得饱满滞回曲线；综合考虑材料随机性与地震动不确定性的影响，明确利用此新型构件开展地震损伤评估的可靠度；最后建立此新型构件的实用设计方法。.本工作是对一种全新的地震损伤评估方法的探索性研究，将使开缝钢板剪力墙的应用范围扩展至地震损伤评估领域，具有广阔的应用前景。本研究成果将为此新型构件应用于工程实际提供理论基础和技术支撑。

本项目研究了一种新型开缝钢板剪力墙，目标是同时实现震害损伤评估与消能减震功能。震害损伤评估功能的实现是借助于特殊设计的变截面钢板柱，通过肉眼观测其面外扭转变形来快速判别其所在结构的损伤状态，是一种简便、经济的地震损伤评估新方法。重点研究了钢材种类与加载制度对震害损伤评估的影响，建立了变截面钢板柱的归一化设计公式。消能减震功能的实现则由缝间钢板柱的受弯剪变形实现，同时通过优化设计引入连接键实现其面外屈曲变形自约束，不需要额外面外约束措施即可实现优良的消能减震性能。设计的连接键构造简单，有效地提高了消能减震性能。本项目采用数值分析与试验研究相结合的方法，论证了利用此新型开缝钢板剪力墙可以实现预期目标。项目研究成果进一步拓展了开缝钢板剪力墙的应用范围，具有良好的市场前景。