钢板剪力墙结构震损评估及性能修复的理论与试验研究

Based on the research of steel plate shear wall structure, the applicant intends to study the earthquake damage assessment, repair methods and performance after restoration of this structure. The earthquake damage repair of steel plate shear wall structure will be introduced on the design concept which is based on the performance, meanwhile the state of this structural damage levels and quantitative indicators evaluation system will be established. The post-earthquake restoration repair method of traditional bolting and welding connection steel plate shear wall structure will be explored, then the steel plate shear wall structure which can be fast repaired after injury prone fabricated connection points will be researched and developed. A three-stage performance research, including the target level of initial structure, the repair methods of damaged structure and seismic performance of repair damaged structures, will be studied to three different connection steel plate shear wall structures which are new assembled, traditional welding and bolting connection. To get structural failure modes and damage indicators under specific performance standards; to analyze structural performance impact of repair methods and repair stage; The internal transformation mechanism and energy dissipation mechanism will be examined when the repair infilled plate and undamaged framework combine the repair infilled plate and repair framework, simultaneously repair structural seismic performance, hysteretic behavior and failure modes will be mastered, then damage repair design and construction measures will be proposed, which can provide technical support for the restoration of steel plate shear wall structure. The research will promote the transformation of serving the steel structure damage repair work and popularization and application of the new lateral force resisting system.

申请者在钢板剪力墙未受损结构性能的研究基础上，拟开展该结构震后损伤评估、修复方法和修复后性能的理论与试验研究。将基于性能的抗震设计理念引入钢板剪力墙结构震后修复工作，建立该结构损伤状态等级和量化指标评价体系；探索传统栓接和焊接钢板剪力墙结构的震后修复方法，研发易于损伤后快速修复的装配式分灾钢板剪力墙；对新型装配式、传统栓接和传统焊接三种不同连接构造的钢板剪力墙结构开展初始结构目标性能、受损结构修复方法和修复结构抗震性能三阶段全过程性能研究：获取特定性能水准下结构破坏模式和损伤指标，分析修复方法和修复阶段对结构性能的影响，考察修复墙板与未损伤框架及修复墙板与修复框架共同作用时的内力转换机制和耗能机理，掌握修复结构的抗震性能、滞回特性和破坏模式，获取修复性能指标，提出修复设计方法，为钢板剪力墙结构的修复工作提供技术支撑。本研究将进一步推动服役钢结构损伤修复工作的变革和新型抗侧力体系的推广应用。

本课题在前序国家自然科学基金项目“半刚性框架-钢板剪力墙新型结构体系理论与试验研究”以及“半刚性框架-防屈曲剪力墙结构新体系理论与试验研究”取得的系列成果基础上，进一步系统开展了钢板剪力墙结构性能、损伤评估、震后修复方法和修复后性能的理论与试验研究工作。首先，课题通过统计分析已有试验资料，建立了适应于薄钢板墙结构不同性能水准的量化指标体系，并通过数值模拟技术进行了分析验证。随后，基于地震力调整系数提出了钢板剪力墙结构的中震性能化设计概念。在此基础上，设计并完成了钢板剪力墙受损评估及抗震加固的拟静力试验研究。全面考察了损伤钢板剪力墙结构与性能修复结构二次受震的破坏模式及抗震性能。重点对比分析了未加固试件、密肋加固试件、斜向肋加固试件、替换墙板试件在二次荷载作用下承载力、刚度、耗能等抗震性能指标变化；其次，基于试验与数值分析结果，获取了特定性能水准下结构的破坏模式和累计损伤指标，建立了钢板剪力墙结构损伤状态等级和修复量化指标评价体系。依据钢板剪力墙的地震损伤特性，基于理论获得了边缘框架柱最大内力、抗剪强度的近似计算校核公式以及修复加固附加用肋板设计要求，从而构建了基于肋板修复加固钢板剪力墙结构的设计技术体系，便于工程设计人员应用。最后，基于钢板剪力墙的振动台动力分析模型研究了附加肋板加固方法在实际高频动力荷载作用下对结构抗震性能的影响，进一步验证了附加肋板修复加固钢板剪力墙方法的有效性。项目的系列研究成果为钢板剪力墙结构的应用和震后修复提供了有效的理论和试验基础。