基于新型耗能板提升钢框架节点抗震和抗连续倒塌能力  

ENHANCING ANTI-SEISMIC AND ANTI-PROGRESSIVE COLLAPSE CAPACITY OF STEEL FRAME JOINTS WITH NEW ENERGY DISSIPATION PLATES

作　　者：孟宝[1,2] 杜强强 钟炜辉 段仕超[1] 李亮德 MENG Bao;DU Qiang-qiang;ZHONG Wei-hui;DUAN Shi-chao;LI Liang-de(School of Civil Engineering,Xi’an University of Architecture&Technology,Xi’an,Shaanxi 710055,China;Key Lab of Structural Engineering and Earthquake Resistance,Ministry of Education,Xi’an University of Architecture&Technology,Xi’an,Shaanxi 710055,China)

机构地区：[1]西安建筑科技大学土木工程学院,陕西西安710055 [2]西安建筑科技大学结构工程与抗震教育部重点实验室,陕西西安710055

出　　处：《工程力学》2024年第2期83-97,共15页Engineering Mechanics

基　　金：国家自然科学基金项目(51908449,52178162);西安建筑科技大学人才科技基金项目(RC1827)。

摘　　要：针对全焊节点在地震和连续倒塌条件下有限的抗倒塌能力,该文基于新型耗能板对其进行改进提升。首先通过试验、数值模拟和理论分析相结合的方法揭示了新型耗能板在单调荷载和循环荷载作用下的力学性能;进而通过新型耗能板与节点在地震作用和连续倒塌条件下的协同作用,给出了新型耗能板节点的设计方法。结果表明:新型耗能板在单调和循环荷载作用下的力学性能不同,在单调荷载作用下表现为受拉破坏,在循环荷载作用下表现为剪切破坏;通过算例分析表明,新型耗能板节点的抗震与抗连续倒塌设计方法是合理的;新型耗能板全焊节点在地震和连续倒塌条件下主要经历双塑性区域形成阶段和硬化阶段,其中新型耗能板全焊节点的抗震和抗连续倒塌性能的差异主要体现在硬化阶段;新型耗能板的增加可同时有效提高全焊节点在地震和连续倒塌条件下的承载力、变形和耗能能力。To improve the limited anti-collapse capacity of fully welded joints under earthquake and progressive collapse conditions,new energy dissipation plates(NEDPs)were proposed.Firstly,the mechanical properties of the NEDP under monotonic load and cyclic load were revealed through the combination of test,numerical simulation and theoretical analysis.Then,the design method of the joint with NEDPs was given by considering the synergy of the NEDP and the joint under the condition of earthquake and progressive collapse.The results show that the mechanical properties of the NEDP are different under monotonic loading and cyclic loading,with tensile damage under monotonic load and shear damage under cyclic load.The results show that the anti-seismic and anti-progressive collapse design method of the joint with NEDPs is reasonable.Under the condition of earthquake and progressive collapse,the joint with NEDPs experiences the stage of forming double plastic areas and the hardening stage.The difference between the seismic and progressive collapse properties of the joint with NEDPs is reflected in the hardening stage.The increase of the NEDPs can effectively improve the bearing capacity,deformation and energy dissipation capacity of fully welded joints under earthquake and progressive collapse conditions.

关 键 词：钢框架 节点 新型耗能板 抗震能力 抗连续倒塌能力 

分 类 号：TU391[建筑科学—结构工程]