基于宏观单元的不同特征构件和结构数值模拟  

Numerical Simulation of Components and Structures with Different Characteristics Based on Macro Elements

作　　者：罗若帆 郭迅 董孝曜 徐雨阳 LUO Ruofan;GUO Xun;DONG Xiaoyao;XU Yuyang(School of Civil Engineering,Jiaying Univrsity,Meizhou 514015,China;Key Laboratory of Earthquake Engineering and Engineering Vibration,Institute of Engineering Mechanics,China Earthquake Administration,Harbin 150080,China;Key Laboratory of Building Collapse Mechanism and Disaster Prevention,China Earthquake Administration,Sanhe 065201,China)

机构地区：[1]嘉应学院土木工程学院,广东梅州514015 [2]中国地震局工程力学研究所中国地震局地震工程与工程振动重点实验室,黑龙江哈尔滨150080 [3]中国地震局建筑物破坏机理与防御重点实验室,河北三河065201

出　　处：《防灾科技学院学报》2023年第4期1-13,共13页Journal of Institute of Disaster Prevention

基　　金：嘉应学院科研项目(2022KJZ01);国家自然科学基金项目(52278489)。

摘　　要：根据建筑结构中各种不同特征构件的力学模型,在截面行为上采用纤维截面模拟结构构件的压弯行为,剪切铰模拟构件的非线性剪切;在构件组装上采用斜压杆模拟填充墙对角受压的特征,采用一维杆单元来模拟水平和竖向承重墙体;并选取不同特征构件的试验模型,建立相适应的数值模型进行计算分析以验证模型的准确性。结果表明,模型具有较好的适用性。进而选取泸定地震中两个力学行为复杂并发生严重破坏的多层建筑,建立结构模型进行计算,分析结果与实际震害基本吻合,不同特征构件的响应也说明了其破坏的原因。该模拟方法可用于分析和预测类似结构的动力响应。Based on the mechanical models of components with different characteristic in the structure,on the behavior of cross section,the fiber section is used to simulate the compressive and flexural behavior of the components,while the shear hinge is employed to simulate the nonlinear shear behavior.In the aspect of component assembly,the strut is used to simulate the diagonal compression of infill walls,and the one-dimensional rod element is utilized to simulate the horizontal and vertical load-bearing walls.Through selecting the appropriate experimental models for components with different characteristic,the corresponding numerical models are established for calculation and analysis.The results indicate that the models are fairly applicable.Then two multi-story buildings with complex mechanical behavior which are severe damaged hit by the Luding MS6.8 earthquake in 2022 are chosen to construct structural models.The calculation results basically reflect the field actual seismic damage,and the response of components with different characteristic also reveals the causes of the failure of the structure.The simulation method in this paper could be applied for analyzing and predicting the dynamic response of similar types of structures.

关 键 词：不同特征构件 数值模拟 纤维截面 剪切铰 一维单元 

分 类 号：TU317[建筑科学—结构工程]