某高层复杂结构常规单元模型与多尺度模型弹塑性时程对比分析

某钢管混凝土叠合柱-钢筋混凝土核心筒结构位于7度抗震设防区域,钢管混凝土叠合柱与钢筋混凝土框架梁采用环梁节点连接,地上结构43层,高度为198.9 m.为研究该超限复杂结构的抗震性能,并探究多尺模型的建模方法,首先采用数值模拟软件ABAQUS建立结构常规单元模型,之后针对钢管混凝土叠合柱环梁节点建立精细单元模型,将其植入到整体结构模型中完成多尺度模型建模.对两种模型进行7度罕遇地震作用下弹塑性时程分析,结果表明采用多尺度模型可同时获得整体结构在动力作用下的响应以及环梁节点在地震下的细观损伤,证明了多尺度模型建模方法的正确性,也为实际工程应用多尺度模拟技术提供了借鉴.

Elasto-Plastic Time History Comparative Analysis of a High-Rise Complex Structure Based on Conventional Element Model and Multi-Scale Model

The building is a hybrid structure of concrete filled steel tubular laminated columns and reinforced concrete core tube,located in 7 seismic intensity area,totally 198.9 m high,in which ring beams are adopted to connect concrete filled steel tubular laminated columns with reinforced concrete frame beams.In order to study the seismic performance of the super high complex structure,and explore the multi-scale modeling method,firstly,numerical simulation software ABAQUS was used to establish a conventional elements structural model.Then a refined ring beam joint model was established,which was embedded into the whole structural model to form the multi-scale model.Elasto-plastic time history analyses of the two models were conducted under 7 degree earthquake waves.Results show that the multi-scale model can simultaneously obtain the response of overall structure and the microscopic damage of ring beam joint.The validity of multi-scale model was proved,and the multi-scale simulation technology provided experience for practical engineering application.