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Shape optimization of shear steel plate damper with diamond hole[J].计算力学学报,2018,35(4):437~443

Shape optimization of shear steel plate damper with diamond hole
Shape optimization of shear steel plate damper with diamond hole

DOI：10.7511/jslx20170419001

 作者 单位 E-mail 陈聪 浙江科技学院 中德工程师学院, 杭州 310023同济大学 土木工程防灾国家重点实验室, 上海 200092 1989chencong@tongji.edu.cn 吕西林 同济大学 土木工程防灾国家重点实验室, 上海 200092 陈云 海南大学 土木建筑工程学院, 海口 570228

矩形钢板阻尼器在剪力作用下耗能腹板各处受力不均匀，部分区域率先进入塑性而破坏，造成材料浪费甚至阻尼器延性欠佳。为使剪切钢板阻尼器充分发挥材料性能，可将矩形腹板开菱形孔，形成中部菱形孔钢板阻尼器，或两端去除半菱形，形成X型钢板阻尼器。然而，孔洞最优形状鲜有研究，而形状优化方法也很少提及。为了使菱形开孔剪切钢板阻尼器达到更好的滞回性能，对中部菱形孔和X型两种腹板开孔形式的阻尼器进行形状优化。在与试验结果验证的基础上，基于ABAQUS软件平台建立有限元分析模型，利用PYTHON语言开发了一种脚本优化方法，并与软件优化模块对比，分析优化前后的塑性分布和滞回耗能。结果表明，优化后最大塑性应变减小，塑性分布更均匀，利用脚本方法优化后的滞回曲线更饱满，耗能更好，为菱形开孔剪切型阻尼器的设计和优化提供了参考。

The stress in the rectangle web of the steel plate damper under shear forces is not uniform.Some parts of the web enters plastic deformation and become damaged,thus wasting the material and even resulting in poor ductility.To make a full use of the material,a diamond-shaped hole can be made to the rectangle steel web plate could have diamond hole or an X-shaped steel web plate can be made.However,the optimal shape of the diamond-shaped hole has not been researched and the shape optimization method was seldom mentioned.To obtain a better hysteretic performance,the two types of the steel plate dampers are shape-optimized in this paper.The finite element model was verified by the test results firstly,and then the shape was optimized through the optimization module coded by the authors,using scripts developed in PYTHON language based on ABAQUS software.The results of plastic deformation distribution and hysteresis results according to the shapes before and after optimization were compared.Maximum plastic stain were reduced after optimization,which indicates that the stress in the shear steel plate became more uniform.The hysteresis curve of the script optimization method was fuller,and the energy dissipation capacity was better.This paper provides a reference for the design and shape optimization of the shear steel plate damper with a diamond-shaped hole.