中强地震下建筑结构动力弹塑性损伤模型研究
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摘要
抗震性能是建筑设计中的一项重要指标,需要对地震作用下的建筑结构动力弹塑性损伤情况进行分析。提出一种中强地震下建筑结构动力弹塑性损伤模型研究方法。从有效应力与Cauchy应力张量\,建筑材料损伤演化方程等方面对弹塑性损伤模型基本原理进行分析,以此为理论基础,分析建筑材料应变率与建筑结构损伤能释放率的相关关系,通过Bonora损伤模型获取失效建筑材料损伤指数,并计算整体建筑结构构件损伤指数,以建筑材料损伤指数和建筑结构构件损伤指数为依据,完成中强地震下的建筑结构动力弹塑性损伤模型构建。利用实例进行分析,地震加速度值为0.3g的情况下,该模型的建筑结构相对位移时程曲线与实际位移曲线拟合度较高,且具有较好的建筑结构动力弹塑性损伤模拟精度,表明该模型具有一定的可行性。
The anti-seismic performance is an important index in building design; therefore, analyzing the elastoplastic damage of a building structure under earthquake is necessary. In this paper, an elastic-plastic damage model of building structures under moderate and strong earthquakes is proposed. The basic principle of the elastic-plastic damage model is analyzed from the aspects of the effective stress, the Cauchy stress tensor, and the damage evolution equation of building materials. Based on this, the relationship between the strain rate of the building material and the damage energy release rate of the structure is analyzed. The damage index of failure of a building material is obtained through the Bonara damage model, and the damage index of the building structural component is calculated. On this basis, the dynamic-plastic damage model of the building structure under moderate and strong earthquakes is constructed. When the seismic acceleration value is 0.3g, the relative displacement time history curve of the building structure is fitted with the actual displacement curve, and the dynamic elastic-plastic damage simulation accuracy of the building structure is good. The results show that the model is feasible to a certain extent.
The anti-seismic performance is an important index in building design; therefore, analyzing the elastoplastic damage of a building structure under earthquake is necessary. In this paper, an elastic-plastic damage model of building structures under moderate and strong earthquakes is proposed. The basic principle of the elastic-plastic damage model is analyzed from the aspects of the effective stress, the Cauchy stress tensor, and the damage evolution equation of building materials. Based on this, the relationship between the strain rate of the building material and the damage energy release rate of the structure is analyzed. The damage index of failure of a building material is obtained through the Bonara damage model, and the damage index of the building structural component is calculated. On this basis, the dynamic-plastic damage model of the building structure under moderate and strong earthquakes is constructed. When the seismic acceleration value is 0.3g, the relative displacement time history curve of the building structure is fitted with the actual displacement curve, and the dynamic elastic-plastic damage simulation accuracy of the building structure is good. The results show that the model is feasible to a certain extent.
引文
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[10] 杜永峰,祁磊,包超,等.基于弹塑性地震响应的轻型消能摇摆架-框架结构损伤性能分析[J].工程抗震与加固改造,2016,38(1):98-104.DU Yongfeng,QI Lei,BAO Chao,et al.Damage Performance Analysis of Energy-Dissipative Light Rocking Frame Structure on the Basis of Elasto-Plastic Seismic Response[J].Earthquake Resistant Engineering and Retrofitting,2016,38(1):98-104.
[11] 段瑾,余志伟,方礼凯.超高层结构动力弹塑性分析方法研究[J].建筑结构,2016(1):24-29.DUAN Jin,YU Zhiwei,FANG Likai.Dynamic Elastic-Plastic Analysis of Super-tall Structures[J].Building Structure,2016(1):24-29.
[12] 张敏,李峰.振动环境下建筑工程抗震性检测系统的设计与实现[J].现代电子技术,2017,40(3):106-109.ZHANG Min,LI Feng.Design and Implementation of Building Engineering Anti-seismic Detection System under Vibration Environment[J].Modern Electronics Technique,2017,40(3):106-109.
[13] 王晓飞,王鹏飞,贾虎,等.基于时变地震损伤模型的多龄期钢框架结构易损性分析[J].地震工程学报,2016,38(2):192-200.WANG Xiaofei,WANG Pengfei,JIA Hu,et al.Seismic Vulnerability Analysis of Multiage Steel Frame Structures Based on Time-varying Seismic Damage Model[J].China Earthquake Engineering Journal,2016,38(2):192-200.
[2] 王东方.某超高层建筑罕遇地震下的结构弹塑性分析[J].山西建筑,2016,42(10):42-43.WANG Dongfang,WANG Dongfang.Dynamic Elastic-Plastic Analysis of a High-Rise Structure Exposed to Severe Earthquake[J].Shanxi Architecture,2016,42(10):42-43.
[3] 任重翠,刘军进,徐自国,等.某三角形平面超限高层建筑结构动力弹塑性分析[J].建筑结构,2015(23):28-33.REN Chongcui,LIU Junjin,XU Ziguo,et al.Dynamic Elasto-Plastic Analysis of an Out-of-code High-rise Building Structure with Triangular Plane[J].Building Structure,2015,45(23):28-33.
[4] 曹胜涛,李志山.约束混凝土单轴弹塑性损伤本构模型[J].工程力学,2017,34(11):116-125.CAO Shengtao,LI Zhishan.An Elastoplastic Damage Constitutive Model for Confined Concrete under Uniaxial Load[J].Engineering Mechanics,2017,34(11):116-125.
[5] 邓建,肖明,谢冰冰.三维接触面单元弹塑性损伤数值模拟分析方法[J].中南大学学报(自然科学版),2016,47(7):2383-2389.DENG Jian,XIAO Ming,XIE Bingbing.Three-dimensional Elastic-plastic Damage Numerical Simulation and Analysis Method for Contact Elements[J].Journal of Central South University (Science and Technology),2016,47(7):2383-2389.
[6] 柳玉印,尹训强.考虑结构-土-结构动力相互作用的重力坝地震响应分析[J].水利水电技术,2018,49(10):52-58.LIU Yuyin,YIN Xunqiang.Structure-soil-structure Dynamic Interaction-considered Seismic Response Analysis of Gravity Dam[J].Water Resources and Hydropower Engineering,2018,49(10):52-58.
[7] 高少波,蒋克军,张德成,等.多遇地震下基于PMSAP和MIDAS计算对比对某大型综合性公共建筑进行结构分析[J].四川建筑,2016,36(4):128-130.GAO Shaobo,JIANG Kejun,ZHANG Decheng,etal.Structural Analysis of a Large Comprehensive Public Building Based on PMSAP and MIDAS Calculation Under Frequent Earthquakes[J].Sichuan Architecture,2016,36(4):128-130.
[8] 田英侠,胡高兴,李志军,等.地震动特性对隔震结构弹塑性位移反应谱的影响研究[J].地震工程学报,2016,38(3):353-359.TIAN Yingxia,HU Gaoxing,LI Zhijun,et al.Influence of Ground Motion Characteristics on the Inelastic Displacement Spectra of Isolated Structures[J].China Earthquake Engineering Journal,2016,38(3):353-359.
[9] 蒋连接,魏剑,朱方之,等.远场长周期地震动作用下高层框剪结构地震反应分析[J].科学技术与工程,2017,17(29):332-337.JIANG Lianjie,WEI Jian,ZHU Fangzhi,et al.Analysis on Seismic Response of High-rise Frame-shear Wall Structure under Far-field Long-period Ground Motions[J].Science Technology and Engineering,2017,17(29):332-337.
[10] 杜永峰,祁磊,包超,等.基于弹塑性地震响应的轻型消能摇摆架-框架结构损伤性能分析[J].工程抗震与加固改造,2016,38(1):98-104.DU Yongfeng,QI Lei,BAO Chao,et al.Damage Performance Analysis of Energy-Dissipative Light Rocking Frame Structure on the Basis of Elasto-Plastic Seismic Response[J].Earthquake Resistant Engineering and Retrofitting,2016,38(1):98-104.
[11] 段瑾,余志伟,方礼凯.超高层结构动力弹塑性分析方法研究[J].建筑结构,2016(1):24-29.DUAN Jin,YU Zhiwei,FANG Likai.Dynamic Elastic-Plastic Analysis of Super-tall Structures[J].Building Structure,2016(1):24-29.
[12] 张敏,李峰.振动环境下建筑工程抗震性检测系统的设计与实现[J].现代电子技术,2017,40(3):106-109.ZHANG Min,LI Feng.Design and Implementation of Building Engineering Anti-seismic Detection System under Vibration Environment[J].Modern Electronics Technique,2017,40(3):106-109.
[13] 王晓飞,王鹏飞,贾虎,等.基于时变地震损伤模型的多龄期钢框架结构易损性分析[J].地震工程学报,2016,38(2):192-200.WANG Xiaofei,WANG Pengfei,JIA Hu,et al.Seismic Vulnerability Analysis of Multiage Steel Frame Structures Based on Time-varying Seismic Damage Model[J].China Earthquake Engineering Journal,2016,38(2):192-200.
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