爆炸荷载下钢筋混凝土面板动力响应本构模型分析  

Analysis of Constitutive Model of Dynamic Response of Reinforced Concrete Slab under Explosive Loads

作　　者：刘晓蓬 陈健云 周晶 段绪义 徐强 LIU Xiao-peng;CHEN Jian-yun;ZHOU Jing;DUAN Xu-yi;XU Qiang(College of Water Conservancy and Civil Engeering/Shandong Agricultural University,Tai’an 271018,China;Faculty of Infrastructure Engineering/Dalian University of Technology,Dalian 116023,China;Taishan Polytechnic,Tai’an 271000,China;Qingzhou City Housing Security Cente of Shandong Province,Qingzhou 262500,China)

机构地区：[1]山东农业大学水利土木工程学院,山东泰安271018 [2]大连理工大学建设工程学部工程抗震研究所,辽宁大连116024 [3]泰山职业技术学院建筑工程系,山东泰安271000 [4]山东省青州市住房保障中心,山东青州262500

出　　处：《山东农业大学学报（自然科学版）》2022年第4期640-650,共11页Journal of Shandong Agricultural University：Natural Science Edition

基　　金：国家自然科学基金(51679030);“十三五”国家重点研发专项(2017YFC0404900)。

摘　　要：混凝土是建设工程中的一种主要建筑材料,采用数值方法模拟混凝土结构在爆炸荷载下的动力响应是一种新的趋势。本论文介绍了K&C模型、脆性损伤模型、JH模型和RHT模型的本构特征,并在考虑混凝土的应变率效应和动力放大因数基础上,基于LS-DYNA软件,分别数值模拟计算了钢筋混凝土面板在0.31 kg和0.46 kg的TNT炸药产生的爆炸荷载下的动力响应情况。将数值模拟结果与现场试验结果进行对比分析,结果表明:无论是从纵向、环向和散射裂纹方面,还是从中心位移和层裂区半径方面进行比较,RHT模型的钢筋混凝土面板数值模拟结果与现场试验结果最为相似,最能反映钢筋混凝土面板在爆炸荷载下的动力响应情况。Concrete is the main material in construction engineering,and it is a new trend to use numerical methods to simulate the dynamic response of concrete structures under explosive loads.This paper introduces the constitutive characteristics of K&C model,brittle damage model,JH model and RHT model.Considering the strain rate effect and dynamic amplification factor of concrete,and based on the LS-DYNA software,the dynamics of reinforced concrete slab under the explosive loads of 0.31kg and 0.46kg TNT explosives are numerically simulated and calculated respectively.The comparative analysis of the numerical simulation results and the field test results shows that,whether it is from the longitudinal,circumferential and scattering cracks,or from the center displacement and spall zone radius,the numerical simulation results of the RHT model are most similar to the experimental results,and can best describe the dynamic response of reinforced concrete slab under explosive loads.

关 键 词：爆炸荷载 钢筋混凝土 本构模型 

分 类 号：TU528.571[建筑科学—建筑技术科学]