爆炸荷载结构等效静载动力系数研究

doi:10.3969/j.issn.1000-1093.2019.10.014

兵工学报 ›› 2019, Vol. 40 ›› Issue (10): 2088-2095.doi: 10.3969/j.issn.1000-1093.2019.10.014

爆炸荷载结构等效静载动力系数研究

耿少波¹，葛培杰²，李洪¹，徐鹏¹

（1.中北大学理学院，山西太原 030051；2.大连理工大学水利工程学院，辽宁大连 116024）

收稿日期:2018-05-07 修回日期:2018-05-07 上线日期:2019-12-18
作者简介:耿少波(1982—)，男，讲师，硕士生导师。E-mail:gengshaobo@nuc.edu.cn
基金资助:
国家自然科学基金项目(51408558)

Equivalent Static Load Dynamic Coefficient for Blast Load

GENG Shaobo¹, GE Peijie², LI Hong¹, XU Peng¹

(1.School of Science,North University of China, Taiyuan 030051, Shanxi, China;2.Faculty of Infrastructure Engineering, Dalian University of Technology, Dalian 116024, Liaoning, China)

Received:2018-05-07 Revised:2018-05-07 Online:2019-12-18

摘要/Abstract

摘要： 为研究爆炸荷载数学模型对结构等效静载动力系数计算结果的影响程度，根据爆炸荷载等效单自由度结构体系弹性与弹塑性微分方程，以超压峰值、正超压冲量相等为对比条件，分别求解线性衰减荷载与指数型衰减荷载两种数学模式下延性比与等效静载动力系数之间的隐式函数表达式；结合我国现行的抗爆设计规范及指数型衰减荷载形状调整参数a，完成了a取值为1.27、1.44及1.61的3种工况动力系数计算，并与相对应的线性衰减荷载结果对比。研究结果表明：规范采用的线性衰减荷载计算模型更适用于延性比β＜3.0的结构设计;指数型衰减荷载可涵盖工程设计延性比β≤5.0的所有范围，且更适用于β≥3.0的结构。

关键词: 爆炸荷载, 等效静载, 动力系数, 弹塑性阶段, 抗爆设计

Abstract: Elastic and elastic-plastic equivalent single-degree-of-freedom (SDOF) differential equations are established for blast load. The relation of load equivalent duration and load real duration can be reached using the same values of overpressure peak and positive overpressure impulse. The displacement solutions are solved for linear and exponential attenuation blast loads. Elastic-plastic process is divided into later and earlier entering elastic-plastic stages for entering plastic time. The function expressions of ductility ratio and dynamical coefficient are deduced for linear and exponential attenuation blast loads with elastic-plastic stages. Three dynamical coefficients for linear and exponential attenuation blast loads with shape adjustment parameters a of 1.27,1.44 and 1.61 were calculated according to a of exponential attenuation blast load and current anti-blast design specifications. The results show that the linear exponential blast load model adopted by anti-blast design code is more suitable for structure design with ductility ratio β＜3.0. The exponential attenuation blast load model can be used for structure design with ductility ratio β≤5.0, especially β≥3.0. Key

Key words: blastload, equivalentstaticload, dynamiccoefficient, elastic-plasticstage, anti-blastdesign

中图分类号:

耿少波，葛培杰，李洪，徐鹏. 爆炸荷载结构等效静载动力系数研究[J]. 兵工学报, 2019, 40(10): 2088-2095.

GENG Shaobo, GE Peijie, LI Hong, XU Peng. Equivalent Static Load Dynamic Coefficient for Blast Load[J]. Acta Armamentarii, 2019, 40(10): 2088-2095.

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第10期2019 年10月兵工学报ACTA
ARMAMENTARIIVol.40No.10Oct.2019

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爆炸荷载结构等效静载动力系数研究

Equivalent Static Load Dynamic Coefficient for Blast Load

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