一种新的爆炸荷载分项系数  

A new partial coefficient for explosive load

作　　者：于润清 田佩云 YU Runqing;TIAN Peiyun(Unit 95338 of PLA)

机构地区：[1]中国人民解放军第95338部队

出　　处：《防护工程》2024年第6期34-41,共8页Protective Engineering

摘　　要：以爆炸荷载下钢筋混凝土(RC)柱为研究对象,考虑了爆炸荷载、材料、几何尺寸等参数的不确定性和爆炸荷载下结构极限状态方程的非线性,提出了一种包含超压峰值和冲量2个荷载参数的新的荷载分项系数形式。选取超压峰值-冲量曲线构造RC柱的极限状态方程,根据极限状态方程提出了6种形式的荷载分项系数;选用蒙特卡洛法计算分项系数和失效概率,以离散程度最小为原则,优选出最优形式的荷载分项系数;针对典型爆炸场景,拟合出荷载分项系数与失效概率的关系,参考已有研究验证分项系数的准确性。研究可为荷载分项系数的计算提供一定参考。This paper focuses on reinforced concrete(RC)columns subjected to explosive loads,taking into account the uncertainties associated with explosive load,material properties,geometric dimensions,and the nonlinearity of the limit state equation under explosive loading.A new form of load partial coefficient is proposed,which incorporates two load parameters:overpressure peak and impulse.The limit state equation for RC columns is constructed using the overpressure peak-impulse curve.Based on this limit state equation,six different forms of load partial coefficients are introduced.The Monte Carlo method is utilized to calculate the partial coefficients and failure probabilities,selecting the optimal form of load partial coefficient based on the principle of minimal dispersion.For typical explosive scenarios,the relationship between the load partial coefficients and failure probabilities is fitted,and the accuracy of the partial coefficients is validated refer to existing research.This paper provides a reference for the calculation of load partial coefficients.

关 键 词：RC柱 荷载分项系数 失效概率 蒙特卡洛法 

分 类 号：TU375.3[建筑科学—结构工程]