钢筋混凝土梁爆损后生存能力计算与分析

Viability Analysis and Numerical Calculation of Damaged Reinforced Concrete Beam

为了评估钢筋混凝土梁在爆炸受损后的生存能力,以确定其继续服役的可能性,控制修复加固的工程量和造价,利用有限元软件ANSYS/LS-DYNA数值模拟分析了在不同炸药量、炸点高度和炸点位置条件下钢筋混凝土梁在爆炸荷载作用下的破坏模式和损毁形态,计算了其爆后剩余承载力和损伤度,并据此评估了其生存能力。结果表明,以受弯承载力的损失程度作为损伤指标来进行钢筋混凝土梁爆后生存能力的评估是可行的,同时可为地面建筑结构抗爆防护研究与结构设计提供参考。

In order to estimate the viability of reinforced concrete beams after blasting,determine the pos-sibility of continued service,and control the quantities and cost of rehabilitation work,it was numerical simulated using finite element analysis software ANSYS / LS - DYNA. The failure mode and damage mor-phology of reinforced concrete beam were analyzed under different explosive charges,explosive heights and explosive positions. The residual capacity after blasting and the damage degree were calculated,and its viability was estimated. The results show the feasibility of estimating the viability of reinforced concrete beam after blasting by the damage degree of its flexure capacity. It also can provide the reference for anti- explosion protection analysis and structure design of building structures.