内爆炸作用下含填充墙RC框架结构破坏分析

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振动与冲击 ›› 2025, Vol. 44 ›› Issue (5) : 289-301.

冲击与爆炸

内爆炸作用下含填充墙RC框架结构破坏分析

陈公轻1，吴昊1，欧渊*2，王帆2，吕晋贤1

作者信息 +

Destruction analysis of RC frame structure with infill walls under internal explosion

CHEN Gongqing1, WU Hao1, OU Yuan*2, WANG Fan2, L Jinxian1

Author information +

文章历史 +

摘要

爆炸作用下地面建筑目标的破坏分析对制定实战打击策略和工程防护具有重要的实践指导意义。采用LS-DYNA有限元分析软件对已有含填充墙钢筋混凝土（RC）框架结构的近区爆炸试验进行复现，充分验证了所采用的精细化数值仿真方法的适用性。结合建筑结构混合单元建模方法，对典型三层含填充墙RC框架结构在典型战斗部（100kg和200kg TNT当量）爆炸作用下的动态响应开展了仿真分析，考察了爆炸波在结构内部的传播和结构损伤特性。基于等效单自由度（SDOF）方法预测了爆炸荷载作用下框架结构梁、柱、板和填充墙等构件的损伤等级，建立了内爆炸作用下建筑目标的破坏简化分析方法，并通过与精细化数值仿真结果对比检验其适用性。结果表明：在100kg和200kg TNT爆炸工况下，精细化数值仿真分析中建筑物整体功能性和结构性毁伤等级均为中度和轻度，等效SDOF简化分析得到的相应毁伤等级与数值仿真结果一致。此外，从各构件的毁伤等级可以看出，相比于板、梁和柱等承重构件，砌体填充墙更易发生破坏，从而导致爆炸波在层内水平方向房间的毁伤破坏范围更大。

Abstract

Damage analysis of ground building under blast loading has significant practical guidance for developing combat strike strategies and engineering protection design. The LS-DYNA finite element analysis software is used to reproduce the existing near-field explosion test of the reinforced concrete (RC) masonry-infilled frame structure, which fully verifies the applicability of the adopted refined numerical simulation method. Combined with the hybrid element modeling method of building structures, a simulation analysis is carried out on the dynamic response of the three-story masonry-infilled RC frame under the explosion of typical warheads (100kg and 200kg TNT equivalent). The propagation of blast waves inside the structure and structural damage characteristics are investigated. Based on the equivalent single-degree-of-freedom (SDOF)method, the damage degrees of RC beams, columns, slabs and infill walls under blast loads are predicted, and a damage assessment method for building structures under internal explosions is established. Its applicability is verified by comparing with the refined numerical simulation results. It indicates that, under 100kg and 200kg TNT explosion conditions, the overall functionality and structural damage degrees of the building in the refined numerical simulation are both moderate and slight. The corresponding damage degrees obtained by the equivalent SDOF simplified assessment are consistent with the refined numerical simulation results. In addition, it can be seen from the damage degree of members that compared with load-bearing components, i.e. slabs, beams and columns, masonry infill walls are more prone to failure, resulting in a larger damage range of rooms in the horizontal direction within the floor.

导出引用

陈公轻1, 吴昊1, 欧渊2, 王帆2, 吕晋贤1. 内爆炸作用下含填充墙RC框架结构破坏分析[J]. 振动与冲击, 2025, 44(5): 289-301

CHEN Gongqing1, WU Hao1, OU Yuan2, WANG Fan2, L Jinxian1. Destruction analysis of RC frame structure with infill walls under internal explosion[J]. Journal of Vibration and Shock, 2025, 44(5): 289-301

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