近距离爆炸下结构构件破坏分析方法及防护措施研究

The blast loads acting on building structures is not uniform under close-in explosions, and the damage of structural member under such blast loads is local, which is more complex in failure mechanism and damage assessment method as compared to the case of distance explosions. Thus, the blast resistant method of structural member under close-in explosions is facing great challenges. Because of the lack of accurate blast load model, precise damage analysis method, damage assessment method and practical protective measures, this project is intended to carry out research on damage analysis methods and protective measures for structural components under close-in explosions systematically. The main contents include: (1) the simplified blast load model on typical structural components will be established based on the study of the accurate blast load prediction method and its distribution pattern on structural members under close-in ecplosions; (2) the damage analysis and damage assessment methods for typical structural memebrs under close-in explosions will be proposed through the investigation on damage mechanism of structural members and the proposed damage criteron; (3) the unified blast resistant design method and protective measures will be set up from the researcch on the blast resistant design method and protective measures for typical structural components under close-in explosions and on their applicability to the cases of distance explosions. The achievements of this project will further improve China's blast resistant design theory of building structure and provide a theoretical basis and technical support system for the preparation of blast resistant design guidelines for civil constructions.

与远距离爆炸相比，近距离爆炸下作用于建筑结构上的爆炸荷载分布不均匀，局部爆炸荷载作用下结构构件多为局部破坏，其破坏机理与损伤评估方法更加复杂，抗爆设计方法亦面临空前挑战。本项目拟针对近距离爆炸下结构构件破坏分析缺乏准确的爆炸荷载模型，精确的破坏分析与损伤评估方法、实用的防护措施等突出问题，系统开展近距离爆炸下结构构件破坏分析方法及防护措施研究。通过研究近距离爆炸下作用于结构构件上爆炸荷载的准确预测方法及其分布规律，建立作用于典型结构构件上爆炸荷载的简化模型；通过近距离爆炸下结构构件的破坏机理研究，提出其破坏准则，建立近距离爆炸下典型结构构件破坏分析与损伤评估方法；通过研究近距离爆炸下结构构件抗爆设计方法与防护措施及其对远距离爆炸防护的适用性，提出统一的典型结构构件抗爆设计方法与抗爆防护措施。从而进一步完善我国建筑结构抗爆设计理论体系，为编制民用建筑抗爆设计指南提供理论基础与技术支撑。

近距离爆炸下作用于建筑结构上的爆炸荷载分布不均匀，局部爆炸荷载作用下结构构件多为局部破坏，其破坏机理与损伤评估方法更加复杂，抗爆设计方法亦面临空前挑战。本项目针对近距离爆炸下结构构件破坏分析缺乏准确的爆炸荷载模型，精确的破坏分析与损伤评估方法、实用的防护措施等突出问题，系统开展近距离爆炸下结构构件破坏分析方法及防护措施研究。通过研究近距离爆炸下作用于结构构件上爆炸荷载的准确预测方法及其分布规律，建立作用于典型结构构件上爆炸荷载的简化模型；通过近距离爆炸下结构构件的破坏机理研究，提出其破坏准则，建立近距离爆炸下典型结构构件破坏分析与损伤评估方法；通过研究近距离爆炸下结构构件抗爆设计方法与防护措施及其对远距离爆炸防护的适用性，提出典型结构构件的抗爆防护措施。发表学术论文12篇，其中SCI检索论文2篇，EI检索论文4篇，ISTP检索论文1篇；合作编写专著1本；合作培养博士生3人，硕士生8人。上述成果进一步完善了我国建筑结构抗爆设计理论体系，为编制民用建筑抗爆设计指南提供理论基础与技术支撑。