主管：中华人民共和国应急管理部
主办：应急管理部天津消防研究所
ISSN 1009-0029  CN 12-1311/TU
消防科学与技术

消防科学与技术 ›› 2020, Vol. 39 ›› Issue (10): 1366-1370.

• • 上一篇    下一篇

爆炸荷载下预应力混凝土梁抗爆性能数值模拟

肖霞，崔磊，刘进朝   

  1. 山东交通职业学院，山东潍坊261206
  • 出版日期:2020-10-15 发布日期:2020-10-15
  • 作者简介:肖霞（1984-），女，山东潍坊人，山东交通职业学院讲师，硕士，主要从事混凝土以及预应力混凝土结构抗爆的研究，山东省潍坊市潍县中路8 号，261206。

Numerical analysis of anti-explosion property of prestressed concrete beams under explosion load

XIAO Xia，CUI Lei，LIU Jin-zhao   

  1. Shandong Transport Vocational College, Shandong Weifang 261206, China
  • Online:2020-10-15 Published:2020-10-15

摘要： 利用有限元软件LS-DYNA 对预应力混凝土梁在爆炸荷载作用下的力学性能进行数值研究。对4 组预应力混凝土梁在爆炸荷载作用下的抗爆性能进行数值模拟，研究预应力大小和混凝土强度对梁抗爆性能的影响。提取跨中最大位移、残余位移、裂缝形态、钢筋应力和支座附近混凝土剪应力，通过与相同爆炸荷载作用下无预应力混凝土梁的性能进行对比，得到预应力对钢筋混凝土梁抗爆性能的影响规律。

关键词: 预应力混凝土梁, 爆炸荷载, 动力响应, 数值分析

Abstract: The mechanical properties of prestressed concrete beam under explosion load is simulated by LS-DYNA. The antiexplosion property of four groups of prestressed concrete beams under explosion load are numerically simulated, the impact of prestress and strength of concrete on the anti-explosion property of beams are investigated. The maximum mid-span displacement, residual mid- span displacement, crack pattern, stress of rebar and the shear stress of concrete near support are analyzed and compared to the unprestressed concrete beams under the same explosion, and the influence rule of prestress on reinforced concrete beams is obtained.

Key words: prestressed concrete beam, explosion load, dynamic response, numerical simulation