Numerical Simulation Of Blast Response For Brick Masonry Wall

The explosion is a process with releasing a large amount of energy in a short time. Oncethe explosion occurred, it will have an enormous destructive effect. Since the event of terroristattacks, accidental gas explosion occurred frequently, the awareness regarding the devastatingdamage to civil infrastructure due to explosive loading has been focused. The dynamicresponse of building structures under blast loading, failure mode, damage assessment, andexplosion prevention measures, etc. become an important subject for researchers andengineers.Although masonry was displaced for many applications by steel and concrete at present,it was widely used for historical buildings due to its aesthetic appearance, and its easy to uselocal materials. It remains of great importance for load bearing walls in low and mediumbuildings and for infilled walls. In this paper, the parameters influencing blast loading factors,the blast response of brick wall are investigated. The main contents are as follows:(1) The present research status of brick masonry wall under blasting load weresummarized. The overpressure formula was fitted based on the experimental data in theliterature and compared results with the calculation of TM5-1300. The influencing factorswere discussed. The peak overpressure, impulse and duration are often used to demonstrateblast loading. The results indicates that the peak overpressure on infinite rigid plane are givenby TM5-1300are different with the test results because of the variety of material properties.(2) The blast effect of the brick wall was simulated using large-scale commercialsoftware ANSYS/LS-DYNA. The brittle damage models are used for brick masonry. Thenumerical results were compared with experimental data in the literature and good agreementscan be observed. The failure modes for different thickness(120mm、240mm、370mm) andconstraints were analyzed. The damage level of the wall was assessed according to theestablished damage criteria. The critical impulse of excessive destruction was obtained.