CFRP布加固砌体填充墙抗爆分析与设计

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中图分类号：O383;TU362 国标学科代码：1303599 文献标志码：A

Blast-resistant analysis design CFRP sheet strengthened masonryinfilled walls

WUHao1，CHENWenbin'，CHENDe1.2 （1. 2ooo92，China; 2. ，China）

Abstract：Aimingto investigate theperformancedesign appoachthecarbonfiberreinforced polymer （CFRP）sheet strengthened masonry infilled walls subjected toblast loads，thecommercial finite element program LS-DYNA isfrstlyused to develop thesimplified micro-finite element model masonryinfiled wals the corresponding blast-resistant analysis model the CFRP sheet strengthened wals.By comparing the numerical simulation results with the nine groups field explosion test results the unstrengthening CFRP sheet strengthened masonry infilled wals，，the applicability the present simplified micro-modeling approach，as wellasthe material models parameters masonry CFRPshet nd thecorrespondingcontactalgorithm， isthoroughlyverified.Furthermore，referring tothe CFRPshetseismic strengthenng methods recommended by China stard GB 50608—2020，the dynamic behaviors the prototype masonry infiled walls strengthened with CFRP sheets under blast loads are analyzed compared.It is recommended that the diagonal two-way strengtheningmethodbeadvocated，followedbytheverticaltwo-wayhorizontalful-coverstrengtheningmethods.In contrast，the vertical ful-cover mixed thre-waystrengthening methodsare not recommended. Finally，to simultaeously satisfytheconditions intactCFRP，noscateringdebristhepeakcentraldeflectionthanallthickness tomeettheblastresistantdesigngoaltheangesthescaleddistanceteprototypemasonyinfilledwalswithdiferentarrangementstie bar （non-/cut-f/full-length tie bar） that need to be strengthened under typical sedan （ 227kg equivalent TNT） briefcase bombs （ 23kg equivalent TNT） specified by Federal Emergency Management Agency explode at different scaled distances are determined to be 0.8-2.0m/kg1/3 0.2-1.2mkg1/3 ， respectively. The suggestions for the optimal number CFRP sheet layers for effective blast-resistantdesignare further provided.The arrangementthetie barhaslitteeffectontheoptimal number strengthening layers，only affecting the critical scaled distance at which the wallneeds to be strengthened.

Keywords：blastloads; masonyinfilledwalls;carbon fiberreinforcedpolymer;blast-resistantstrengthening;blast-resistant design

在工业生产和人民生活中，危险化学品和燃气等意外爆炸以及恐怖主义蓄意爆炸袭击可导致重大社会影响和经济损失。（剩余23224字）