土木专业毕业设计中英对照外文翻译--建筑结构在冲击负载作用下连续倒塌分析方法-建筑结构(编辑修改稿)

土木专业毕业设计中英对照外文翻译--建筑结构在冲击负载作用下连续倒塌分析方法-建筑结构(编辑修改稿)内容摘要：

ive collapse analysis methods be reliable． For engineers， their methodology to carry out progressive collapse uation need not only to be accurate and concise， but also be easily used and works fast． Thus， many researchers have been spending lots of effort in developing reliable， efficient and straightforward progressive collapse analysis methods recently． The current available methods in analyzing structural progressive collapse could be classified into two major categories， namely the direct simulation method， in which the blast loading effects on structural damage and building collapse are directly simulated， and uncoupled alternative load path method with analysis of the structure by simulating various levels of damage by the removal of key load—carrying members． In the present paper， the available progressive collapse analysis methods in the literature are reviewed according to their categories． Both advantages and disadvantages of each method are listed． Their suitability， applicability and reliability are also discussed． Our recently proposed new method for progressive collapse analysis of reinforced concrete frames under blast 1oads is al so introduced． 1. Progressive collapse analysis methods for building structures. In this section， the current methods for analyzing structural progressive collapse available in the literature are presented in two major categories， namely the direct simulation method and the alternative load path method． Direct simulation method For the direct simulation method， the building structures， air， and explosive are all modeled in detail． Explosion， blast wave propagation and its interaction with structures all need to be simulated， if not， blast and impact loads acting on the building structure should be derived and directly applied to structural ponents． The material nonlinear behavior and dynamic effects and damage due to blast or impact are mostly included in the simulation． This section will list typical applications of direct simulation method in progressive collapse analysis of building structures recently， each with its own characteristic. of building collapse under blast loads Luccioni et al carried out an analysis of structural collapse of an actual building， the AMIA (Israel’s Mutual Society of Argentina)building， which had suffered a terrorist attack and collapsed． In the analysis， the building was modeled using 3一 dimensional solid elements， including the reinforced concrete columns， beams and masonry walls． Fig． 1 gives the configuration of the building model and the location of the explosion. The analysis of the structural collapse of the building was performed in two stages． The first part of the analysis consisted of the simulation of the explosion itself from the detonation instant and the second part consisted of the analysis of the effect and interaction with the building of the blast wave generated by the explosion． Only the load produced by the air blast wave was considered in the analysis． The ground motion generated by the explosion was not taken into account． ig． 2 shows the numerical results of the collapsed building． The parison of numerical results with photographs taken after the terrorist attack showed that the numerical analysis accurately reproduced。