نتایج جستجو برای: blast walls

تعداد نتایج: 59730  

Journal: :پژوهشنامه حمل و نقل 0
a. esmaeili kalalagh ministry of roads and transportation, tehran, iran. s.m. marandi asst. prof., department of civil engineering, shahid bahonar university, kerman, iran. p. safapour lecturer, department of computer engineering, shahid bahonar university, kerman, iran.

air cooled blast furnace slag is a by product made of gradually air cooled molten blast furnace slag, and is often stored in stockpiles near the iron mills and usually occupy a wide area around the iron mills. from this perspective the further use of these materials can have its own merits. air cooled blast furnace slag can be used in asphalt mixtures because of their proper frictional properti...

Blast, Pyricularia grisea (Cooke) Sacc., is one of the most destructive diseases of rice worldwide and canresult in significant reductions in yield. The use of resistant cultivars is the most economical and effectiveway of controlling rice blast. A variety of DNA markers, including plant defense-related candidategene markers are available for genetic characterization and molec...

Extensive research has been focused on the progressive collapse analysis of buildings and most of them are based on the alternative path method (APM) with sudden removal of one or several columns. However, in this method the damage of adjacent elements of removed columns under blast conditions was ignored and this issue can lead to an incorrect prediction of progressive collapse. Therefore, in ...

Journal: :International Journal of Integrated Engineering 2022

Numerical investigation becomes a highly demanding tool for the best design in engineering. With one validated numerical result available, further is possible to conduct. Especially, expensive and limited access civilian conduct test like blast experiment. capability of Arbitrary Lagrange Euler (ALE) solver coupling approach between structure air AUTODYN, detail three-dimensional assessment RC ...

Journal: : 2023

One of the main disadvantages when supplying natural gas to air tuyere a blast furnace is low intensity its combustion inside channel. Ring groove on surface channel improves mixing with and increases completeness in it, but reduces durability. ways simultaneously solve these problems install heat-insulating ceramic insert The significantly heat losses through surface, due contact hot walls ins...

Journal: :حفاظت گیاهان 0
فریدون پاداشت دهکایی ابراهیم دودابی نژاد حسن پورفرهنگ سمیه داریوش

blast disease of rice caused by pyricularia oryzae is a potentially damaging disease in northern due to planting of susceptible local cultivars and favorable conditions. to assess the effects of blast on rice yield components and yield loss, one field experiment was conducted at the lowland culture conditions. analysis of blast effects on rice indicated that the maximum yield losses due to unpr...

Journal: :journal of mining and environment 2015
h. mansouri m. a. ebrahimi farsangi

a linear superposition method was used for modeling the time history of the production blast vibrations and optimizing the blast sequence to reduce vibration levels in sar-cheshmeh copper mine, kerman, iran. a single-hole blast for modeling and two double-hole blasts with time delays of 25 and 65 ms between two holes for modeling validation were carried out. the generated vibrations were measur...

Modeling buildings response to blast and subsequent progressive collapse interested more and more researchers during the past two decades. Due to the threat from extreme loading, efforts have been made to develop methods of structural analysis and design. In this paper, progressive collapse capacity of steel moment frames was first investigated using alternate load path method, then a nonlinear...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شیراز - دانشکده مهندسی عمران 1391

امروزه خطر انفجار بر روی سازه ها به عنوان یک حادثه تصادفی یا عمل خرابکارانه رو به افزایش است. یکی از روش های ایمن سازی سازه ها در برابر بار انفجار استفاده از سازه های محافظ می باشد. دیوارهای محافظ بتن مسلح یکی از سازه های کارامد و متداول در مقابله با بارهای انفجاری می باشند. به دلیل هزینه بر و طاقت فرسا بودن تحقیقات آزمایشگاهی پدیده انفجار، مدل سازی های نرم افزاری و عددی یکی از روش های مطلوب و ...

Journal: :international journal of civil engineering 0
h. shahnazari iran university of science and technology m. esmaeili iran university of science and technology h. hosseini ranjbar iran university of science and technology

considerations on the explosion resistant design of special infrastructures have increased in the recent years. amongst the various types of infrastructures, road and railway tunnels have a unique importance due to their vital role in connection routes in emergency conditions. in this study, the explosion effects of a projectile impacting on a railway tunnel located in a jointed rock medium has...

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