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مهندسی عمران وراه وترابری - ترمیم سریع پل‌ های آسیب‌ دیده بدون بستن راه‌ها با دستاورد دانشمند ایرانی
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مرجع مهندسی عمران و راه و ترابری


تیمی از دانشمندان به رهبری «آرش زاغی» دانش‌آموخته دانشگاه‌های صنعتی شریف و خواجه نصیر طوسی و استادیار دانشگاه کانکتیکات، فولادی با استحکام فوق‌العاده بالا (UHSC) را به عنوان راهی مقرون‌به‌صرفه برای ترمیم پل‌های آسیب‌دیده آزمایش کردند.

به گزارش سرویس علمی ایسنا، بر اساس اعلام امریکا، بالغ بر 30 درصد از 600 هزار پل موجود در ایالات متحده بیش از 50 سال عمر دارند و برای فعال‌نگه‌داشتن آن‌ها باید سالانه حدود 20.5 میلیارد دلار هزینه کرد.

دانشمندان به رهبری پروفسور آرش زاغی، بتنی با استحکام فوق‌العاده بالا را برای ترمیم پل‌ها آزمایش کردند. این بتن، ماده محکمی است که برای ترمیم هر چه سریع‌تر پل‌ها با هزینه‌های پایین کارآمد است.

به گفته زاغی، استادیار مهندسی عمران و بازرس ارشد این تحقیق، این شیوه ترمیم، پتانسیل حل مشکلات بحرانی پل‌ های آسیب‌دیده فولادی در سراسر امریکا را به شیوه‌ای خلاقانه دارد.

وی ادامه داد: با تثبیت‌شدن این شیوه، می‌توان پل‌ ها را با هزینه و زمان کمتر احیا کرد و ایمنی زیرساخت‌های حمل و نقل را افزایش داد.

زاغی و تیم علمی‌اش از بتن با استحکام فوق‌العاده بالا برای ترمیم پل‌های فولادی زنگ‌زده استفاده کردند و این بتن‌ها از پل پشتیبانی می‌کنند.

آسیب‌ به پل‌ها در اثر قرارگرفتن آن‌ها در معرض آب و نمک جاده‌ای است که در طول زمستان به کار می‌رود. آزمایش‌ها نشان می‌دهد شیوه جدید دارای مزیت‌های زیادی است و پل‌هایی که با فولاد با استحکام فوق‌بالا ترمیم شده‌اند، 25 درصد محکم‌تر از زمان آسیب‌دیدگی‌شان هستند.

این روش همچنین نیاز به بستن جاده‌ها و مسیرها را تا حد زیادی کاهش می‌دهد زیرا در این شیوه می‌توان هنگامی که پل فعال است، آن را ترمیم کرد.

منبع:خبرگزاری ایسنا





:: برچسب‌ها: پل , ترمیم سریع پل , دانشگاه کانکتیکات , استحكام , جاده , دانشمند ایرانی ,
ن : نوید
ت : سه شنبه 23 تیر 1394
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"We need to build completely to another crescendo, cheri," he said.
"Therefore we could have an ending that'll be as none before."

His smile was decadent, his eyes were full of lust, along with the soft skin of his hard cock against my sex was having its intended
effect. I was feeling a stronger arousal now as I felt
his cock slide between my sensitive lips. I felt the actual top of his cock push agonizingly at the doorway of my pussy, and I desired him to thrust into me hard.
Instead he pulled back and slid his hardness back nearly my clit.


I became aching to get him inside, and I possibly could tell that his should push that wonderful
hard cock inside me was growing. His moans grew to fit mine, and I knew the sense
of my wet pussy lips on the head of his cock was getting excessive both for
of us.

"Allow finale begin," he said, and then he slid the top of his cock inside me.



The two of us gasped because held his cock there for your moment.
I contracted my pussy to drag him further inside, and he threw his head back at
the sensation. Inch by excruciating inch he pushed his cock inside me, with
each time I squeezed my pussy around him. His cock felt wonderful mainly because it filled me,
but I desired everthing inside me. I rolled aside and rested my leg against his shoulder,
and he plunged his cock entirely in.
נערת ליווי ברמת גן چهارشنبه 12 تیر 1398 03:27 ق.ظ
We're having coffee at Nylon Coffee Roasters on Everton Park in Singapore.
I'm having black coffee, he's possessing a cappuccino.
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We're standing ahead of one another talking about our lives, what you want money for hard times, what we're interested in on another person. He starts saying that she
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‘Why Andrew? You're so handsome. I'd never reject you
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‘Oh, I do not know. Everything happens for a good reason right.
But tell me, you would not reject me, might you Ana?' He said.



‘No, how could I?' , I replied

"So, you wouldn't mind if I kissed you today?' he explained as I buy far better him and kiss him.

‘The very next time don't ask, function it.' I reply.

‘I like the way you think.' , he said.

In the meantime, I start scrubbing my calcaneus in the leg, massaging it slowly. ‘What can that suits you in ladies? And, Andrew, don't spare me the details.' I ask.

‘I enjoy determined women. Someone discussion what they have to want. Someone that won't say yes even if I said yes. Someone who's unafraid of trying something totally new,' he says. ‘I'm never afraid when attemping something mroe challenging, especially on the subject of making something totally new in the bedroom ', I intimate ‘And I love girls that are direct, who cut with the chase, like you may did. To become
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נערת ליווי ברמת גן شنبه 8 تیر 1398 02:46 ب.ظ
We're having coffee at Nylon Coffee Roasters on Everton Park in Singapore.
I'm having black coffee, he's creating a cappuccino. He or she is handsome.
Brown hair slicked back, glasses that suit his face, hazel eyes and the most wonderful lips I've seen. He
is well-built, with incredible arms and a chest that is different within this sweater.
We're standing ahead of one another dealing with our lives,
what we really wish for for the future, what we're looking for on another person. He starts saying that he's got been rejected many times.


‘Why Andrew? You're so handsome. I'd never reject you ', I say He smiles at me, biting his lip.


‘Oh, I really don't know. Everything happens for good
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‘No, how could I?' , I replied

"So, can you mind if I kissed you at this time?' he explained as I recieve nearer to him and kiss him.

‘Next occasion don't ask, accomplish it.' I reply.

‘I prefer how you would think.' , he said.

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‘I love determined women. Someone discussion what you want. Someone who won't say yes although I said yes. Someone who's not afraid when you attempt new things,' he says. ‘I'm never afraid of trying something totally new, especially in relation to making something mroe challenging in bed ', I intimate ‘And Everyone loves women who are direct, who cut with the chase, like you only did. To get
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נערות ליווי ברמת גן شنبه 8 تیر 1398 08:18 ق.ظ
We're having coffee at Nylon Coffee Roasters on Everton Park in Singapore.

I'm having black coffee, he's using a cappuccino. They're handsome.
Brown hair slicked back, glasses for his face, hazel eyes and the most beautiful lips I've seen.
He's nice, with incredible arms plus a chest that shines during this sweater.

We're standing before of each other talking about our lives, what you want into the future, what
we're searching for on another person. He starts telling me that bigger been rejected a great deal of times.


‘Why Andrew? You're so handsome. I'd never reject you ',
I have faith that He smiles at me, biting his lip.


‘Oh, I would not know. Everything happens for grounds right.
But figure out, would you reject me, does one Ana?' He said.


‘No, how could I?' , I replied

"So, you wouldn't mind if I kissed you currently?' he stated as I purchase far better him and kiss him.

‘The very next time don't ask, do it.' I reply.

‘I favor how we think.' , he said.

Meanwhile, I start scrubbing my hindfoot in his leg, massaging it slowly. ‘So what can you prefer girls? And, Andrew, don't spare me the details.' I ask.

‘Everyone loves determined women. Someone discussion what you want. Somebody who won't say yes even though I said yes. Someone who's not afraid when you try a new challenge,' he says. ‘I'm never afraid when you attempt something mroe challenging, especially in regards to making something mroe challenging in the bedroom ', I intimate ‘And I enjoy women who are direct, who cut in the chase, like you only did. To become
honest, that is a huge turn on.
נערות ליווי دوشنبه 3 تیر 1398 09:03 ب.ظ
"We will need to build to another crescendo, cheri," he said.
"And then we are going to have an ending that is to be as none before."

His smile was decadent, his eyes were filled up with lust,
along with the soft skin of his hard cock against my
sex was having its intended effect. I'm feeling a stronger arousal now
as I felt his cock slide between my sensitive lips.
I felt the top of his cock push agonizingly at the entrance of my
pussy, and Needed him to thrust into me hard. Instead
he pulled back and slid his hardness back
as much as my clit.

I became aching to have him inside, and I really could tell that
his need to push that wonderful hard cock inside me was growing.
His moans grew to fit mine, and I knew the sense of my wet pussy lips
on the head of his cock was getting a lot for of us.

"Permit the finale begin," he said, anf the husband slid the
end of his cock inside me.

Both of us gasped while he held his cock there for just a moment.

I contracted my pussy to get him further inside, and hubby
threw his head back on the sensation. Inch by excruciating inch he pushed
his cock inside me, every time I squeezed my pussy around him.
His cock felt wonderful because it filled me, but I wanted
all of it inside me. I rolled aside and rested my leg against his shoulder, and that he
plunged his cock all the way up in.
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"And we all are going to have an ending that will be as none before."

His smile was decadent, his eyes were full of lust,
as well as the soft skin of his hard cock against my sex was having its intended effect.
I'd been feeling a stronger arousal now as I felt his
cock slide between my sensitive lips. I felt your head of his cock
push agonizingly at the doorway of my pussy, and I want
to him to thrust into me hard. Instead he retracted and
slid his hardness back about my clit.

I became aching to possess him inside, and I can tell that his really
need to push that wonderful hard cock inside me was growing.

His moans grew to check mine, and I knew the sensation of my wet pussy lips about the head of his cock was
getting a lot both for of us.

"Permit finale begin," he explained, and that he slid the end of his cock
inside me.

Both of us gasped because he held his cock there to get a moment.
I contracted my pussy to get him further inside, and
the man threw his return within the sensation. Inch by excruciating inch he pushed his cock inside me, and each time I squeezed my pussy around him.
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