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پیچ سازان نام آور - معرفی انواع بولتها بر اساس مبحث دهم مقرارت ملی ساختمان
 
از اولین ها نیستیم ولی به لطف الهی از بهترین ها هستیم

معرفی انواع بولتها بر اساس مبحث دهم مقرارت ملی ساختمان

نوشته شده توسط :علی فتحی
چهارشنبه 20 آبان 1394-ساعت 19 و 23 دقیقه و 34 ثانیه

                                                                                              
                                            پیج سازان نام آور

معرفی انواع پیچ­ ها (براساس مبحث دهم مقررات ملی ساختمان :طرح واجرای ساختمانهای فولادی):

انواع متداول پیچ های مورد استفاده در اسکلت های فولادی عبارتند از پیچ های معمولی و پیچ های پر مقاومت. در جدول 6-9-2-10 مشخصات پیچ های موجود یا تولید در ایران طبق استانداردهای   ASTM –ISO  ارائه شده است.

برای هر پیچ باید واشر ومهره  سازگار مورد استفاده قرار گیرد.

پیچ ها بادو نوع عملکرد اتکایی و اصطکاکی مورد استفاده قرار می گیرد. استفاده از پیچ های پر مقاومت منطبق با استاندارد های ملی یا بین المللی برای هر دو نوع اتصال و استفاده از پیچ های معمولی فقط  در اتصالات اتکایی مجاز است.در اتصالات اتکایی ایجاد نیروی پیش تنیدگی لازم نیست  ولی دراتصالات اصطکاکی پیچ ها باید پیش تنیده گردند. حداقل نیروی پیش تنیدگی در اتصالات اصطکاکی مطابق مقادیر جدول  10-2-9-7 میباشد برای حصول پیش تنیدگی استفاده از یکی از سه روش (سفت کردن مجدد مهره)

(واشرهای کشش سنج) یا (آچار مدرج) امکان پذیر است.





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