مهندسی سازه و ساخت

مهندسی سازه و ساخت

ارائه روشی جدید جهت ساخت پل‌های کابلی بدون نیاز به تنظیم نهایی کشش کابل‌ها

نوع مقاله : علمی - پژوهشی

نویسندگان
1 دانشجوی دکتری، گروه مهندسی عمران، دانشکده فنی و مهندسی، دانشگاه قم، قم، ایران
2 دانشیار، گروه مهندسی عمران، دانشکده فنی و مهندسی، دانشگاه قم، قم، ایران
چکیده
کابل‌ها یکی از اساسی‌ترین اجزای پل‌های کابل‌ایستا در تامین ایمنی و شرایط بهینه‌ طراحی می‌باشند. روش‌های مختلفی برای تنظیم نیروی کشش کابل‌ها جهت دستیابی به شرایط بهینه نیروهای طراحی کابل ها و سایر اجزای پل ارائه شده است. همچنین روش‌های متفاوتی تحت عنوان روش‌های تحلیل حین ساخت همانند روش روبه جلو و رو به عقب ارائه شده‌اند تا از دستیابی به نیروهای طراحی کابل‌ها در زمان ساخت اطمینان حاصل شود. اکثر روش‌های ساخت ارائه شده پل‌های کابلی نیازمند تنظیم چند باره کشش کابل‌ها در هر مرحله ساخت بوده و با توجه به خطاهای اجرایی منجر به عدم تطابق شکل هندسی نهایی پل با مشخصات مورد انتظار می‌گردد. در این پژوهش با بررسی تأثیر تغییرات کشش اولیه کابل‌ها نسبت به فرضیات طراحی بر سختی، مقاومت و ایمنی کلی پل، روش جدیدی جهت ساخت پل‌های کابلی بدون نیاز به تنظیم مجدد کشش‌ کابل‌ها ارائه شده است. به همین منظور در یک مطالعه‌ی موردی، یک پل کابل ایستا سه دهانه تهیه و تحت اثر تحلیل غیرخطی استاتیکی قرار گرفته و روش پیشنهادی ارائه شده جهت ساخت پل‌های کابل‌ایستا بر روی آن مورد بررسی قرار گرفته است. روش پیشنهادی یک رویکرد ساده تر و کارآمدتر برای ساخت پل های کابلی بدون به خطر انداختن ایمنی و دوام سازه می‌باشد
کلیدواژه‌ها

موضوعات


عنوان مقاله English

Introducing a New Method for Construction of Cable-Stayed Bridges without the Need for Final Adjustment of Cable Tension

نویسندگان English

Hamidreza Dehghani 1
Ehsan Dehghani 2
1 Ph.D. candidate, Faculty of Engineering, University of Qom, Qom, Iran
2 Associate professor, Faculty of Engineering, University of Qom, Qom, Iran
چکیده English

Cables are essential components of cable stayed bridges, contributing to their safety and optimal design conditions. Various methods have been proposed to adjust cable tension in order to achieve optimal design forces for cables and other bridge components. Different construction analysis methods, such as forward and backward analysis, have also been introduced to ensure the attainment of cable design forces during construction. Most of the existing construction methods for cable-stayed bridges require multiple adjustments of cable tension at each construction stage, which often result in deviations from the desired geometric shape of the final bridge due to execution errors. In this research, a new method is presented for constructing cable stayed bridges without the need for readjustment of cable tension, by investigating the impact of initial cable tension variations on the overall stiffness, resistance, and safety of the bridge, and proposing an alternative approach. To validate this approach, a three-span cable-stayed bridge is investigated as a case study using nonlinear static analysis. and the proposed method for constructing cable-stayed bridges was evaluated on this particular bridge. The proposed method offers a simpler and more efficient approach to constructing cable stayed bridges without compromising the safety and durability of the structure.

کلیدواژه‌ها English

Cable-stayed bridges
Cable tension adjustment
Construction method of cable-stayed bridges
Construction stage analysis
shakedown limit load
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  • تاریخ دریافت 24 تیر 1402
  • تاریخ بازنگری 07 بهمن 1402
  • تاریخ پذیرش 24 اسفند 1402