نتایج جستجو برای: concrete beam and girder
تعداد نتایج: 16877190 فیلتر نتایج به سال:
in this paper, the mechanical behavior of three-phase inhomogeneous materials is modeled using the meso-scale model with lattice beams for static and dynamic analyses. the timoshenko beam theory is applied instead of the classical euler-bernoulli beam theory and the mechanical properties of lattice beam connection are derived based on the continuum medium using the non-local continuum theory. t...
The prestressed ducts of concrete continuous girder bridges are usually three-dimensionally distributed and long in length. control prestress loss during construction is very important. In order to ensure the effect tensioning, test analysis friction parameters particularly Based on tension process a beam bridge, initial stress, loading time channel bridge tested by field tests. Combined with m...
Synchrotron radiation facilities are very important in different areas of fundamental and applied science to investigate structures or processes at small scales. Magnet–girder assemblies play a key role for the performance such accelerator machines. High structural eigenfrequencies magnet–girder required assure sufficient particle beam stability. The objective present parametric study was numer...
Five methods are introduced for design of castellated I beams encased in concrete. One of the methods, plastic analysis, is thoroughly explained and the relevant equations are developed. Eight castellated I beams encased in concrete are made and tested. The theoretical design methods are all compared with the test results and the safety factor for each method is calculated. The results show tha...
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در این پایان نامه روش جدیدی مبتنی بر روش حل معادلات دیفرانسیل پارهای بر اساس روش توابع پایه برای حل مسایل ارتعاش اجباری واستاتیک تیرها و صفحات لایه ای ارایه شده است که می توان تفاوت این روش با روش های متداول توابع پایه را در استفاده از توابع هموار در ارضاء معادلات حاکم و شرایط مرزی دانست. در روش ارایه شده در این پایاننامه از معادله تعادل به عنوان معادله حاکم بر رفتار سیستم استفاده شده است که مو...
The contents of this report reflect the views of the authors who are responsible for the facts and the accuracy of the data presented herein. The contents do not necessarily reflect the official views or policies of the Federal Highway Administration or the Indiana Department of Transportation. This report does not constitute a standard, specification, or regulation. This report is the third of...
This paper has evaluated the bending performance of a novel prefabricated MVFT steel-concrete composite girder. 9 meters pilot girder was analyzed by validated finite element model. In test, height web, length grouted concrete in and net spacing between webs were parametrically modeled to discuss their effect strength. An ultimate strength formula been obtained, which based on regression parame...
The steel-concrete composite girder bridge with V-shaped piers is a new type of structure. It has both the unique mechanical performance combined continuous and that pier bridge. At present, studies on properties steel main girders concrete deck slabs are mainly focused substructure for vertical piers, but not solidified. However, if cemented to girder, will directly affect total superstructure...
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