دانلود رایگان مقاله لاتین ارزیابی قوانین ec2 برای طراحی اتصال فشرده سازی از سایت الزویر
عنوان فارسی مقاله:
ارزیابی قوانین EC2 برای طراحی اتصالات فشرده سازی اتصال لبه روی لبه
عنوان انگلیسی مقاله:
An evaluation of EC2 rules for design of compression lap joints
سال انتشار : 2016
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مقدمه انگلیسی مقاله:
1. Introduction
The adequacy of EC2 [1] rules for the design of tension lapped joints has recently been questioned by Cairns and Eligehausen [2]. This paper reports an equivalent analysis of EC2 design rules for lapped joints of compression bars. There is relatively little test data for compression laps compared to that for laps of bars in tension. Up until 2010 less than 50 tests on compression lapped joints were reported in the literature, all undertaken before 1975, when strengths of both concrete and reinforcement were below those currently in use. The database of tension lap tests compiled by fib [3] and which extended the ACI 408 [4] database contains nearly 20 times this number of results. Since 2010 Chun and co-workers [5,6,7] have conducted over 100 further tests on compression laps, and this provides an opportunity to re-evaluate the current design rules in EC2 to complement a recently completed review of tension laps [2]. The relative scarcity of test data on compression laps is probably attributable to the greater demands on testing capacity rather than to any lack of importance in construction. The capacity of the testing equipment required for compression laps is around 10 times greater than that for tension laps, greater accuracy is required when setting up test specimens, and interpretation of results is more difficult. Such difficulties are not valid reasons to neglect compression laps, however. While it is often possible to locate tension laps away from points of maximum stress in reinforcement, compression laps commonly have to be located where stress in reinforcement is at its highest. The aim of this paper is to assess whether EC2 rules provide the expected margin of safety against failure of compression lapped joints.
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کلمات کلیدی:
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