偏心載重作用下螺栓群強度之改良分析

The Improved Strength Analysis for Eccentrically Loaded Bolt Groups

郭宗儒(Zong-Ru Guo)

指導教授 ： 徐暐亭

朝陽科技大學/理工學院/營建工程系/碩士(2014年)

摘要

研究螺栓承受偏心載重的相關文獻在目前數量非常有限，強度分析方法分為彈性與極限方法，彈性方法簡單但是較為不經濟，而極限方法採用反覆運算的非線性分析，AISC設計規範採用極限設計法為依據，但計算複雜使用不易，因此規範也僅給予特定斷面查表法。本研究是以Crawford S.F.與Kulak G.L.研究出的極限瞬時中心分析法為出發點，蒐集其後學者所研究出的各種方法做比較其差異性、複雜度。Iwankiw之近似公式提出從0~90度簡易的計算出C值，而分段Iwankiw修正法則以0、15、30、45、60、75為初始點計算出其餘角度之C值，本研究由此提出修正Iwankiw的函數次方之方法，此方法改善了Iwankiw之近似公式與極限分析的低估誤差，也改善了分段Iwankiw修正法與極限分析須查表(6個)及在大角度時的誤差。本研究簡化現有螺栓承受偏心載重之極限分析法，取代繁雜的分析，且提供一個不必大量查表，全角度可簡易使用之公式，使業界以及使用者節省複雜的計算過程，所有螺栓斷面承受扭剪接合皆可使用此分析方法。

關鍵字

AISC規範 ； 極限設計 ； 偏心載重 ； 螺栓強度 ； 螺栓群

並列摘要

Research on bolt under eccentric load in the current literature related to a very limited number, strength analysis method is divided into elastic and elastic limit method, method is simple but is not the economy, and the analysis of nonlinear iteration by limit method, AISC design specifications using limit design method as the basis, but the computational complexity is not easy, so the specification can only give a specific section of the look-up table method. This study is based on Crawford and Kulak to study the limit of instantaneous center analysis as a starting point, to collect all kinds of methods of subsequent scholars developed to compare their differences, complexity. Iwankiw approximate formula is proposed to calculate 0~90 value from the C is simple, and the segmented Iwankiw updating rule to calculate the angle of C from 0, 15, 30, 45, 60, 75 for the initial value, this study proposed a modified Iwankiw function method, this method improves the Iwankiw approximation underestimate the error analysis and limit, also improved piecewise Iwankiw repair method and limit analysis must look up table (6) and the error in the angle of the. In this study, simplify the existing bolt analysis eccentric load bearing limit, complex analysis is replaced, and provide a without a lot of look-up table, the angle can be a simple formula for use, so that the industry and users save the complex computing process, all bolt section under torsional shear bonding can use this analysis method.

並列關鍵字

AISC specification ； Ultimate Design ； Eccentrically Load ； Bolt Strength ； Bolted Group

參考文獻

8. 楊國珍、許瓊芳、許睿佳，「高溫下螺栓接合之受力行為研究」，中國土木水利工程學刊，第二十四卷，第四期，第405-414頁，2012。

4. American Institute of Steel Construction (1989), Inc., Manual of Steel Construction, Allowable Steel Design, Ninth Edition, AISC, Chicago, Illinois.

5. American Institute of Steel Construction (1999), Inc., Manual of Steel Construction, Load and Resistance Factor Design Specification for Structural Steel Buildings, AISC, Chicago, Illinois.

6. American Institute of Steel Construction (2010), Inc., Manual of Steel Construction, Specification for Structural Steel Buildings, Fourteenth Edition, AISC, Chicago, Illinois.

10. Su, R.K.L., and Siu, W.H., “Nonlinear response of bolt groups under in-plane loading,” Engineering Structures Vol. 29, pp. 626-634, 2007.