系統支撐架在不同斜撐方式下的承載能力研究

The Study of Load-Carrying Capacity of System Scaffolds for Different Bracing Conditions

黃宣瑋(Hsuan-wei Huang)

指導教授 ： 潘吉齡

朝陽科技大學/理工學院/營建工程系/碩士(2012年)

摘要

本研究針對系統支撐架在不同的斜撐方式下承載能力進行試驗與分析
，試體分別為無斜撐方式及其他4種斜撐方式的搭設進行，並在實驗所使用的各種桿件進行接合及材料性質試驗，將所得參數加入分析探討與實驗結果進行比較。
而根據實驗結果，討論極限承載力(Pu)、極限挫屈強度(Pcr)、極限挫屈應變(εcr)和破壞的型式。實驗結果發現四種斜撐在相同的試驗條件下有所差異，極限承載力為斜撐方式(四)最高，次之斜撐方式(三)，兩者極限承載力較為接近。在分析結果(頂部自由移動、側向力加載於頂部)中發現斜撐方式(四)的極限承載力較其他斜撐方式高；分析結果(頂部X方向及Y方向固定、側向力加載於分層中央)中發現斜撐方式(三)的極限承載力較其他斜撐方式高。對於系統支撐架在不同斜撐方式下的承載能力研究中發現，在系統支撐架組搭之實際運用，斜撐方式建議採用斜撐方式(三)及斜撐方式(四)的組搭方式較佳。

關鍵字

系統支撐架 ； 極限承載力 ； 斜撐

並列摘要

This research is concentrated on the study of loading capacity of scafford with different types of bracing. The scraffords without bracing and with four kinds of bracing are inculded in the test program. In addition, the material test and member test were conducted in this study, in order to obtain the material proporties and connection parameters in the utilization of analysis software for the cpmparison purpose.

The discussion was made for the ultimate load, critical buckling load, critical buckling strain, and failure mode for all specimens based on the test results. It was observed that the specimens with the No. 4 type of bracing and the No. 3 type of bracing have the highest and second highest value of ultimate load, respectively, and these two types scaffolds have similar values of ultimate loads. In the analysis, it was found that the scaffold with the No. 4 type of bracing has highest ultimate strength as the notional horizontal force applied on the top of scaffold, as well as the No. 3 type of bracing has highest ultimate strength as the notional horizontal force applied on the middle of scaffold. Based on the test and analysis results, using either the No. 4 type of bracing or the No. 3 type of bracing to assemble the scaffold are suggested for the practice purpose.

並列關鍵字

system scaffolds ； ultimate load ； bracing

參考文獻

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