輕型鋼管結構簡易接頭之受力行為與強度

The Strength of A New Type Connection for Rectangular Steel Tube Structures

陳正誠(Cheng-Cheng Chen) ； 林曉芳(Xiao-Fang Lin)

《結構工程》 34卷2期 (2019/12) Pp. 5-22

https://doi.org/10.6849/SE.201912_34(2).0001

摘要

近年來臺灣因為少子化的問題，勞動市場逐漸邁向高齡化，勞力的缺乏以及營造業基層勞動人力招募不易等因素，使得需要高勞力的鋼筋混凝土構造建造成本持續提升。使用輕型鋼管結構配合新型式簡易接頭的施工方法，是一個可以有效降低勞力需求及建造時間的結構形式。但目前對於簡易接頭之強度以及與簡易接頭連接之銲道的強度，沒有相關研究結果可供參考。有鑑於此，本文採用結構試驗之方式，探討簡易接頭受力行為，建立接頭強度評估方法。每一個簡易接頭是由兩個形狀構造相同的接頭元件，配合兩顆高強度螺栓組合而成。簡易接頭有用於梁端接頭（簡稱BJ）及用於柱端接頭（簡稱CJ）兩種型式，目前適合使用於斷面100 × 100 mm之方管及200 × 100 mm之矩形管。經過一系列共51個試體之載重試驗，配合規範相關強度評估公式，得到主要結果如下：（1）與200 × 100 mm矩形管連接之BJ接頭，其正向剪力設計強度可達22.5 tf，負向剪力設計強度可達12.3 tf；（2）與100 × 100 mm方管連接之BJ接頭，其正向剪力設計強度可達10.7 tf，負向剪力設計強度可達9.98 tf；（3）與200 × 100 mm矩形管連接之CJ接頭，其拉力設計強度可達13.8 tf，壓力設計強度可達61.4 tf；（4）與100 × 100 mm方管連接之CJ接頭，其拉力設計強度可達13.8 tf；壓力設計強度可達37.0 tf。

關鍵字

鋼管結構接頭 ； 簡易接頭

並列摘要

In order to improve construction efficiency of low-rise buildings, a new type of connection for steel tube structures was developed.The new type connection for horizontal and vertical members are designated as BJ and CJ connections, respectively. Each of the new type connection is composed of two identical parts and assembled by two high strength bolts. The strength of this new type connection and the strength of the welds connecting the connection and steel tube were experimentally studied. A total of 51 successful tests were carried out and the following conclusions then are made accordinly: (1) The welds connecting the new type connection and the steel tube possess enough strength to transfer member forces from tubes to the connection. Therefore, it is suggested that the type and size of welds used in the test specimen should be used in the real structures. (2) The design shear strengths for BJ connection are proposed. (3) The design tensile strength and design compressive strength for CJ connection are also proposed.

並列關鍵字

steel tube structure ； steel tube construction