ASTM A370 鋼筋的拉伸測試與彎曲測試
此裝載框架安裝了一個底部有裝載面積的上置液壓促動器,這大大降低了我們必須將重型鋼筋試片抬起裝載的要求,另外,因為增加了壓縮轉接器到拉伸夾置具上,我們便可以進行鋼筋試片的拉伸和抗彎測試,節省了不少轉換的時間,因為我們不需要使用起重機去移動又大又重的拉伸夾置具,增加此壓縮轉接頭和抗彎夾置具只需要幾分鐘的時間且簡單鎖緊幾個螺絲。
為了此拉伸測試我們使用了油壓式楔型夾置具,因為初始的鎖模力可以減少夾置具在鋼筋粗糙表面的滑移現象,此 油壓式楔型夾置具可以夾持鋼筋直徑尺寸為10 mm (0.39 in)至70 mm (2.75 in),夾置具為有一個可以容納鋼筋橫樑凹槽的V型夾置具。
最後我們使用一個自動的應變計來量取應變值,我們所選擇的型號為M300B,其可調整的標距長度為10 mm至300 mm(此要求為大多數的鋼筋所應用),在測試開始時可以自動的夾住鋼筋的橫樑表面且在測試期間在特定的點鬆開,此應變數據可以用在彈性模數和降伏強度的計算。
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