HTRB600級(jí)高強(qiáng)鋼筋高溫下的力學(xué)性能
發(fā)布時(shí)間:2018-07-21 22:11
【摘要】:為研究600 MPa級(jí)高強(qiáng)鋼筋高溫下的力學(xué)性能,對(duì)HTRB600級(jí)熱處理高強(qiáng)鋼筋進(jìn)行高溫下的拉伸試驗(yàn),分別測(cè)得其在20,200,300,400,500,600,700及800℃高溫下的彈性模量、比例極限、屈服強(qiáng)度、極限強(qiáng)度及應(yīng)力-應(yīng)變曲線.試驗(yàn)結(jié)果表明:HTRB600級(jí)高強(qiáng)鋼筋高溫下屈服強(qiáng)度、極限強(qiáng)度、比例極限與彈性模量均隨著溫度的升高而顯著降低.500℃時(shí)其高溫下的彈性模量、比例極限、屈服強(qiáng)度與極限強(qiáng)度降低為不足常溫下的50%,800℃時(shí)已不足常溫下的10%.高溫下HTRB600級(jí)高強(qiáng)鋼筋應(yīng)力-應(yīng)變曲線隨溫度的升高逐漸趨于圓滑,當(dāng)溫度達(dá)到200℃時(shí),屈服臺(tái)階就已消失.600 MPa級(jí)鋼筋高溫下屈服強(qiáng)度和極限強(qiáng)度的降低程度明顯大于其他鋼筋500 MPa以下強(qiáng)度的鋼筋.最后提出了適用于HTRB600級(jí)高強(qiáng)鋼筋的高溫下應(yīng)力-應(yīng)變曲線簡(jiǎn)化計(jì)算模型.
[Abstract]:In order to study the mechanical properties of 600 MPA high strength steel bar at high temperature, the tensile test of HTRB600 grade heat treated high strength steel bar at high temperature was carried out. The elastic modulus, proportional limit and yield strength of HTRB600 high strength steel bar at 20200300400500600700 and 800 鈩,
本文編號(hào):2137018
[Abstract]:In order to study the mechanical properties of 600 MPA high strength steel bar at high temperature, the tensile test of HTRB600 grade heat treated high strength steel bar at high temperature was carried out. The elastic modulus, proportional limit and yield strength of HTRB600 high strength steel bar at 20200300400500600700 and 800 鈩,
本文編號(hào):2137018
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