本文選題：海水噴淋干濕循環(huán)　切入點(diǎn)：持續(xù)荷載　出處：《北京工業(yè)大學(xué)學(xué)報(bào)》2017年12期

【摘要】：為了解決沿海地區(qū)正常使用工作狀態(tài)下承受較大持續(xù)荷載鋼筋混凝土(reinforced concrete,RC)梁的力學(xué)性能劣化問題,通過實(shí)驗(yàn)室模擬經(jīng)歷180 d大氣環(huán)境+180 d海水噴淋干濕循環(huán)(簡(jiǎn)稱Ⅰ腐蝕)或180 d海水噴淋干濕循環(huán)+180 d大氣環(huán)境(簡(jiǎn)稱Ⅱ腐蝕)后,由靜力加載試驗(yàn)測(cè)試RC梁試件力學(xué)性能劣化規(guī)律.試驗(yàn)結(jié)果,RC梁試件在不同持續(xù)荷載和一定腐蝕環(huán)境共同作用下,隨著持續(xù)荷載增大其屈服荷載P_y、極限荷載P_m和延性系數(shù)u降幅變大.Ⅱ腐蝕梁試件的P_y、P_m和u降幅大于Ⅰ腐蝕梁試件的P_y、P_m和u降幅.梁試件的抗彎剛度隨著持續(xù)荷載增大而降低.試驗(yàn)結(jié)果表明較大持續(xù)荷載與一定腐蝕環(huán)境共同作用對(duì)RC梁力學(xué)性能劣化影響明顯.
[Abstract]:In order to solve the problem of deterioration of mechanical properties of reinforced concrete reinforced concrete reinforced concrete (RC) beams under normal working conditions in coastal areas, After 180 d atmospheric environment 180 d seawater spray dry and wet cycle (I corrosion) or 180 d seawater spray dry wet cycle 180 d atmospheric environment (II corrosion for short) were simulated in laboratory. The degradation rule of mechanical properties of RC beam specimens was tested by static loading test. With the increase of yield load, the decrease of ultimate load Pm and ductility coefficient u becomes larger. 鈪，

本文編號(hào)：1691794