混凝土
混凝土
혼응토
CONCRETE
2014年
11期
148-152,156
,共6页
自密实混凝土%简支梁%受弯性能
自密實混凝土%簡支樑%受彎性能
자밀실혼응토%간지량%수만성능
self-compacting concrete%simply supported beam%flexural property
为研究乌鲁木齐地区C30自密实混凝土简支梁受弯性能，以配筋率为变量，采用乌鲁木齐地区常用原材料分别制作5根C30自密实混凝土简支梁和3根C30普通混凝土简支梁，对其进行受弯性能测试。验证构件的平截面假定，对其荷载—挠度曲线、开裂弯矩、极限压应变、刚度和正截面承载力进行了对比分析。试验结果表明：自密实混凝土梁和普通混凝土梁均满足平截面假定；自密实混凝土和普通混凝土的计算开裂荷载均大于试验开裂荷载；随着荷载的增大，受弯混凝土构件抗弯刚度逐渐减小，其刚度前期衰减较快，后期衰减较慢；自密实混凝土和普通混凝土的极限荷载计算值低于极限荷载试验值。
為研究烏魯木齊地區C30自密實混凝土簡支樑受彎性能，以配觔率為變量，採用烏魯木齊地區常用原材料分彆製作5根C30自密實混凝土簡支樑和3根C30普通混凝土簡支樑，對其進行受彎性能測試。驗證構件的平截麵假定，對其荷載—撓度麯線、開裂彎矩、極限壓應變、剛度和正截麵承載力進行瞭對比分析。試驗結果錶明：自密實混凝土樑和普通混凝土樑均滿足平截麵假定；自密實混凝土和普通混凝土的計算開裂荷載均大于試驗開裂荷載；隨著荷載的增大，受彎混凝土構件抗彎剛度逐漸減小，其剛度前期衰減較快，後期衰減較慢；自密實混凝土和普通混凝土的極限荷載計算值低于極限荷載試驗值。
위연구오로목제지구C30자밀실혼응토간지량수만성능，이배근솔위변량，채용오로목제지구상용원재료분별제작5근C30자밀실혼응토간지량화3근C30보통혼응토간지량，대기진행수만성능측시。험증구건적평절면가정，대기하재—뇨도곡선、개렬만구、겁한압응변、강도화정절면승재력진행료대비분석。시험결과표명：자밀실혼응토량화보통혼응토량균만족평절면가정；자밀실혼응토화보통혼응토적계산개렬하재균대우시험개렬하재；수착하재적증대，수만혼응토구건항만강도축점감소，기강도전기쇠감교쾌，후기쇠감교만；자밀실혼응토화보통혼응토적겁한하재계산치저우겁한하재시험치。
To study the flexural performance of C30 self-compacting concrete simply supported beam in Urumqi area ,the ratio of rein-forcement as variables,respectively,making 5 C30 self compacting concrete beams and 3 C30 ordinary concrete beams in Urumqi area were used raw materials,testing the flexural performance.Verify the flat section assumption,the load deflection curve,cracking moment,ulti-mate compressive strain,stiffness and normal section bearing capacity were analyzed.The test results showed that self-compacting concrete and ordinary concrete beams were all meet the plane section assumption;calculation cracking load of self compacting concrete and ordinary concrete were greater than that of test cracking load;as the load increases,the flexural stiffness of the concrete members decreased,the early stage of the stiffness attenuate fast,the later stage of the stiffness attenuate slowly;calculated value of the ultimate load was less than test value.
