钢筋混凝土梁正截面受弯性能实验报告.doc

_钢筋混凝土梁正截面受弯性能实验报告1、 实验记录结果表 应变与挠度记录表测点荷 载钢筋应变混凝土应变挠 度mm荷载级数荷载值12123412345KN预载0-1101000.0030000.00341313216-3-120.0030.1770.007-0.230.0178 41416419-8-32-0.060.3630.007-0.06012988314146-10-59-0.1530.5570.0070.10.017标准加载1412910719065-9-72-0.1970.680.0070.20.0131616213022489-5-83-0.2370.80.0070.310.02318195156289116-3-98-0.2530.920.0070.4270.023202321833511442-112-0.2731.040.0130.5270.023222702144171799-127-0.2831.1630.0130.7670.0172431124549722419-147-0.311.30.090.7870.022634927557026330-155-0.3331.4370.2170.9730.0232838630564330037-169-0.361.5570.341.0270.0173245036876936151-198-0.381.820.5831.270.0173448740183839556-215-0.371.940.7271.407-0.007破坏加载3855247596445968-245-0.382.2171.0431.68-0.01342618540107852480-275-0.3832.5471.3271.937-0.0146685584120861096-306-0.382.7831.6372.237-0.007507506551386687115-335-0.383.3931.9432.543-0.007548177141510776139-367-0.383.4032.2732.880588867831645853153-405-0.384.22.743.413-0.003629498641781928164-439-0.394.7573.423.973-0.0036610119141895991172-475-0.3979.3733.9134.503-0.003701180248721131133273-500-0.4037.0574.515.230.0032、 实验现象描述及裂缝分布图如图，随着荷载的逐渐增大，梁逐渐出现裂缝并变大，且裂缝成斜向分布。当最终梁被破坏是，斜裂缝贯穿整个梁。3、 荷载挠度曲线、荷载应变曲线1、钢筋荷载应变曲线图2、 混凝土荷载应变曲线图3、 梁荷载挠度曲线图四、实验值与理论值对比分析钢筋混凝土梁在荷载为66KN的时候遭到破坏，为破坏荷载。受力截面积S=2*0.12=0.24平米破坏强度=66000/0.24=275MP 与理论值相差不多，所以为合格梁但