轻钢-混凝土组合梁的试验研究及非线性有限元分析

Experimental study and nonlinear finite element analysis of lightweightsteel concrete composite beams

针对轻钢-混凝土组合梁这种新的结构形式,本文进行了六个试件的试验研究,分析了构件的破坏形式、荷载-位移曲线、荷载-应变曲线、钢材和混凝土的应变分布及板宽度方向应变分布等。通过试验研究,初步了解了轻钢-混凝土组合梁的特点和各种截面的粘结性能。采用组合梁单元模型,对轻钢-混凝土组合梁进行了非线性有限元分析,理论计算结果与试验结果吻合较好。

Six tests of lightweight steel concrete composite beams have been performed. The damage mode, load deflection relationship, load strain relationship and strain distribution of steel and concrete as well as strain distribution along slab width direction are analyzed. From the experimental studies the character of lightweight steel concrete composite beams and bonding behavior between the steel and concrete of beams with different cross sections are observed. Also, nonlinear finite element method is applied to calculate the load deflection relationship of lightweight steel concrete composite beams by using a double beam model. The calculated result has a good agreement with that of the test.