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利用ANSYS对75组两边连接竖向加劲钢板剪力墙进行单向静力推覆分析,在得到相应的荷载-位移曲线之后确定出各自的初始刚度、屈服荷载和极限荷载三个力学性能指标,验证了利用幂函数中的Langmuir EXT1模型可以对有限元荷载-位移曲线有比较好的拟合效果。对跨高比0.5~1.5之间的拟合结果再次进行回归分析得到幂函数中参数的表达式,并将通过回归公式计算的结果与有限元结果进行对比,发现公式得出的初始刚度、屈服荷载偏于保守和安全,极限荷载的规律可能对于工程实际计算会不利。研究证明采用幂函数中的Langmuir EXT1函数表达式来拟合钢板的荷载-位移曲线是可行的。
ANSYS was used to carry out one-way static pushover analysis of 75 groups of vertical stiffened steel plate shear walls with two sides connected to each other. After the corresponding load-displacement curves were obtained, the three initial mechanical properties of initial stiffness, yield load and ultimate load were determined. It is verified that the Langmuir EXT1 model in power function can fit the load-displacement curve of the finite element well. Regression analysis of the fitting results of the cross-height ratio of 0.5 to 1.5 was conducted to obtain the expression of the parameters in the power function. The results calculated by the regression formula were compared with those of the finite element method. The initial stiffness obtained by the formula was found to yield The load is conservative and safe, and the law of ultimate load may be detrimental to the actual calculation of the project. The research proves that it is feasible to fit the load-displacement curve of steel plate by Langmuir EXT1 function expression in power function.