【摘要】 目的为应用离散单元法进行钢筋混凝土梁柱构件在一般荷载作用下的非线性反应分析,对杆段多弹簧模型进行改进.方法通过引入剪切弹簧,来传递单元之间的剪切力,剪切弹簧的本构关系采用二线型原点指向模型.并推导出弹簧组的力-位移关系与单元的运动方程.结果建立了完整的杆段多弹簧模型,并给出了剪切弹簧计算参数的确定方法.结论改进后的杆段多弹簧模型能够较好地描述钢筋混凝土梁柱构件压弯耦合以及剪切非线性性能.更多还原

【Abstract】 In this paper,the segment-multi-spring model(SMSM)is improved so as to apply the distinct element method(DEM)to the nonlinear analysis of RC beams and columns under common load.The shearing force between the elements is transferred by introducing shear spring.The bilinear origin-oriented model is employed for the hysteresis model of the shearing spring.The force-displacement relationship of spring groups as well as the motion equation of elements is derived.A comprehensive SMSM is established and the analytic parameters of the shear spring are also determined.The improved SMSM can correctly simulate the axial-bending coupling performance as well as the shear nonlinear performance.更多还原