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单层单跨组合梁钢框架刚度的分析

Stiffness analysis of single-bay-span steel frames with steel-concrete composite beams

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【作者】 王力王誉瑾霍越群

【Author】 WANG Li, WANG Yu-jin, HUO Yue-qun(School of Civil Engineering, Harbin Institute of Technology, Harbin 150090,China)

【机构】 哈尔滨工业大学土木工程学院

【摘要】 为研究竖向荷载作用下单层单跨组合梁钢框架的刚度,将组合梁钢框架中的梁简化为阶梯形变截面梁,进行参数确定;应用试验值验证ANSYS有限元程序分析组合梁钢框架的可行性,利用此程序进行组合梁钢框架的非线性分析,确定了组合梁钢框架在竖向荷载作用下的负弯矩区长度参数,从而建立了该组合梁刚度计算模型.采用等效原理,确定出竖向荷载作用下单层单跨组合梁钢框架的等效刚度计算公式,给出工程设计时刚度取值的建议,并与有限元分析结果进行了对比.结果表明:理论分析和推导与ANSYS有限元分析结果吻合很好.

【Abstract】 To study the stiffness of single-bay-span steel frames with steel-concrete composite beams under vertical loads,parameters of the steel-concrete composite beam in steel frames were determined by simplifying the beam as the variable cross-section ladder-type one.The feasibility of analyzing steel-concrete composite beams of steel frames by using the finite element analysis program ANSYS was validated by test data.Through the nonlinear analysis of steel frames with steel-concrete composite beams,the length parameters of negative moment district under vertical load were obtained, and a calculation model for stiffness analysis was established.According to the equivalent principle,the stiffness of steel-concrete composite beams in steel frames was analyzed.The equivalent stiffness formula of steel-concrete composite beams in steel frames under vertical loads was derived on the basis of dominant cross-section deflection equality principle. By comparing with the results of the proposed calculation model with those of the finite element analysis in ANSYS,it is shown that there is a good agreement between them,which verifies the correctness of the proposed model.

【基金】 国家自然科学基金资助项目(50378030);黑龙江省科技攻关项目(GC07A601);黑龙江省博士后科研启动金资助项目(LHK-04072)
  • 【文献出处】 哈尔滨工业大学学报 ,Journal of Harbin Institute of Technology , 编辑部邮箱 ,2008年10期
  • 【分类号】TU391
  • 【被引频次】3
  • 【下载频次】183
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