【作者】 王成刚； 黄浩； 柳炳康； 肖景平；

【Author】 Wang Chenggang;Huang Hao;Liu Bingkang;Xiao Jingping;School of Civil Engineering,Hefei University of Technology;Huahui Engineering Design Group Co.,Ltd.;

【机构】 合肥工业大学土木与水利工程学院； 华汇工程设计集团股份有限公司；

【摘要】 我国规范对梁腹洞口开设位置、尺寸大小都有明确限定,仅给出符合此规定的配筋设计方法。对于超出此限定的没有提供具体的设计方法,而在洞口边仅配置一些构造钢筋,没有定量的计算方法。采用拉压杆模型法,对一不规则开洞的简支深梁进行配筋设计,并能实现洞口边所需钢筋的定量计算。而后利用ANSYS有限元软件对此深梁进行非线性有限元分析,研究表明,拉压杆模型法所采用的两种模型与此深梁的荷载传力路径十分吻合,理论计算承载力较设计值大,可见按拉压杆模型方法设计不规则开洞深梁是合理有效的。更多还原

【Abstract】 In current Chinese code,the definite limits are always offered for the openings’ position and dimension,and only the reinforcement design method is put forward according to these limits.But the specific design is not offered for the condition that the opening and dimension goes beyond the limits.The code of concrete structure just provide that some constructional steel bars should be placed around the opening,which cannot be aquired in accordance with a quantitative calculation method.The Strut-and-Tie model method will be applied to design the deep beams with a large opening which does not conform to the code,and get an quantitative result of steel bars needed.According to the results of the nonlinear finite element analysis with ANSYS,it is apparent that the two models which is applied by the Strut-and-Tie model method are identical with the load path in the deep beams;and the ultimate load obtained from ANSYS is larger than the design load.It can be concluded that the Strut-and-Tie model method is reasonable and effective to be used for the design of the deep beams with abnormal opening.更多还原