往复荷载下承插式管道接口弯曲力学性能试验研究  

Experimental study on the bending mechanical properties of plug⁃in pipeline interfaces under reciprocating loads

作　　者：赵优 朱德 任雪振 ZHAO You;ZHU De;REN Xuezhen(Jiaozuo Vocational College of Industry and Trade,Jiaozuo 454550,Henan,China;Zhongde Xinya Building Materials Co.,Ltd.,Xinmi 452300,Henan,China)

机构地区：[1]焦作工贸职业学院,河南焦作454550 [2]中德新亚建筑材料有限公司,河南新密452300

出　　处：《工程建设》2024年第12期24-28,34,共6页Engineering Construction

基　　金：国家自然科学基金资助项目(51078125,51578217)。

摘　　要：为分析往复加载方式下的不同加载速率对承插式柔性接口弯曲力学性能的影响规律,文章进行了DN200 mm和DN300 mm两种管径在弯曲作用下球墨铸铁管道承插式柔性接口逐级往复加载试验,对比不同管径和不同加载速率对接口处力学性能的影响。结果表明:管道柔性接口在不同加载速率逐级往复荷载作用下弯矩-接口转角曲线趋势相同,每个加载等级的滞回曲线重合性较好;管道直径的变化对接口极限转角大小影响较大,管径越大,接口胶圈直径增加,导致接口处的密封胶圈与外管壁接触面积增多,两种管径的横向极限转角位移基本稳定在4°~5°;得到两种管径每个加载等级第一次往复加载的滞回曲线面积,对比发现相同加载速率管径越大能量消耗越大,但加载等级在0~72 mm(0°~4°)内能量消耗无明显差别。To analyze the influence of different loading rates under reciprocating loading methods on the bending mechanical properties of the socket flexible interface,stepwise reciprocating loading tests were conducted on ductile iron pipes with DN200mm and DN300mm pipe diameters under bending.The effects of different pipe diameters and loading rates on the mechanical properties of the interface were compared.The experimental results show that the bending moment interface angle curve of the flexible pipeline interface has the same trend under different loading rates and step by step reciprocating loads,and the hysteresis curves of each loading level have good overlap;The variation of pipeline diameter has a significant impact on the maximum turning angle of the interface.The larger the pipe diameter,the larger the diameter of the interface rubber ring,resulting in an increase in the contact area between the sealing rubber ring at the interface and the outer pipe wall.The lateral ultimate angular displacement of the two pipe diameters is basically stable at 4°to 5°;Obtain the hysteresis curve areas for the first reciprocating loading of two different pipe diameters at each loading level.Comparison shows that the larger the pipe diameter at the same loading rate,the greater the energy consumption.However,there is no significant difference in energy consumption within the loading level of 0~72 mm(0°~4°).

关 键 词：往复加载 极限转角位移 力学性能 

分 类 号：TU990.3[建筑科学—市政工程]