预应力锚杆作用机制的进一步分析  

Further study on mechanics of pre-stressed anchor bolt

作　　者：吴永[1,2] 何思明[1] 李新坡[1] 

机构地区：[1]中国科学院-水利部成都山地灾害与环境研究所,四川成都610041 [2]中国科学院研究生院,北京100039

出　　处：《四川建筑科学研究》2010年第1期97-100,共4页Sichuan Building Science

基　　金：国家自然科学基金项目(40572158);交通部西部科技项目(2006-318-792-85)

摘　　要：针对预应力锚杆作用机制研究方面存在的问题,以文章《预应力锚杆作用机制研究》[7]中提供的锚杆在完全粘结条件下界面剪应力分布公式为基础,在考虑界面本构关系的情况下,分析了锚束体界面剪应力的分布规律和影响因素。并在进一步理论分析的基础上,研究了在允许脱粘情况下,特定锚固长度锚杆体系的极限承载力和特定承载力锚杆的最小锚固长度问题。结果显示,特定长度锚杆存在极限承载力,并且其大小与锚固体系的性质直接相关。Specifically for the problem on pre-stressed anchor bolt mechanism, take the interface shear stress distributing formula of bend bolt provided in article 《STUDY ON MECHANICS OF PRE-STRESSED ANCHOR BOLT》 as basis and with the condition of considering the interface constitutive relation, the stress distribution law and its influencing factors have been analyzed. Then base on the further theory analyses ,the ultimate bearing capacity of the certain length anchor has also been studied clearly. The result shows to certain pole of length,the ultimate bearing capacity is certain and connected with anchoring system character.

关 键 词：预应力锚(索)杆 作用机制 脱粘长度 极限承载力 

分 类 号：TU753.8[建筑科学—建筑技术科学] TU458