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| 预应力锚固机制数值模拟研究 | |
| 引用本文： | 王忠昶,杨庆,赵德深.预应力锚固机制数值模拟研究[J].大连理工大学学报,2009,49(2):254-260. |
| 作者姓名： | 王忠昶 杨庆 赵德深 |
| 作者单位： | 1. 大连理工大学,土木水利学院,岩土工程研究所,辽宁,大连,116024;大连大学,建筑工程学院,辽宁,大连,116622;大连理工大学,海岸和近海工程国家重点实验室,辽宁,大连,116024 2. 大连理工大学,土木水利学院,岩土工程研究所,辽宁,大连,116024;大连理工大学,海岸和近海工程国家重点实验室,辽宁,大连,116024 3. 大连大学,建筑工程学院,辽宁,大连,116622 |
| 基金项目： | 国家自然科学基金资助项目(50678032,50574016);;辽宁省教育厅基金资助项目(2008z030) |
| 摘 要： | 针对预应力锚索加固时锚固段与自由段受力机制的不同,依据等效应变和等效温度法建议了一种新的预应力施加方法,并采用有限元方法模拟了预应力锚索加固岩体的受力机制.给出了不同锚固条件下锚固段和岩体的受力变形特征,指出了应用预应力锚索加固时应该注意的问题:张拉式预应力锚索加固的岩体在内锚固段周围的岩体是受拉的,群锚时使得内锚固段附近的岩体形成拉应力带,这种拉应力带对岩体的稳定十分不利,应积极采用不等长锚索,以使内锚头分散布置在岩体的不同层位中;群锚条件下锚索之间外锚头位置岩体有受拉现象,在满足工程需要的条件下锚索的布置间距应适当放大. |
| 关 键 词： | 预应力 数值模拟 拉应力区 锚固 |
Numerical simulation study of pre-stress reinforcement mechanism |
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| WANG Zhongchang,YANG Qing,ZHAO Deshen.Numerical simulation study of pre-stress reinforcement mechanism[J].Journal of Dalian University of Technology,2009,49(2):254-260. | |
| Authors: | WANG Zhongchang YANG Qing ZHAO Deshen |
| Institution: | 1.Institute of Geotechnical Engineering;School of Civil and Hydraulic Engineering;Dalian University of Technology;Dalian 116024;China;2.College of Civil and Architectural Engineering;Dalian University;Dalian 116622;3.State Key Laboratory of Coastal and Offshore Engineering;China |
| Abstract: | A new method of equivalent pre-stress is suggested by using the methods of equivalent strain and temperature according to different working mechanisms between free segment and the consolidated segment of pre-stress anchor cable.The mechanism for reinforcement of pre-stress anchor cable is simulated by finite element.The mechanical and distortional character of the consolidated segment and rock mass under different consolidated conditions are presented.Some attentions to using pre-stress anchor cable are ind... |
| Keywords: | pre-stress numerical simulation tension stress zone reinforcement |
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