预应力锚索格构梁的设计及试验研究
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摘要
以破碎岩质边坡为例,采用节点荷载分配法计算了锚索锚固力在格构梁纵、横梁之间的分配比率,然后基于Winkler弹性地基模型和弹性半空间地基模型分别计算格构梁在张拉阶段的内力,并与采用简化的地基反力计算值对比;采用朗肯土压力理论近似计算在工作阶段主动岩体压力,将地梁视为在线性分布力作用下倒置于坡面上的连续梁,按力矩分配法计算地梁内力,取两阶段计算平均值进行配筋。通过对比分析理论计算最大值、采用简化的地基反力计算值和实测值,结果表明采用两阶段设计能较好地反应格构梁的实际受力情况,且设计安全,而简化的地基反力为手工计算带来了方便。这对工程中预应力锚索格构梁复合结构的设计计算具有一定的参考价值。
In combination with the crushed rock slope as an example,the allocation of an anchorage force on longitudinal beams and transverse beams is calculated by adopting the distribution coefficient law of the nodal form at first.Then the internal forces of the lattice beam are calculated respectively through the software on the basis of Winkler elastic foundation model and the semi-infinite foundation model,and then compared with the internal forces which are based on simplified foundation pressure calculation.The active pressure of rock is calculated approximately by Ranking soil pressure theory in the working stage.Sequentially,the reinforcing bars are disposed by two-stage's averagely calculated values.Through comparing the calculated values with experimented results,the research result indicates that the actual situation of the lattice beam can be well reflected by using two stages.Moreover,the simplified foundation pressure is of benefit to the hand labor calculation.It is of referential value for the design of complex structure of prestressed anchor-cable and lattice beam.
In combination with the crushed rock slope as an example,the allocation of an anchorage force on longitudinal beams and transverse beams is calculated by adopting the distribution coefficient law of the nodal form at first.Then the internal forces of the lattice beam are calculated respectively through the software on the basis of Winkler elastic foundation model and the semi-infinite foundation model,and then compared with the internal forces which are based on simplified foundation pressure calculation.The active pressure of rock is calculated approximately by Ranking soil pressure theory in the working stage.Sequentially,the reinforcing bars are disposed by two-stage's averagely calculated values.Through comparing the calculated values with experimented results,the research result indicates that the actual situation of the lattice beam can be well reflected by using two stages.Moreover,the simplified foundation pressure is of benefit to the hand labor calculation.It is of referential value for the design of complex structure of prestressed anchor-cable and lattice beam.
引文
[1]马迎娟.预应力锚索格构梁复合结构的模型试验研究[D].四川:成都理工大学,2005.
[2]许英姿,唐辉明.滑坡治理中格构锚固结构的解析解分析[J].地质科技情报,2002,21(3):89-93.
[3]许英姿,唐辉明.滑坡治理中预应力锚索格构梁受力分析[J].安全与环境工程,2002,9(3):24-26.
[4]杨天林主编.基础工程[M].北京:人民交通出版社,1999.
[5]杨永新,冯玉芹,张春梅.简明基础工程[M].北京:地震出版社,2002.
[6]廖小平,卢才金,胡厚田,等.路堑土质边坡加固中预应力锚索框架的内力计算[J].岩石力学与工程学报,2002,21(9):1383-1386.
[7]肖世国,周德培.岩石高边坡预应力锚索地梁的一种内力计算方法[J].岩石力学与工程学报,2003,2(22):250-253.
[8]宋从军,周德培,肖世国.预应力锚索地梁的内力计算[J].西南交通大学学报,2001,36(5):486-490.
[9]张季容,朱向荣.简明建筑基础计算与设计手册[M].北京:中国建筑工业出版社,1997.
[10]唐辉明,许英姿,程新生.滑坡治理工程中钢筋混凝土格构梁设计理论研究[J].岩土力学,2004,25(11):1683-1687.
[11]王幼青.高层建筑结构地基基础设计[M].哈尔滨:哈尔滨工业大学出版社,2007.
[12]欧巍,欧国荣,罗阳明.用朗肯理论计算边坡预应力锚索地梁上土压力[J].路基工程,2007,(1):81-82.
[13]GB50010-2002,混凝土结构设计规范[S].
[14]李立.混凝土格构锚固支护体系中格构梁的受力机理与设计方法研究[D].重庆:重庆大学,2005.
[2]许英姿,唐辉明.滑坡治理中格构锚固结构的解析解分析[J].地质科技情报,2002,21(3):89-93.
[3]许英姿,唐辉明.滑坡治理中预应力锚索格构梁受力分析[J].安全与环境工程,2002,9(3):24-26.
[4]杨天林主编.基础工程[M].北京:人民交通出版社,1999.
[5]杨永新,冯玉芹,张春梅.简明基础工程[M].北京:地震出版社,2002.
[6]廖小平,卢才金,胡厚田,等.路堑土质边坡加固中预应力锚索框架的内力计算[J].岩石力学与工程学报,2002,21(9):1383-1386.
[7]肖世国,周德培.岩石高边坡预应力锚索地梁的一种内力计算方法[J].岩石力学与工程学报,2003,2(22):250-253.
[8]宋从军,周德培,肖世国.预应力锚索地梁的内力计算[J].西南交通大学学报,2001,36(5):486-490.
[9]张季容,朱向荣.简明建筑基础计算与设计手册[M].北京:中国建筑工业出版社,1997.
[10]唐辉明,许英姿,程新生.滑坡治理工程中钢筋混凝土格构梁设计理论研究[J].岩土力学,2004,25(11):1683-1687.
[11]王幼青.高层建筑结构地基基础设计[M].哈尔滨:哈尔滨工业大学出版社,2007.
[12]欧巍,欧国荣,罗阳明.用朗肯理论计算边坡预应力锚索地梁上土压力[J].路基工程,2007,(1):81-82.
[13]GB50010-2002,混凝土结构设计规范[S].
[14]李立.混凝土格构锚固支护体系中格构梁的受力机理与设计方法研究[D].重庆:重庆大学,2005.
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