不同厂坝连接型式下的厂房稳定性分析
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摘要
针对某坝后式水电站厂坝连接问题,建立了包括厂坝、基岩及其软弱结构带在内的整体有限元模型,并在分缝处设置以接触力为未知量的接触单元,采用有限元混合法研究了在自重、水压力、地震作用及泄洪振动下,不同厂坝连接型式下厂房受力变形特征、厂坝整体抗滑稳定性及厂房泄洪振动响应特性。结果表明,厂坝平缝连接既能有效改善厂房的静动力响应状态(应力、位移、加速度等),又能提高厂房结构、机组正常稳定运行及厂坝整体抗滑稳定安全系数,具有一定的合理性和工程实际意义。
Aiming at the connection problem of power station at dam toe,an integral finite element model including dam,powerhouse,bedrock and weak structure plane in bedrock was established.And this analysis model defined the parting elements as the contact elements based on an unknown contact force.This paper researched the stress and deformation of powerhouse,the stability against sliding with different joins and the responses of vibration by flood discharge under gravity force,water pressure load,seismic load and discharge vibration.The results show that combination of dam-powerhouse ameliorates the stress situation,the static and dynamic responses and the unit operation situation;it strengthens the stability against sliding as well,which has a certain rationality and engineering actual significance.
Aiming at the connection problem of power station at dam toe,an integral finite element model including dam,powerhouse,bedrock and weak structure plane in bedrock was established.And this analysis model defined the parting elements as the contact elements based on an unknown contact force.This paper researched the stress and deformation of powerhouse,the stability against sliding with different joins and the responses of vibration by flood discharge under gravity force,water pressure load,seismic load and discharge vibration.The results show that combination of dam-powerhouse ameliorates the stress situation,the static and dynamic responses and the unit operation situation;it strengthens the stability against sliding as well,which has a certain rationality and engineering actual significance.
引文
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[2]黄安录.水电站厂坝联合作用的受力特性分析[J].陕西水力发电,1995,11(2):11-15,21.
[3]李明,刘婕,伍鹤皋.灌浆高程对厂坝分缝处大坝应力应变的影响分析[J].水电能源科学,2010,28(7):102-105,137.
[4]张伟,伍鹤皋,吴海林.坝后式水电站厂坝连接形式研究[J].水电能源科学,2005,23(6):36-38.
[5]苑举卫,杜成斌,洪永文.厂坝联合作用下重力坝厂房坝段静动抗滑稳定分析[J].河海大学学报(自然科学版),2008,36(2):229-233.
[6]Katona M C,Zienkiewicz O C.A Unified Set of Sin-gle-step Algorithms Part 3:The Beta-m Method,aGeneralization of the Newmark Scheme[J].Interna-tional Journal for Numerical Methods in Engineer-ing,1985,21(7):1 345-1 359.
[7]赵兰浩.考虑坝体—库水—地基相互作用的有横缝拱坝地震响应分析[D].南京:河海大学,2006.
[2]黄安录.水电站厂坝联合作用的受力特性分析[J].陕西水力发电,1995,11(2):11-15,21.
[3]李明,刘婕,伍鹤皋.灌浆高程对厂坝分缝处大坝应力应变的影响分析[J].水电能源科学,2010,28(7):102-105,137.
[4]张伟,伍鹤皋,吴海林.坝后式水电站厂坝连接形式研究[J].水电能源科学,2005,23(6):36-38.
[5]苑举卫,杜成斌,洪永文.厂坝联合作用下重力坝厂房坝段静动抗滑稳定分析[J].河海大学学报(自然科学版),2008,36(2):229-233.
[6]Katona M C,Zienkiewicz O C.A Unified Set of Sin-gle-step Algorithms Part 3:The Beta-m Method,aGeneralization of the Newmark Scheme[J].Interna-tional Journal for Numerical Methods in Engineer-ing,1985,21(7):1 345-1 359.
[7]赵兰浩.考虑坝体—库水—地基相互作用的有横缝拱坝地震响应分析[D].南京:河海大学,2006.
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