近场高烈度区新型地锚扶壁式泥石流格栅坝地震响应分析

英文篇名：Seismic response analysis of a new ground anchor counterfort grille-dam for debris flow under near-fault pulse-like ground motions
中文刊名：水利学报
英文刊名：Journal of Hydraulic Engineering
作者：王永胜 ; 朱彦鹏 ; 王亚楠
英文作者：WANG Yong-sheng1 ; 2 ; ZHU Yan-peng1 ; 2 ; WANG Ya-nan1 ; 2 (1. Key Laboratory of Disaster Prevention and Mitigation in civil Engineering of Gansu Province ; Lanzhou University of Technology ; Lanzhou 730050 ; China ; 2. College of Civil Engineering ; Lanzhou University of Technology ; Lanzhou 730050 ; China)
中文关键词：近场地震动 ; 新型泥石流格栅坝 ; 动力模型 ; 地震响应
英文关键词：near-fault ground motion ; a new grille-dam of debris flow ; dynamic model ; seismic response
出版日期：2012-12-15
机构：兰州理工大学甘肃省土木工程防灾减灾重点实验室;兰州理工大学土木工程学院;
年：2012
期：S2
出版单位：水利学报

摘要

通过对白龙江流域既有的泥石流防治工程措施进行现场调研,分析了工程防治理念和防治措施上的问题,提出了新型地锚扶壁式泥石流格栅坝。通过将格栅和扶壁墙离散化为质点串,而拉索以弹簧支座的形式代替,取一榀格栅柱为计算单元,建立相应的动力方程。最后将速度脉冲模型与随机地震地面运动模型联合起来生成近场脉冲型地震动,并以此作为激励,对近场脉冲型地震动作用下新型泥石流格栅坝的地震响应进行了分析。
On the basis of the on-site survey of debris flow control engineering measures at the Bailongjang River basin,the success or failure of prevention measures and concept are analyzed and a new ground anchor counterfort grille-dam for debris flow is proposed. The grille and counterfort wall analysis model consists of a set of discrete lumped masses based on the concentrated mass method. The cable is insteaded by spring supports. The corresponding control equation of motion is established by taking the grille-column as a calculating unit. A pulse model and a stochastic ground motion model are combined to simulate the near-fault ground motions. The seismic response of the new grille-dam under simulated near-fault ground motions is analyzed. The results can provide a reference for the new grille-dam to next step of the seismic design and structure type, in order to widely use of the new grille-dam in debris flow control engineering.

引文

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