欢迎您！东篱公司
退出
-
申报数据库
-
立项数据库
-
成果数据库
-
项目获奖数据库
中文摘要：
大坝受袭的可能方式主要有直接命中坝体爆炸、库前水中爆炸、库区近空爆炸。本文考虑爆炸冲击荷载作用下混凝土的高应变率效应,通过构建重力坝侵彻爆炸、水中爆炸和空中爆炸的全耦合模型,对不同爆炸方式下的大坝动态响应进行了全性能数值仿真,探讨了混凝土重力坝在不同爆炸方式下的可能破坏模式及抗爆性能,并重点研究了水中爆炸冲击荷载下局部配置抗爆钢筋对大坝动态响应的影响,给出了配筋前后大坝开裂破坏范围及坝顶动位移响应,为大坝抗爆性能评估和防护设计提供基础。研究表明,水中爆炸冲击荷载作用下大坝的破坏效应较大,水下贴坝面爆炸时大坝破坏最严重;侵彻爆炸和空中爆炸的毁伤效应主要表现为坝体的局部破坏效应;采取配筋抗爆措施能够显著限制坝体裂缝的扩展与贯穿,减少坝体开裂破坏范围,有效地改善坝体的抗爆性能。
英文摘要：
Dams may be mainly subjected to penetration explosion,underwater explosion,air explosion.Strain rate effect of concrete was taken into consideration in the establishment of fully coupled model of gravity dams.Numerical simulation was conducted to study the dynamic response of the dam when subjected to different blast loads.The possible failure mode and antiknock performance of concrete gravity dams was discussed.According to the dynamic response and failure mode of dam subjected to underwater explosion,the impact of local blast-resistant reinforcement was researched.At the same time,the extent of cracks and the dynamic displacement response of dam crest were also given.This can provide references to the antiknock performance-based assessment and protective design.Our research shows that damage effects of the dams are larger when subjected to underwater blast loading,and the dam is in the most severely damage when the bomb is attached to dam surface.Penetration explosion and air explosion effects of damage on the dam are characterized by local damage effects.Reinforcement measures can limit antiknock expansion of cracks significantly,reduce the extent of damage,and improve the antiknock performance effectively.
同期刊论文项目
同项目期刊论文
Two-phase flow numerical simulation of a bend-type ice sluice in the diversion water channel of powe
Experimental study on the bed topography evolution in alluvial meandering rivers with various sinuou
Analysis of agricultural pollution by flood flow impact on water quality in a reservoir using a thre
Three-dimensional simulation of the water flow field and the suspended-solids concentration in a cir
Numerical investigation on vortex-induced vibration of an elastically mounted circular cylinder at l
An Integrated Groundwater Management Mode Based on Control Indexes of Groundwater Quantity and Level
Short-term optimal operation of Three-gorge and Gezhouba cascade hydropower stations in non-flood se
Risk identification on hydropower project using the IAHP and extension of TOPSIS methods under inter
The effects of strong motion duration on the dynamic response and accumulated damage of concrete gra
Observation of microscopic damage accumulation in brittle solids subjected to dynamic compressive lo
Laboratory observation of acoustic fluidization in granular fault gouge and implications for dynamic
Laboratory measurements of the rate dependence of the fracture toughness anisotropy of Barre granite
Optimal sensor placement for large structures using the nearest neighbour index and a hybrid swarm i
Joint impact of rainfall and tidal level on flood risk in a coastal city with a complex river networ
Eulerian-Eulerian solid-liquid two-phase flow of sandstone wastewater in a hydropower station rectan
Research on virtual-reality interactive simulation for concrete dam construction process based on ve
Seismic cracking analysis of concrete gravity dams with initial cracks using the extended finite ele
Constructioin Schedule Real-time Control Coupling Consruction Quality in Large Scale Underground Pow
Comprehensive Evaluation of the Coupling Construction Progress and Quality of High Core Rockfill Dam
Joint probability distribution of winds and waves from wave simulation of 20 years (1989-2008) in Bo
Construction Schedules Simulation and Prediction of Water Conveyance Tunnel Based on Karst Geologica
Research on Management Information System for Construction Consultant in Hydropower Project Based on
A Study on the Controllability of Deepwater Manifold during Launch through Pendulous Installation Me
Research on Construction Schedule Real-Time Control of High Core Rock-Fill Dam Based on Digital Moni
Tracking methods for free surface and simulation of a liquid droplet impacting on a solid surface ba
Finite element analysis on thermal upheaval buckling of submarine burial pipelines with initial impe
期刊信息
位置：