落石冲击作用下被动柔性防护网整体结构的足尺试验与理论分析及数值模拟

The slope rockfall often occurs as a natural disaster. The passive flexible protection system is widely used, because it is easy to be installed and has stable performance of its main components of steel columns, steel rope, steel wire rope net and the vacuum ring. Researchers to its mostly focus on component testing and construction techniques, but to study the performance of the passive flexible protection system involving accidental rockfall impact of the main components of the constitutive and rockfall trajectory simulation, the overall structure of the nonlinear analysis, the complexity of the design theory frontier issues, domestic and international research in these areas have not yet achieved a breakthrough. Therefore, the security of the passive flexible protective structures, including the Guizhou-Guangxi Railway, Guangyuan-Bazhong highway, Jinping I Hydropower Station and other projects are lack of adequate theoretical and technical support. Calculation of this project expects to establish by experimental means passive flexible protection system of the main components of the material constitutive relation, the overall structure of the nonlinear analysis method, research and numerical simulation of three-dimensional complex dynamic impact, the establishment of a passive flexible protection structure analysis theory, the accuracy and feasibility of full scale test validation research. Through the research of this subject is expected to impact the design of protection systems to provide a theoretical analysis and numerical means to achieve the transformation of China from a big country of flexible protective structures application to study power.

边坡落石是山区常发生的一种自然灾害。以钢柱、钢索、钢丝绳网和减压环为主要构件的被动柔性防护网因其性能稳定、安装便捷等特点而广泛应用。研究者对其大多注重构件试验和施工技术，但研究被动柔性防护网的工作性能涉及偶然落石冲击下主要构件的实际本构关系、整体结构非线性分析、设计理论等复杂的学科前沿问题，国内外在这些方面的研究还未取得突破性进展。所以，包括黔桂铁路、广巴高速公路、锦屏一级水电站等工程的被动柔性防护结构的安全性都缺乏充分的理论和技术保障。本课题期望通过试验手段建立被动柔性防护系统主要构件材料的实际本构关系，提出相应的整体结构非线性分析方法，研究并实现三维复杂动力冲击的数值模拟，建立被动柔性防护结构分析的计算理论，采用足尺试验验证研究成果的的精度及可行性。通过本课题的研究有望为防护系统抗冲击设计研究提供理论分析方法和数值研究手段，实现我国从柔性防护结构应用大国到研究强国的转变。

边坡落石是山区常发生的一种自然灾害。以钢柱、钢索、钢丝绳网和减压环为主要构件的被动柔性防护网因其性能稳定、安装便捷等特点而广泛应用。本课题通过试验手段建立了被动柔性防护系统主要构件材料的实际本构关系，提出了相应的整体结构非线性分析方法，研究并实现了三维复杂动力冲击的数值模拟，建立了被动柔性防护结构分析的计算理论，采用足尺试验验证了研究成果的的精度及可行性。通过本课题的研究为防护系统抗冲击设计研究提供了理论分析方法和数值研究手段，使得被动柔性防护结构在应用方面具备了较为扎实的理论基础支撑。