基于非线性B-B准则的三维楔体地震拟静力可靠度分析(英文)
发布时间:2024-05-21 23:56
本文基于非线性Barton-Bandis(B-B)破坏准则,对地震拟静力作用下三维楔体的系统可靠度展开研究。基于蒙特卡洛算法考虑参数相关性与变异性计算系统可靠度,将计算结果与SWEDGE软件计算结果对比,验证该方法的准确性与适用性。通过开展参数分析讨论各参数变化对系统可靠度的影响规律。探究失效概率、安全系数与变异系数三者相互关系,并绘制地震荷载作用下岩质楔体的稳定概率曲线。研究表明:B-B破坏准则参数相关性对失效概率的影响较大,但相关性对系统可靠度的增加或减小效应受其他参数取值影响;在地震力作用下,沿两不连续面发生破坏的概率对系统失效概率贡献最大,另外三种破坏模式的失效概率对系统失效概率贡献相对较小;随着地震拟静力方向的变化各参数的敏感性系数均处于波动状态,相对敏感性较高的参数是与节理面走向相关的参数θ1和θ2;系统的失效概率是安全系数的大小与其变异系数的函数。
【文章页数】:14 页
【文章目录】:
1 Introduction
2 Rock slope failure model based on nonlinear Barton–Bandis criterion
2.1 Nonlinear Barton-Bandis criterion
2.2 Seismic pseudo-static analysis
2.3 Wedge failure mechanism
2.4 Failure mode and stability analysis
3 Reliability analysis
3.1 System structure
3.2 System reliability calculation
4 Verification
5 Parameter analysis
6 Sensitivity analysis
7 Stability probability curves
8 Conclusions
Appendix
Contributors
Conflict of interest
本文编号:3980100
【文章页数】:14 页
【文章目录】:
1 Introduction
2 Rock slope failure model based on nonlinear Barton–Bandis criterion
2.1 Nonlinear Barton-Bandis criterion
2.2 Seismic pseudo-static analysis
2.3 Wedge failure mechanism
2.4 Failure mode and stability analysis
3 Reliability analysis
3.1 System structure
3.2 System reliability calculation
4 Verification
5 Parameter analysis
6 Sensitivity analysis
7 Stability probability curves
8 Conclusions
Appendix
Contributors
Conflict of interest
本文编号:3980100
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