摘要
海平面上升导致的地下水入侵沿海地区的建筑地基造成显著风险。提出了一个考虑地下水侵入导致土壤强度退化的沿海建筑地基韧性模型。该模型由地基的性能函数在服役期内的积分得到。考虑条形基础的韧性,其极限承载力由Terzaghi公式描述。韧性模型考虑气候变化背景下地下水位的上升对土壤强度的影响。通过一个算例,展示了所提出的韧性模型的适用性。结果表明,如果不考虑气候变化影响下地下水位的上升,则会得到不保守的结构韧性评估结果。结构全寿命周期内的韧性也取决于所采用的维护措施(即,修复受损的结构性能)。未来的研究中,还应考虑其他因素(如锈蚀)对沿海建筑地基性能退化的联合影响。
Groundwater inundation as a consequence of sea level rise triggers significant risks for building foundations in coastal areas. This paper presents a framework to model the resilience of coastal-building foundations in the presence of soil strength deterioration due to water intrusion. The resilience model is mathematically based on the integration of the time-variant performance function within a reference period of interest. A strip foundation is considered, whose ultimate bearing capacity is modeled by the Terzaghi trinomial formula. The rise of groundwater table reduces the strength of soils, and the impact of climate change on groundwater level rise is incorporated in the resilience assessment. An example is presented to demonstrate the applicability of the proposed framework. It is shown that ignoring the effect of groundwater level rise in a changing climate would result in a non-conservative estimate of structural resilience. The life-time resilience is also dependent on the selection of the maintenance strategies, through which the performance function is restored to an enhanced state. Future studies should also consider the joint impact of other factors(e.g., corrosion) on the deterioration of coastal-building foundations.
作者
王草
AYYUB B.M
KUMARI W.G.P
WANG Cao;AYYUB B.M.;KUMARI W.G.P.(School of Civil,Mining and Environmental Engineering,University of Wollongong,Wollongong,Australia;Department of Civil and Environmental Engineering,University of Maryland,College Park,Maryland,USA)
出处
《岩土力学》
EI
CAS
CSCD
北大核心
2023年第1期67-74,共8页
Rock and Soil Mechanics
基金
澳大利亚伍伦贡大学“校长冠名博士后基金”。
关键词
韧性模型
沿海建筑地基
土壤强度变化
地下水入侵
气候变化
resilience model
coastal-building foundation
time-variant soil strength
water intrusion
climate change
