复杂地质条件下钢筋混凝土结构受力性能数值模拟分析  

Numerical Simulation Analysis of Mechanical Behavior of Reinforced Concrete Structures Under Complex Geological Conditions

作　　者：谢颖[1] XIE Ying(School of Civil Engineering and Architecture,Anhui Technical College of Water Resources and Hydroelectric Power,Hefei 231603)

机构地区：[1]安徽水利水电职业技术学院建筑工程学院,合肥231603

出　　处：《北京建筑大学学报》2023年第5期84-91,共8页Journal of Beijing University of Civil Engineering and Architecture

基　　金：安徽省教育厅质量工程项目(2021jxtd109);安徽省高等学校科学研究项目(2022AH052286)。

摘　　要：为深入分析钢筋混凝土结构受弯承载力,研究不均匀复杂地质条件下钢筋混凝土结构受弯承载力数值模拟方法。以某城市东延线大桥主桥作为不均匀复杂地质条件研究对象,设计钢板桩围堰(A1)、钢管桩围堰(A2)以及钢筋混凝土排桩(A3)3种支护结构,并通过数值模拟方法,模拟不同支护结构在不同荷载以及开挖深度下的挠度、应力、位移、弯矩等指标的变化情况。模拟结果显示:钢筋混凝土排桩(A3)支护结构在较大载荷下可以保持较大的应力,同时产生较小挠度以及位移,具备较大承载能力,还能够在开挖过程中保持较小的弯矩以及失稳比,使支护过程具备较高的稳定性;并保障较低的变形速度与加速度,使钢筋混凝土支护结构更加安全。To conduct in-depth analysis of the flexural bearing capacity of reinforced concrete structures,a numerical simulation method for the flexural bearing capacity of reinforced concrete structures under uneven and complex geological conditions is studied.Taking the main bridge of the East Extension Line Bridge in a certain city as the research object for uneven and complex geological conditions,three support structures were designed:steel sheet pile cofferdam(A1),steel pipe pile cofferdam(A2),and reinforced concrete row pile(A3).Through numerical simulation method,the changes in deflection,stress,displacement,bending moment and other indicators of different support structures under different loads and excavation depths were simulated.The simulation results show that the reinforced concrete row pile(A3)support structure can maintain large stress under large loads,generate small deflection and displacement,and have large bearing capacity.It can also maintain small bending moments and instability ratios during excavation,making the support process highly stable,and ensure lower deformation speed and acceleration,making the reinforced concrete support structure safer.

关 键 词：不均匀 复杂地质条件 钢筋混凝土 受力性能 数值模拟 

分 类 号：TU476.4[建筑科学—结构工程]