摘要
为研究横隔板对分幅布置的连续梁桥受力性能的影响,本文以某三跨等高度等宽度预应力连续梁桥为例,建立四种不同厚度横隔板的整体有限元模型,对比分析其内力状态和应力状态的变化规律,同时建立跨中节段局部模型分析横隔板和跨中截面局部受力情况。结果表明,两幅独立的连续梁桥通过建立不同厚度横隔板连接后,增强了结构的整体性,使得结构各关键截面的内力和应力均有所减小;而当选择厚度为60cm的横隔板时,弯矩最大幅度减小了34.94%,剪力最大幅度减小了33.75%,应力最大幅度减小了36.86%;并且60cm横隔板局部主拉应力最小,仅为2.35MPa,因此综合而言选60cm厚度横隔板对结构整体受力较好。
In order to study the influence of transverse partitions on the mechanical performance of a three-span prestressed continuous beam bridge with equal height and width,this paper takes a three-span prestressed continuous beam bridge with equal height and width as an example,establishes the integral finite element model of four kinds of transverse partitions with different thickness,compares and analyzes the changes of their internal force state and stress state,and establishes the local model of the mid-span segment to analyze the local stress situation of the transverse partitions and mid-span section.The results show that the integrity of the structure is enhanced and the internal force and stress of the key sections of the structure are reduced after the two independent continuous beam bridges are connected by the different thickness of the transverse partition.When the transverse partition thickness is 60cm,the bending moment,shear force and stress are reduced by 34.94%,33.75%and 36.86%respectively.Moreover,the local principal tensile stress of the 60cm transverse partition is the smallest,which is only 2.35MPa.Therefore,in general,the transverse partition with a thickness of 60cm has a better overall stress on the structure.
作者
刘志峰
LIU Zhi-feng(The Fifth Construction Ltd.of China Tiesiju Civil Engineering Group,Jiujiang 332005,China)
出处
《价值工程》
2023年第33期102-104,共3页
Value Engineering
关键词
连续梁桥
优化设计
横隔板
局部分析
continuous beam bridge
optimization design
transverse diaphragm
local analysis
