﻿ 桥梁高墩在弹性支座条件下的稳定性计算 Stability Analysis of the High Bridge Pier under Condition of Elastic Supports

Hans Journal of Civil Engineering
Vol.04 No.06(2015), Article ID:16350,6 pages
10.12677/HJCE.2015.46030

Stability Analysis of the High Bridge Pier under Condition of Elastic Supports

Shaohong Lu1, Linong Liang1, Xiong Liang1, Xueming Fan2, Zhigang Liang2, Keyan Li2

2School of Civil Engineering and Transportation, South China University of Technology, Guangzhou Guangdong

Received: Oct. 23rd, 2015; accepted: Nov. 10th, 2015; published: Nov. 17th, 2015

ABSTRACT

Recently, with the development of mountain highway, the height of bridge pier has also increased. Stability of the high pier of bridge is a crucial part of bridge design; therefore, stability analysis of high pier is increasingly outstanding. In this paper, based on existing stability calculation methods, we make a further research into the problem of stability analysis of the high pier with elastic supports in both sides and derive corresponding formulas, which are applied into actual bridge design. A further research into the problem of stability calculation of piers with elastic supports in both sides is made, and corresponding formulas are derived and applied into actual bridge design. Number examples also show the validity of calculation formulas in this paper.

Keywords:High Pier, Stability Analysis, Elastic Support

1广东省公路勘察规划设计院股份有限公司，广东 广州

2华南理工大学土木与交通学院，广东 广州

1. 引言

2. 计算模型的选取

3. 临界荷载的计算

(1)

(2)

(3)

(a) 计算模型 (b) 整体受力图(c)局部受力图

Figure 1. Calculation diagram

，则 式可改写成以下形式：

(4)

(5)

3.1. 压杆两端均为简支。

(6)

(7)

(8)

(9)

(10)

(11)

3.2. 压杆两端均为固支

(12)

(13)

(14)

(15)

(16)

(17)

3.3. 压杆两端均为弹性支撑

(18)

(19)

(20)

(21)

4. 算例

Table 1. The critical loads of pier

Table 2. The calculate length of compressed beam

5. 结论

Stability Analysis of the High Bridge Pier under Condition of Elastic Supports[J]. 土木工程, 2015, 04(06): 237-242. http://dx.doi.org/10.12677/HJCE.2015.46030

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