﻿ PBL剪力键承载力计算与有限元分析 The Carrying Capacity Calculation and Finite Element Analysis to PBL Shear Key

Hans Journal of Civil Engineering
Vol.04 No.01(2015), Article ID:14739,4 pages
10.12677/HJCE.2015.41008

The Carrying Capacity Calculation and Finite Element Analysis to PBL Shear Key

Baochu Yu1,2*, Yiqun Zhang1, Yunlong Zhang1

1Dalian Ocean University, Dalian, Liaoning

2State Key Laboratory of Structural Analysis for Industrial Equipment, Dalian University of Technology, Dalian, Liaoning

Email: *baochuyu@.dlou.edu.cn, 334810347@qq.com

Received: Dec. 26th, 2014; accepted: Jan. 17th, 2015; published: Jan. 22nd, 2015

ABSTRACT

In view of PBL shear key playing an increasingly importantly role in all aspects of civil engineering, we firstly analyze and discuss the theoretical formula, then make model with MIDA FEA. Displacement stress from static load had been analyzed and compared. At last, PBL shear bond stress at critical locations and displacement in different conditions is calculated. The calculation results show that: The model in the whole loading process, works in a good condition with no obvious damage phenomenon, and the carrying capacity has a large safety margin.

Keywords:PBL Shear Key, Carrying Capacity Calculation, Finite Element Analysis

PBL剪力键承载力计算与有限元分析

1大连海洋大学，辽宁，大连

2大连理工大学工业装备与结构分析国家重点实验室，辽宁，大连

Email: *baochuyu@.dlou.edu.cn, 334810347@qq.com

1. 引言

PBL剪力键由带孔的钢板组成，可焊接在工字形截面的上翼缘，孔内可穿入钢筋。浇注混凝土后，孔内的混凝土形成一系列的混凝土棒状榫来抵抗钢构件和混凝土构件之间的竖向掀起，带孔的钢板主要抵抗水平剪力，能在钢与混凝土之间提供强大的连接作用，并具有很好的抗疲劳性能。很多研究表明，PBL剪力键无论在加工制作还是力学性能方面都比传统的剪力连接件有很大的优势[2] 。目前国内外还没有规范对PBL键的形式、尺寸和承载能力作出规定[3] ，而PBL剪力键正是这种结构当中连接钢腹板与上下混凝土翼板的关键部件。因此，对PBL剪力键进行深入细致的分析就显的尤为必要。

2. PBL剪力键承载力理论计算

PBL剪力键的极限承载力一般指的是开孔钢板上的单孔极限剪切力。影响其大小的因素很多，如混凝土强度、钢筋的屈服强度、贯穿钢筋直径、钢板开孔直径等等。对于理论计算，下面给出近期一些学者在试验基础得出的计算方法。

Perfobond Strip的剪力键设计公式[4] ：

(1)

(2)

(3)

3. PBL剪力键有限元分析

Table 1. Carrying capacity comparison results of PBL shear key

Figure 1. The finite element model and mesh map of shear key

Figure 2. The displacement contours of PBL shear key and FanMises stress cloud

4. 结语

PBL剪力键在桥梁工程中发挥的作用越来越大，对其进行深入研究很有必要。本文从两个方面对其进行了尝试性的讨论分析，一是简要总结了PBL剪力键极限承载力的理论计算，二是利用MIDAS FEA有限元软件对其应力和变形做了简单分析，可以更加直观地认识到其内部应力应变分布变化规律。

Figure 3. The comparison chart of PBL Shear before and after deformation

Figure 4. Maximum displacement and stress for some position under different load

The Carrying Capacity Calculation and Finite Element Analysis to PBL Shear Key. 土木工程,01,67-71. doi: 10.12677/HJCE.2015.41008

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