• 学报（中文） •

### 考虑螺栓抗弯刚度的T型连接初始刚度计算方法

1. 1. 同济大学 土木工程学院, 上海 200092； 2. 上海宝冶工程技术有限公司, 上海 200941
• 通讯作者: 罗永峰，男，教授，博士生导师，电话（Tel.）:021-65980531; E-mail:yfluo93@tongji.edu.cn.
• 作者简介:武念铎（1990-），男，辽宁省沈阳市人，博士生，主要研究方向为高强钢端板连接节点力学性能研究.
• 基金资助:
国家自然科学基金资助项目（51408150），中央高校基本科研业务费专项（2014KJ044），财政部2013年施工新技术研究与开发项目（财企（2013）235号），国家重点研发计划重点专项资助项目(2017YFB0304701)

### Calculation of Initial Stiffness of T-Stubs Under Consideration of Bending Stiffness of Bolts

WU Nianduo，QIANG Xuhong，LIU Xiao，LUO Yongfeng

1. 1. College of Civil Engineering, Tongji University, Shanghai 200092, China； 2. Shanghai Baoye Engineering Technology Co., Ltd., Shanghai 200941, China

Abstract: In order to reveal more information on initial stiffness of T-stubs, a brief introduction on calculative methods for predicting mechanical behaviors of T-stubs was firstly presented . Though comparing these methods, the continuous beam model which bending stiffness of bolts are considered was determined to calculate initial stiffness of T-stubs. Comparisons between theoretical and numerical results on initial bending stiffness of a series of T-stubs are presented and good agreements exist. Further, parametric analysis was conducted mainly on flange thicknesses and locations of bolts of T-stubs. The parametric analysis results show that with increase of flange thicknesses the distance between axis of bolts and edges of flange decreases, the influence of bending stiffness on initial stiffness of T-stubs increases. For mild steel T-stubs, when bending stiffness of bolts is considered, initial stiffness improve less than 5%. But for high strength steel (HSS) T-stubs, initial stiffness improves even more than 30%. Thus for HSS T-stubs, bending stiffness of bolts cannot be neglected when calculated initial stiffness of T-stubs.