题目：面向韧性和快速拼装钢结构建造的新型模块化节点

A New Approach for Resilient and Rapidly Erectable Steel Structures

时间：2022年4月8日周五8：30－9：30

地点：腾讯会议 ID：93382698531

腾讯直播间：https://meeting.tencent.com/l/hA1SrLFrwFwl

报告人：Ashley P. Thrall（美国圣母大学，土木环境工程与地球科学系结构工程，Myron and Rosemary Noble研究中心）

欢迎广大师生参加！

土木与交通学院

2022年4月6日

报告人简介：

   Ashley P. Thrall博士是美国圣母大学土木环境工程与地球科学系，结构工程方向Myron and Rosemary Noble冠名副教授。她在美国瓦萨学院获得物理学学士学位，随后在普林斯顿大学获得土木工程和环境工程硕士及博士学位。毕业后便进入圣母大学，Thrall教授创建了可变结构实验室，基于数值和实验方法，她的研究主要集中在可变民用基础设施的力学行为、设计和优化上，致力于开发具有可快速移动、拼装以及部署的模块化桥梁、避难所和建筑物。Thrall教授曾荣获多项奖项，包括美国国家科学基金会CAREARAward、美国钢结构协会职业生涯早期奖和国际壳体与空间结构协会颁发的Hangai奖。

Dr. Ashley P. Thrall is the Myron and Rosemary Noble Associate Professor of Structural Engineering in the Department of Civil & Environmental Engineering & Earth Sciences at the University of Notre Dame where she directs the Kinetic Structures Laboratory. Her research investigates the behavior, design, and optimization of kinetic civil infrastructure utilizing numerical and experimental approaches. Kinetic bridges, shelters, and buildings include modular systems, which are rapidly movable, erectable, and deployable. Dr. Thrall has won several distinguished awards, including an NSF Faculty Early Career Development (CAREER) award, the American Institute of Steel Construction Early Career Faculty Award, and the Hangai Prize from the International Association for Shells and Spatial Structures. She earned her PhD and MSE in Civil & Environmental Engineering from Princeton University and her BA in Physics from Vassar College.

报告摘要：

   在钢桥和钢结构建筑的设计、制造和安装过程中，构件之间的连接是至关重要的环节。设计师通常会开发一种结构形式，然后设计连接件以满足几何和结构要求。然而，这就导致需要复杂的构件连接，其制造起来既困难又昂贵，甚至每个连接都可能是独一无二的，大大提升了制造和安装的复杂性。为了应对这一挑战，本期讲座将介绍一种新型模块化建造方法，即使用(1)易于制造和安装的模块化节点和(2)可调节的螺栓钢板连接。具体来说，我们开发了用于平面结构的二维(2D)以及用于空间结构的三维(3D)模块化节点。模块化节点是由焊接件/腹板和法兰盘组成的钢节点连接件，其中包括每个连接构件的起始部分。可调螺栓钢板连接是一种滑移临界、双剪、拼接连接，可按一定角度连接构件，并能够就地调整以实现多角度变化，或对于安装和制造过程中出现的偏差进行补偿。通过在现场拧紧螺栓从而进一步冷弯板材，便能实现其可调性。这为桁架式、板式或梁式受力行为提供了弯曲刚度，并使结构可容许构件损失。构件组合后，模块化连接节点和可调螺栓钢板连接形成了一种“构件组合”式方法，其中构件是标准截面，预制的模块化连接可以在单个结构中重复使用，也可以用于许多不同的结构。本报告将展示对模块化节点和可调螺栓钢板连接的性能所进行的数值与实验研究。

A major challenge in the design, fabrication, and erection of steel bridges and buildings is the connection between members. Designers typically develop a structural form, and then design connectors to meet geometric and structural demands. However, this leads to complicated connections that are difficult and expensive to fabricate. Each connection is often unique, further complicating the fabrication and erection. To address this challenge, this research presents a new approach to modular construction using (1) a modular joint designed for ease of fabrication and erection and (2) an adjustable bolted steel plate connection. Specifically, a two-dimensional (2D) modular joint for planar structures and a three-dimensional (3D) modular joint for spatial structures have been developed. The modular joints are steel nodal connectors comprised of a weldment/built up section of webs and flanges that includes a starter segment for each connecting member. The adjustable bolted steel plate connection is a slip-critical, double shear, splice connection that can join members at a range of angles as well as adjust in-situ to achieve additional angles or compensate for erection and fabrication tolerances. Adjustability is achieved by further cold bending the plates in the field through bolt tightening. This provides flexural stiffness for truss-like, membrane-like or beam-like behavior and enables the structure to tolerate member loss. Combined, the modular joint and the adjustable bolted steel plate connection form a “kit-of-parts” type approach, where members are standard sections and prefabricated modular joints can be repeated throughout a single structure and also used for many different structures. This presentation will feature numerical and experimental research into the behavior of the modular joint and the adjustable bolted steel plate connection.