Resilience of concrete structures was the main theme of the fib symposium 2020 in Shanghai, and in this editorial, I present some reflections from my online key‐note lecture given at that occasion. I hope that these reflections can offer some food for thought on the future of the construction industry in general and of structural concrete in particular.

Resilience stems from the Latin word resilio which means to jump back or to rebound from shocks which occur suddenly or more gradually. In the strict structural sense we can consider resilience of systems related to shock wise events such as explosions, earthquakes, fires, etc. which can be linked to robustness and redundancy. Resilience can also be considered with respect to the capacity of a system or society to resist climate change or pandemics.

A further step is to look to the resilience of our society and the industry with respect to digitalization. We cannot deny the huge influence of digitalization on our daily life, characterized by a high degree of interconnectivity and information exchange at an amazingly high speed. The Internet of Things (IoT) is a network of physical objects that are embedded with sensors, software, and other technologies for the purpose of connecting and exchanging data with other devices and systems over the internet. Of course, this IoT also offers some threats and cybersecurity has become a hot topic. Examples of the IoT are smart cities where traditional networks and services are made more efficient with the use of digital and communication technologies to support a city's resilience and sustainability.

Artificial Intelligence (AI) has seen a rapid development in recent years, including machine learning and deep learning. In combination with drones appearing on the building sites and with embedded sensors, AI allows an optimized assessment and upgrading approach of existing structures. The implementation in industry of all these new evolutions is often called Industry 4.0, or the fourth industrial revolution.

The COVID‐19 pandemic has also a disruptive effect on the construction industry in the sense that transformations that were already taking place, will be accelerated. We will evolve to production systems that increasingly make use of modular components, automated manufacturing, robotics supported on‐site execution and digital planning and production. All these trends will undoubtedly increase productivity as we experienced in the precast concrete industry.

We also see Virtual Reality and Augmented Reality appearing on building sites resulting in a fully interactive 3D experience and thus improving the quality of the built environment.

BIM allows to create a virtual model of a building that is made up of dynamic and intelligent virtual building components that contain information about their identity and geometry. The information stored in the BIM model can be extracted from it in various ways: in the form of plans, sections, 3D views, bill of quantities, estimates, space layouts, solar studies, etc.

Worldwide we see applications of 3D printing, which allows full flexibility in defining the shape of concrete components and which can even be adapted to an optimized flow of forces, offering additional freedom in conceptual design.

In the last decades, concrete evolved from a basic building material towards a tailor‐made multi‐component cementitious material with varying degrees of alternative binders. A full life cycle analysis results in eco‐friendly green buildings within a broader sustainability concept.

Without doubt, we live in a challenging era for the construction industry, or are there too many changes in a short time? Important is to look to these changes as an opportunity, to build in a more efficient and smart way: When the wind of change rises, some people build a screen and others a wind turbine.

The COVID‐19 pandemic also has drawn our attention to the societal impact of engineering. Interdisciplinary engineering approaches will gain more importance and even more important will be the interaction with the social sciences.

Last but not least, we should also think about the future of our journal as a valuable source of information for fib members and the concrete world in general. How can we make our journal Structural Concrete resilient towards all new kinds of online solutions, social media networks, knowledge creation and updating from big data, etc.?

Let me end these reflections by quoting Darwin: It is not the strongest of the species that survives nor the most intelligent. It is the one most adaptive to change.

混凝土结构的回弹力是2020年上海国际小聚论坛的主要主题，在这篇社论中，我对当时的在线主题演讲做了一些反思。我希望这些思考可以为建筑业的未来，尤其是结构混凝土的未来提供一些思考。

弹性源自拉丁语resilio，意为突然或逐渐发生的冲击后退或反弹。从严格的结构意义上讲，我们可以考虑与震级事件（例如爆炸，地震，火灾等）相关的系统的弹性，这些弹性可以与鲁棒性和冗余性联系在一起。关于系统或社会抵御气候变化或流行病的能力，也可以考虑应变能力。

进一步的步骤是着眼于我们的社会和行业在数字化方面的弹性。我们不能否认数字化对我们日常生活的巨大影响，其特点是高度的互连性和惊人的高速信息交换。物联网（IoT）是一个物理对象网络，嵌入了传感器，软件和其他技术，目的是通过互联网与其他设备和系统进行数据连接和交换。当然，这种物联网也带来了一些威胁，网络安全已成为热门话题。IoT的例子是智慧城市，其中通过使用数字和通信技术来提高城市的弹性和可持续性，从而使传统网络和服务更加高效。

近年来，人工智能（AI）迅速发展，包括机器学习和深度学习。结合出现在建筑工地上的无人机和嵌入式传感器，AI可以对现有结构进行优化评估和升级。所有这些新发展在工业中的实施通常称为工业4.0，即第四次工业革命。

从某种意义上说，COVID-19大流行也将对建筑业产生破坏性影响，将加速已经发生的转变。我们将发展成为越来越多地使用模块化组件，自动化制造，支持现场执行的机器人技术以及数字化计划和生产的生产系统。正如我们在预制混凝土行业中所经历的那样，所有这些趋势无疑将提高生产率。

我们还看到虚拟现实和增强现实出现在建筑工地上，从而产生了完全交互式的3D体验，从而提高了建筑环境的质量。

BIM允许创建建筑物的虚拟模型，该模型由动态和智能的虚拟建筑物组件组成，其中包含有关其身份和几何形状的信息。BIM模型中存储的信息可以通过多种方式从中提取：以平面图，剖面图，3D视图，工程量清单，估计，空间布局，日光研究等形式。

在全球范围内，我们看到了3D打印的应用程序，它在定义混凝土组件的形状方面具有完全的灵活性，甚至可以适应于优化的力流，从而在概念设计中提供了更多的自由度。

在过去的几十年中，混凝土从基本的建筑材料发展成为具有不同程度的替代粘结剂的量身定制的多组分胶凝材料。完整的生命周期分析可在更广泛的可持续性概念内实现绿色环保的建筑。

毫无疑问，我们正处于建筑行业充满挑战的时代，还是在短时间内发生太多变化？重要的是，应将这些变化视为机遇，以更高效，更明智的方式进行构建：当变化的风潮升起时，有些人会建立一个屏障，而另一些人会建造一个风力涡轮机。

COVID-19大流行也引起了我们对工程技术的社会影响的关注。跨学科的工程方法将变得越来越重要，与社会科学的相互作用将更加重要。

最后但并非最不重要的一点是，我们还应该考虑将期刊的未来作为fib成员和整个具体世界的宝贵信息来源。我们如何才能使《结构混凝土》期刊对所有新型在线解决方案，社交媒体网络，知识创造以及大数据更新等具有弹性？

让我通过引用达尔文来结束这些思考：它不是生存最强的物种，也不是最聪明的物种。它是最能适应变化的一种。