The increasing developmental potentiality for the construction industry brings the huge challenge to make up the limitation of traditional construction project management mode when adapting to the Sustainable Development Goals (SDGs). Due to the high energy and resource consumption for the construction projects, there are a large number of uncertainties and disturbances in achieving resilient urban infrastructure. Studying construction project resilience (CPR) is imperative. However, prior studies preferred to measure resilience by systemic indicators, which are complex and unfriendly. Studying CPR from the perspective of employee behavior (EB) remains rare. Hence, this study proposed a social network analysis (SNA) methodology to overcome the research gap. Firstly, six EBs are identified by the systematic literature review (SLR). Then, the critical employees (CEs) and their interrelationships are investigated to form the social network. Six SNA parameters including density, degree centrality, betweenness centrality, efficiency, constraint, and cliques are selected to model the EBs, namely PMT cohesion, the identity of the project culture, formal behavior between employees, collaboration efficacy, informal social constraints, and reciprocity and mutual trust. Finally, the value of CPR is obtained and the strategies for improving the CPR are proposed from four characteristics: robustness, redundancy, rapidity, and resourcefulness. The findings provided a simple and effective techniques to measure the CPR and could benefit the project manager to improve the CPR by exerting accurate strategies to the EBs in poor performance.

The influence of in-plane and out-of-plane element array effects of honeycomb on the impact characteristics of sandwich panels was studied under different local impact speeds. The numerical model is calibrated by air cannon impact experiment and used to conduct the investigations. It is demonstrated that the sandwich panel with in-plane honeycomb core (SPIH) exhibits a response mode with larger local indentation and smaller overall deflection, and also shows superior energy absorption as compared to the sandwich panel with out-of-plane honeycomb core (SPOH). When facing more severe impact conditions, SPIH shows better anti-penetration capability. When the impact radius is 20 mm and the impact velocity is 83 m/s, the SHOP is penetrated while the SHIP is not. When the impact radius is 20 mm and the impact velocity is 100 m/s, the total absorbed energy of SHIP is 59.79% higher than that of SPOH, and the impact residual velocity is 32.67% lower. Furthermore, the impact mitigation performances of SPIH with different density gradient cores are investigated by comparing their deformation modes and energy absorption characteristics. The results indicate that different gradient schemes enable sandwich panels to perform multiple functions. The positive gradient design in the cell stretching direction is beneficial to reduce the overall deflection and improve the energy absorption effect.

Thin‐walled cellular structures deliver ultralow density and high specific strength for damage‐tolerant components. Yet periodic lattices may hard‐wire repeating weak features that promote tensile‐catastrophic fracture, whereas aperiodic networks erase this threat by relinquishing geometric modulation. In this work, a quasi‐periodic Dart‐Kite metastructure (QDK) is built, inspired by the order‐disorder synergy of skeletal muscle. Its golden‐ratio‐constrained geometry forms an intrinsic network of strong and weak bonds, enabling simultaneous improvements in strength, toughness and damage tolerance. QDK substantially surpasses the periodic structure, increasing initial fracture resistance and fracture energy by 211% and 133%, and achieving 1.7× higher cyclic energy absorption. These gains arise from a dispersed stress field generated by the diverse unit orientations and connectivity, which enlarge the plastic zone and promote crack deflection, branching, and arrest. Mechanical performance and crack trajectories remain robust across orientations (<2.5% variation). Introducing architected weak bonds, serving a role similar to the muscle Z‐line, provides controllable fracture pathways while preserving structural performance; notably, toughness rises further, with QDK‐D2 achieving a 24% increase. These features establish quasi‐periodicity as a design principle that unlocks the simultaneous realization of mechanical programmability and high fracture resistance, enabling tunable high‐toughness performance across both general and failure‐specific scenarios.