Steel diagrid high-rise structures require repeated finite-element analyses to accurately predict the multi-directional displacements, which is a time-consuming approach for parametric exploration and early-stage design. This paper presents an artificial neural network (ANN) – particle swarm optimization (PSO) informed model for predicting multi-directional displacements of high-rise steel diagrid frames considering different parameters including the number of storeys (NS), diagrid angle (DA), cross-sectional area (CSA), total weight (TW), and mass of the diagrid exterior (MDE). The model was developed from a dataset of 360 simulations from SAP 2000 ranging from 20-80 storeys and 33.69°-90° angles was used to create a Levenberg-Marquardt (LM) ANN with hyperbolic tangent sigmoid (HTS) activation function and 11 hidden neurons. The PSO was integrated into the model to enhance the training by optimizing the weights and biases (WB) of the network. The ANN-PSO achieved excellent model performance results with R values ranging from 0.9931 to 0.9989 and mean squared error (MSE) ranging from 0.000380 to 0.017200. The sensitivity analysis (SA) utilizing Garson's algorithm (GA) revealed that the number of storeys and diagrid angles are primary influencing the X and Y-displacements while the total weight and cross-sectional area were the leading influential factors to the Z-displacement. The proposed ANN-PSO offers an accurate, interpretable and computationally efficient approach for performance-based preliminary design of steel diagrid high-rise structures.

Post-disaster reconstruction projects (PDRP) are integral to ensure that a community will recover and return to normal after a major disaster. The project team success (PTS) in PDRPs is essential to ensure that post-construction efforts will be effective and attain its objective of recovery in the community. An Artificial Neural Network (ANN) model was established considering several factors including post-disaster reconstruction project including project manager's leadership style (PMLS), multi-disciplinary project competence (MDPC), project manager's experience and competence (PMEC), high degree of trust within the project management team (HDTPMT), implementing an effective decision (IAED), effective project control (EPC), competent project manager (CPM), project risk and liability management (PRLM), motivated and well-integrated team (MWIT), and team composition (TC). The governing ANN model has a topology of 10-3-1 network structure and showed good performance with correlation plot (R) of 0.99850, MSE and MAPE of 0.00135 and 0.40559, respectively. The relative importance (RI) of the input parameters (IP) was also determined utilizing the connection weights (CWs) via Garson's algorithm (GA). The findings showed that the MWIT factor is the most influential factor (MIF) to project team success in PDRPs. The results in this study could be utilized to focus on improving areas to guarantee the success of PDRPs.