Utilization of solid waste as building material (USB) is a promising strategy that effectively addresses the challenges of safety and environmental pollution posed by solid waste and alleviates the scarcity of natural resources to facilitate the sustainable production of building materials. However, USB implementation and promotion have not yet matured in China because of various barriers. Therefore, this study employed the GT-DEMATEL-ISM-MACMIC model to identify the critical factors in USB implementation and examine the interactions and relationships among barriers to propose targeted recommendations. The results identified 33 barriers and revealed a distinct causal hierarchy. It was found that the macro-level barriers at the apex of the hierarchy, ‘incomplete policies and legislation’, ‘poor supervision and regulation of solid waste’, and ‘insufficient financial subsidies and incentives’, are critical barriers to USB implementation. A key outcome of this study is the identification of the most critical and obstinate barrier path evolution in USB implementation, where incomplete policies and regulations (P1, P2) lead to underdeveloped markets and capital (M6, E2), as well as low stakeholder motivation (S4), which in turn, exacerbates policy inertia and traps USB development in a state of deadlock. Conversely, detail-level barriers at the technical and managerial levels, such as ‘limited innovation in management models’ and ‘single type and limited application of renewable building material’, tend to be less influential than other barriers. Therefore, USB promotion can be achieved by strengthening policies and legislation, improving policy systems, and increasing financial subsidies. The results of this study will assist China and other developing countries in identifying critical barriers to USB implementation, offer practical approaches for promoting USB implementation, and provide methodological guidance for similar studies.

The excessive vibration or collapse of a transmission tower-line (TTL) system under seismic excitation can result in significant losses. Viscoelastic material dampers (VMDs) have been recognized as an effective method for structural vibration mitigation. Most existing studies have focused solely on the dynamic analysis of TTL systems with control devices under deterministic seismic excitations. Studies focusing on the nonstationary stochastic control of TTL systems with VMDs have not been reported. To this end, this study proposes a comprehensive analytical framework for the nonstationary stochastic responses of TTL systems with VMDs under stochastic seismic excitations. The analytical model of the TTL system is formulated using the Lagrange equation. The six-parameter model of VMDs and the vibration control method are established. Following this, the pseudo-excitation method (PEM) is applied to compute the stochastic response of the controlled TTL system under nonstationary seismic excitations, and a probabilistic framework for analyzing extreme value responses is developed. A real TTL system in China is selected to verify the validity of the proposed method. The accuracy of the proposed framework is validated based on the Monte Carlo method (MCM). A detailed parametric investigation is conducted to determine the optimal damper installation scheme and examine the effects of the service temperature and site type on stochastic seismic responses. VMDs can effectively suppress the structural dynamic responses, with particularly stable control over displacement. The temperature and site type have a notable influence on the stochastic seismic responses of the TTL system. The research findings provide important references for improving the seismic performance of VMDs in TTL systems.

Shape memory alloy dampers (SMADs) are widely applied in structural vibration control due to their excellent superelastic properties. However, there has been no research on the random wind-induced vibration control of transmission tower-line (TTL) systems with added SMADs. To address this gap, this paper proposes an analytical framework for the wind-induced vibration control of TTL systems with SMADs under random wind loads. An analytical model for the coupled TTL system is developed. The constitutive relationship of the SMAD is derived using the statistical linearization method, and a vibration control approach for the TTL-coupled system with SMADs is proposed. The vibration response of the TTL–SMAD system under random wind loads is derived, and an extreme response analysis framework based on the first exceedance failure criterion is established. The results show that the optimal installation scheme for the SMAD achieves a vibration reduction of more than 30%. When the damper’s stiffness coefficient is approximately 1, the SMAD effectively controls the vibrations. Moreover, a service temperature of 0 °C is found to be the optimal control temperature for the SMAD. These findings provide important references for the application of SMADs in the vibration control of TTL systems.