This study applied machine learning to predict and optimize the hygrothermal performance of bamboo-woven mud walls， highlighting their potential in addressing environmental challenges. Generative adversarial networks （GANs） were first used to augment limited experimental data， addressing small-sample constraints. A back propagation （BP） neural network was employed to analyze and predict the performance of the wall materials. After optimization via a genetic algorithm （GA）， the model’s R² improved to 0.77， indicating significantly enhanced predictive performance. These findings confirm the feasibility of using machine learning in the reuse of traditional building materials and provide a digital theoretical basis and technical support for the preservation and renewal of bamboo-woven mud walls.

Dovetail profiled steel sheets are characterized by a unique rib configuration that ensures a flat plate surface. Compared with conventional flat steel plates， they offer higher buckling resistance， greater out-of-plane stiffness， and more effective interaction with concrete. These superior properties render them well-suited for enhancing the mechanical properties of wall claddings， lateral force-resisting components， and steel-concrete composite structures. To clarify their in-plane shear mechanism， pure shear diagonal loading tests were conducted on two dovetail profiled steel sheet specimens： DPS-V with vertically oriented ribs and DPS-D with ribs inclined at 45°. Experimental observations were focused on buckling modes， deformation evolution， and failure modes， while finite element analysis （FEA） was employed to further elucidate the underlying working mechanism. The results indicated that the profiled ribs provided effective boundary restraint to the plate strips， thereby inhibiting global penetrating buckling. Both specimens exhibited localized buckling within the plate strips， with DPS-V undergoing shear buckling and DPS-D experiencing compressive buckling. Owing to the boundary restraint provided by the ribs， the plate strips were capable of developing post-buckling strength； however， the tensile effect induced by the formation of local tension fields ultimately led to flexural-torsional instability of the ribs， resulting in overall failure. The shear resistance of DPS-V was primarily provided by the plate strips， whereas that of DPS-D was derived from the combined action of the plate strips and ribs， exhibiting significant anisotropic behavior—its bearing capacity under diagonal tension was 38% higher than that under diagonal compression. Although the initial stiffness and ultimate bearing capacity of DPS-V were slightly lower than those of DPS-D， DPS-V demonstrated superior ductility and deformability beyond the peak load. Based on the superposition principle， design formulas for predicting the shear capacity of the two types of steel sheets were proposed. The relative error between the calculated and experimental values was within 4%， providing a reliable reference for the engineering design of such components.

The stop-hole method is a commonly used technique for repairing fatigue cracks of steel structures in engineering practice； however， it suffers from issues such as unreliable repair effectiveness and damage to the cross-section. By combining externally bonded CFRP plates with the stop-hole to form a combined repair method， the limitations of a single method can be compensated for， achieving efficient repair of fatigue cracks. To investigate the enhancement effect of CFRP plates on stop-hole repair， a numerical analysis of the fatigue performance was conducted on single-edged cracked steel plates repaired with combined stop-hole and CFRP plate， based on the local stress-strain approach and fracture mechanics theory. A two-stage fatigue life assessment method for combined repaired steel plates was established and validated through comparisons with existing experimental studies. The results showed that， compared with the stop-hole repair， the combined repair method significantly reduced the stress around the hole edge and the stress intensity factor after crack re-initiation， thereby delaying crack propagation and significantly reducing the crack growth rate. Compared with CFRP plate repair， the combined repair method provided additional crack initiation life， demonstrating its high repair efficiency.

Asphalt pavement joints are prone to distresses such as cracking， faulting， and water infiltration. Existing studies mainly focus on material modification and construction techniques， while systematic design of joint components in asphalt layers remains limited. To improve the structural integrity and service performance of pavement joints， this paper proposes a novel joint component with a telescopic double-tube structure and establishes the corresponding construction technology system. First， based on the principle of load transfer and deformation coordination， a telescopic structure with square steel tubes was designed， and its load transfer efficiency under different parameter combinations was analyzed using the finite element method. Second， field monitoring was conducted on an in-service expressway to investigate the strain response of the component under coupled traffic loading and temperature effects. Finally， the construction process and key control measures were summarized. The results showed that the proposed component exhibited excellent load transfer capability and deformation adaptability， with a load transfer coefficient exceeding 0.88 and a low degree of dispersion. Field monitoring results verified its stable mechanical properties， and its strain response was highly consistent with temperature variations and traffic load distribution. The proposed construction method ensured installation accuracy and long-term durability.

To address the safety disturbance caused by urban rail transit construction to adjacent tall structures， this study conducted a systematic structural safety assessment on a TV tower in the context of construction adjacent to a metro transfer station and a shield tunnel. Field structural inspection， long-term deformation monitoring， and three-dimensional numerical simulation were integrated to assess the current condition of the TV tower structure， the evolution patterns of horizontal and vertical foundation displacements， and the inclination characteristics of the tower body. These methods also accurately quantified the impacts of metro foundation pit excavation and shield tunnel construction on the tower's foundation and superstructure. The results showed that the current concrete strength of the TV tower meets the design requirements， with a historically accumulated foundation inclination ratio of 1.3‰. Numerical simulation predicted that subsequent construction would increase the inclination ratio by 0.31‰， resulting in a total inclination ratio of 1.61‰， which still meets safety requirements. Based on these findings， targeted deformation control standards and engineering recommendations were proposed.

The external thermal insulation composite system （ETICS） is crucial for improving building energy efficiency and ensuring building functionality. In recent years， issues such as cracking， hollowing， peeling， and high-altitude falling have occurred frequently， posing a significant threat to public safety. A systematic review was conducted on domestic and international research and engineering practice regarding diagnosis and treatment methods for detection， evaluation， and repair of building ETICS. In terms of detection， non-destructive testing techniques were categorized into four types based on their energy forms and physical mechanisms， namely optical， thermal， electromagnetic， and acoustic. The research progress of various non-destructive testing techniques and commonly used destructive testing techniques was systematically reviewed. A comparative analysis was conducted on the technical points， advantages and disadvantages， and applicable scenarios of various detection techniques. In terms of evaluation， the characteristics and progress of existing evaluation methods were summarized from three aspects： qualitative evaluation， quantitative evaluation， and comprehensive evaluation. In terms of repair， the current development status of existing repair methods was introduced from the perspectives of repair technology， repair materials， and repair strategies. Finally， the deficiencies in the research and engineering practice regarding diagnosis and treatment methods for building ETICS were analyzed， and future research directions were discussed.

This paper introduces the U.S. standard system for existing buildings， analyzes the seismic evaluation techniques， and focuses on the FEMA P-154-2015 rapid visual screening method and the ASCE/SEI 41-23 three-level evaluation process. The United States adopts a grading mode characterized by “graded screening， differentiated evaluation， and targeted reinforcement” for the governance of existing buildings. This mode offers the advantages of flexibility and high efficiency， while also having certain limitations. By comparing the standards of the two countries and considering China's actual conditions， this paper proposes recommendations， such as defining benchmark buildings to simplify the evaluation process and improving performance-based assessment methods to complement traditional appraisals. It aims to provide technical references for construction projects under “the Belt and Road” initiative， thereby offering insights for the scientific and standardized management of existing buildings as well as for urban renewal.

The To elucidate the propagation laws of vibrations generated during the operation of variable-frequency equipment and the influence of such vibrations on building structures， an engineering project incorporating such equipment was investigated through field vibration measurements. Vibration response data were collected at the equipment source， along multiple propagation paths， and on different floors of the building， enabling an examination of the effects of excitation frequency， propagation distance， and spatial direction. The results indicated that the vibration propagation in soil exhibited obvious frequency-dependent characteristics， with the vertical acceleration transmissibility decreasing as the operating frequency increased. Notably， the vibration propagation showed significant directional anisotropy， with the horizontal transmissibility 30% to 50% higher than the vertical one. Vibration amplitude decayed approximately exponentially as the propagation distance increased. Based on the measured data， a quantitative relationship between vertical acceleration transmissibility and propagation distance considering excitation frequency was established. The relationship revealed that vibrations attenuated to the ambient background level at a distance of approximately 200 to 220 m from the vibration source. The vibration distribution inside the building was jointly governed by floor height and structural configuration， and distinct floor vibration response characteristics in different directions were observed due to differences in structural stiffness.

The Shenzhen local standard， Technical Standard for Green Demolition of Buildings， was issued and implemented on January 31， 2025， by the Shenzhen Municipal Standards Committee. Based on this newly compiled standard， the definition， framework， application objectives， and demolition technologies for green demolition were analyzed； the current development status of building demolition methods was summarized and evaluated； and the principles for preparing a special green demolition scheme， which balances the goals of structural dismantling safety and comprehensive utilization of demolition waste， were elaborated. Furthermore， a practical application of the standard was carried out in a building demolition project in the Xinqiao East Area urban renewal project in Shenzhen. The results showed that the technical guidelines established in the standard enabled classified and orderly demolition of existing buildings， leading to classified and graded comprehensive utilization of demolition waste. This achieved an on-site utilization rate of 30% and a comprehensive utilization rate of 100% for the demolition waste， thereby improving the comprehensive utilization level and resource recovery efficiency of the project’s demolition waste. This established a technical paradigm for green demolition of buildings and provided a basis for the promotion and application of green demolition technologies.

In order to accurately separate the contributions of foundation settlement and structural damage to the deformation of port approach bridges and realize the physical attribution of structural damage， an integrated framework of "multi-source perception–physical modeling–deviation diagnosis" was adopted to develop a synergistic method combining time-series PS-InSAR-based foundation settlement monitoring， high-resolution optical image shadow analysis， and BIM-based parametric mechanical modeling. First， under a unified spatiotemporal datum， time-series PS-InSAR technology was applied to extract the foundation settlement field， while an improved Normalized Shadow Index （NSI） was used to invert the relative deformation at the tops of bridge piers. Second， an LOD350-level BIM model was converted into a parametric beam-grid mechanical model， and foundation settlement as well as thermal loads were taken as inputs to calculate the theoretical deformation response. Finally， a Damage Risk Index （DRI） was constructed to quantify the deviation between monitored and theoretical deformations， enabling damage early warning and localization. Closed-loop verification was further performed using an actual engineering case. The results showed that the proposed method achieved a mean absolute error （MAE） of approximately 1.14 mm and a root mean square error （RMSE） of approximately 1.46 mm in deformation monitoring， with 88% of data points having an error no greater than 2 mm and a damage identification accuracy of 93.7%. This method also supports the full-chain diagnostic process of "large-scale early warning – localized positioning – on-site verification – repair validation". It is concluded that this method effectively overcomes the limitations of single remote sensing techniques in interpreting deformation causes， achieves the transition from "phenomenon perception" to "mechanism interpretation"， and thus provides a reliable technical paradigm for the intelligent operation and maintenance of long linear steel-structure infrastructures such as port approach bridges.