In this paper，the characteristics of structural response and modal parameters of Shenzhen New World Center （height 238 m） are analyzed based on the field data during five typhoons in the last 10 years. The field results are further compared with the wind tunnel test results when the roughness exponent α is 0.22，0.30 and 0.35 respectively. The field results show that the building exhibits obvious crosswind vibration when reaching its maximum vibration amplitude，and the corresponding vibration is in the north-south direction. The measured maximum acceleration is 17.28 cm/s²，which meets the requirement of residential comfort. During the five typhoons，the modal frequencies are shown to be evidently amplitude dependent and time-varying，and it is more reasonable to describe the variation of modal frequency with time than the variation with amplitude. The modal frequency first decreases with time and reaches its minimum at the peak wind speed，and then returns to the normal value. The modal damping ratios tend to be scattered in the middle- and low-amplitude region，and rise slightly with increase in the amplitude. The maximum damping ratios in the alongwind and crosswind directions are 1.9% and 1.2%，respectively. The wind tunnel test results for α=0.35 are in good agreement with the field measured results，indicating that the wind tunnel test results for terrain category C are conservative.

Base-isolation system would undergo considerable great displacement subjected to strong earthquake. According to recent research progress，the hybrid control strategy combining variant tuned mass damper （VTMD） with base-isolation system has been proved to be effective in reducing such great displacement demand. However，large tuned mass is required to achieve better control performance，which may be difficult to realize in practical application. Employing the mass-amplification effect of the inerter device，a variant tuned mass damper inerter （VTMDI） is proposed in this study by inserting the inerter device in parallel with the dashpot in the VTMD and is attached to the isolation level in the base-isolated structure. Due to the stochastic nature of seismic ground motions，investigation into the optimum design of the VTMDI are conducted based on the framework of random vibration. It is demonstrated that the traditional optimization strategy，taking the inter-story drift of isolated superstructure as the optimization objective，is not cost-effective. Thereby，a novel optimization strategy consisting of two step optimization procedure is proposed. In this two-step optimization strategy，the optimization objective in the first step is taken as the control effect of the base-isolated structure equipped with the VTMDI compared with that of the corresponding base-isolated structure with the same dashpot，and then the optimization objective in the second step is to minimize the inter-story drift of isolated superstructure. And the dynamic time-history analyses show that both optimization strategies can effectively reduce the horizontal deformation in the isolation level and inter-story drift in the superstructure，and the excessive strokes of the tuned mass are also avoided. However，the two-step optimization strategy is more cost-effective than the traditional optimization strategy.

The traditional Tuned Mass Damper （TMD） has many issues，such as large additional mass requirement，limited installation space restrictions and large motion stroke required when the mass block vibrates. Based on the principle of translation-rotation mutual transformation and conservation of kinetic energy，the rotary inertia virtualizing translational mass based Tuned Mass Damper （RTMD） is proposed in this paper. The conceptual design of RTMD control system is carried out，and the motion equation of RTMD control system is established with the reference of a single degree of freedom system. The influence law of RTMD control system parameters on the vibration control effect of structure is analyzed. It is discovered that the control effect is closely related to the system’s physical mass ratio，inertial mass ratio，damping ratio，and such regulations can be applicable to general multiple degrees of freedom systems. The correctness of the design parameters of the RTMD control system and the realizability of the control system are verified by shaking table test of the design model. The results of time domain analysis and frequency domain analysis show that the dynamic response obtained from shaking table test is consistent with the dynamic response of numerical simulation，which verifies the correctness of the established theoretical equations of RTMD control system.

Seismic energy dissipation technology can significantly improve the seismic behavior of building structure. The effect of the damper depends on its effective connection with the main structure，there are few researches on the effective connection design method between the damper and the whole structure at present. In this paper，a cantilever wall structure with a new type of embedded parts is proposed for the intermediate column connection of metal dampers in engineering，and the design method and key points are given. In order to further explore the reliability of the design method and investigate the mechanical properties of the cantilever wall，two specimens were tested under quasi-static unidirectional loading and low-cycle reciprocating loading. The results show that the cantilever wall cracks begin to develop from the joint of embedded parts，and the stress in the corner and the core area of the embedded parts is larger when it is destroyed. Adding hidden beam and hidden column can better improve the load carrying capacity of the cantilever wall. The new embedded parts can be combined with the hidden beam and hidden column to make the cantilever wall bear larger damping force under the condition of small size，and ensure the damper to give full play to the seismic energy dissipation effect.

Considering the complexity of solving the seismic response of the energy-dissipated isolated structure with six-parameter viscoelastic damper under the excitation of Li Hongjing spectrum，a concise solution that can obtain random seismic response is proposed. The analysis model of six-parameter viscoelastic damper with support is adopted，and the mathematical modeling of energy dissipation and isolation structure with viscoelastic damper is realized by differential constitutive equation. Combined with complex mode method and the pseudo excitation method （PEM），the unified expression of frequency domain solution for system series response （displacement，velocity and damper force） of vibration isolation system is obtained. Taking Li Hongjing spectrum as the excitation power spectrum，the excitation power spectrum and the eigenvalue function of structural frequency response are simplified，and the concise analytical solutions of the system response power spectrum，response spectral moment and response variance under the random excitation are obtained. An example is given to verify the accuracy and efficiency of the proposed method in analyzing the dynamic response of the system compared with the traditional response analysis method such as the PEM，and the influence of different support stiffness on the vibration reduction effect of the damper is discussed.

In order to study the seismic effectiveness of the most commonly used support method for fixing figurine cultural relics，the full-scale shaking table tests of the seismic system （two types of figurine replicas with typical size and vulnerable materials and fixed measures of supports） were carried out. The seismic responses of the cultural relic replicas and the interaction between the cultural relic replicas and supports under different working conditions were obtained. The influence of the key body shape parameters of figurines，the clamping position of metal supports，the support size，the installation gap between cultural relic replicas and fixed measures on the movement state of cultural relics was discussed. The seismic effectiveness of support measures was evaluated and reasonable suggestions were put forward. It provided the necessary basis for the optimal design of fixed method for this type of cultural relics with the principle of safety and minimum intervention. The results showed that all the floating figurine replicas were overturned，which had a great risk of damage. The rocking responses of figurine replicas were effectively reduced after independent supports were used for fixation. As the ratio of the center of gravity height to the base width of the figurine replicas increases，along with the increase in their mass，the obvious plastic deformation or even the root fracture occurred in the case of smaller supports，resulting in overturning and damage of figurine replicas. At the same time，with the increase of the size of the supports，the improvement of the fixation effect was limited. Based on the principle of minimum intervention for cultural relics，and considering the seismic safety and the art exhibition，the support size should be optimized. The rocking responses of figurine were controlled to some extent when its shoulder was fixed by the support，however，with the increase of the fixed position，the sliding response of the figurine was more obvious. The surface of the figurine was easily damaged because of the interaction between the support and the figurine. When the gap between the two was filled with silica gel cushion，the rocking and sliding responses of figurine replicas were reduced by nearly 40% and 50% respectively，the strain at the root of the support was reduced by nearly 40%，and the strain at the contact area between the figurine and the support was reduced by nearly 60%，which effectively improved the seismic effectiveness of support measures.

In allusion to inadequate research on damage identification of multi-tiered reinforced soil retaining wall，a large shaking table test of two-tiered reinforced soil retaining wall was carried out. The time domain identification method was used to analyze the dynamic response characteristics of the model under horizontal seismic loading，and the distribution laws of the natural frequency and damping ratio of the upper and lower retaining walls were expounded. The corresponding relationship between the structural damage degree and the natural frequency and damping ratio was explored. The results show that the natural frequencies of the upper and lower retaining walls are basically the same before loading，and the damping ratio decreases with the increase of wall height. With the accumulation of loading conditions，the natural frequency gradually decreases and the damping ratio gradually increases. The distribution curves of natural frequency and damping ratio are fitted by polynomial method. The comparative analysis shows that when the natural frequency decreases by 0~15.41% and the damping ratio increases by 0~299.35%，the structure is basically intact. When the natural frequency decreases 15.41%~18.92% and the damping ratio increases 299.35%~360.07%，the structure is slight damage. When the natural frequency decreases by 18.92%~21.29% and the damping ratio increases by 360.07%~398.21%，the structure is in the middle damage stage； when the natural frequency decreases by 21.29%~29.60% and the damping ratio increases by 398.21%~532.99%，the structure is destroyed.

Aiming at the low accuracy of traditional empirical formulas in complex site environment，a predictive model for peak blasting vibration velocity based on grey wolf optimization support vector regression （PCA-GWO-SVR） with principal component analysis （PCA） feature selection is proposed. Based on the monitoring data of blasting excavation of dam abutment trough on the right bank of Baihetan Hydropower Station，the blasting center distance，maximum single-shot charge quantity，elevation difference，longitudinal wave velocity，bore spacing and bore row distance are selected as input parameters，and the characteristic values are selected by data dimension reduction of PCA，and the six selected features are dimensionally reduced to four characteristics with higher correlation. Support vector regression （SVR） is improved by grey wolf optimization algorithm （GWO） to obtain the optimal parameters. Parameters are input into the SVR model for evaluation. The research results show that the PCA-GWO-SVR algorithm has better agreement with the predicted values and the measured values of Sadowski formula，improved Sadowski formula，SVR，PCA-SVR，GWO-SVR. The predicted results are more accurate and can predict the peak value of blasting vibration of slope more effectively，which provides help for safety control of blasting construction of slope.

Large heavy-duty bearings have special working conditions. Under low speed conditions，the impact duration is prolonged，the system response amplitude is reduced，and the fault information is easier to be covered by noise. Acoustic emission technology has been widely used in the field of structural health monitoring and equipment condition detection because of its sensitivity to weak damage. The spatial localization method in acoustic emission technology can be used to accurately locate faults of large bearing with low speed and heavy load. The localization effect depends on the accurate arrival time of signals. The identification and accurate separation of each acoustic emission event is a major challenge at present. Gate recurrent unit network （GRU） can consider the internal in sequence data and extract temporal correlation features，which has certain advantages in signal processing. Akaike information criterion （AIC） can effectively identify two different stochastic processes. In this paper，an acoustic emission signal time of arrival picking method based on GRU and AIC is proposed. The results based on the lead and test data show that the proposed method has great potential in determining the large，heavy-duty，low-speed bearings acoustic emission signal arrival time by comparing with the traditional AIC，threshold discrimination and short term averaging/long term averaging.

Vehicle-assisted bridge damage identification has great application potential，but it is still difficult to extract damage-sensitive features from multi-source monitoring data and accurately evaluate the bridge damage status. To solve this problem，an Attention-LSTM-based Feature Fusion Model （ALFF-Net） is proposed. The model improves the perception ability of Bi-LSTM cells for multi-scale feature information in time series data through a preset data reconstruction layer. Furthermore，by employing attention mechanism and feature fusion strategy，the model reduces the prediction difficulty of downstream branches of deep neural networks and further improves the modeling ability for the important dependency relationships in the sequence data. A monitoring dataset under different road roughness and vehicle speeds is generated through a vehicle-bridge interaction system simulation，and the bridge damage identification performance of the ALFF-Net model is comprehensively tested. The results show that the ALFF-Net model improves the damage identification accuracy by up to 19.30% compared to the classical LSTM network while significantly reducing computational costs，and the identification errors under different road roughness levels are less than 3%. Moreover，by comparing the identification accuracy of the ALFF-Net model under different data-driven schemes，the robustness of the bridge damage detection results with synergistic multi-source monitoring data is verified.