The low-cycle fatigue behavior and energy dissipation capacity of the welded I-section bracing members with different geometry properties are investigated by 21 pin-ended bracing tests under axial harmonic cyclic loading with constant amplitudes of 6 times the tension yield deformation of specimens.
The test results indicate that the strengthening mode has little influence on wall deformation,wall rigidity and its degeneration,whereas it has obvious influence on the energy dissipation capacity of the wall.
Based on the tests of 23 SRC columns and 3 RC columns subjected to constant axial compressive loading and reversed cyclic or monotonic horizontal loading, the failure patterns, deformation capacity, energy dissipation capacity, strength degradation, hysteretic model, cumulative damage indexes of such SRC members are analyzed inthis paper. Furthermore, the corresponding computing formulas are proposed as well.
The research results indicate that the reasonably setting boundary element can discretize the plastic damage area,enhance the horizontal bearing capacity,and improve the seismic energy dissipation capacity.
Based on the quasi-static test of three full-scale interior RC beam-column joints and two 1∶2.5 models of the RC frame which has two spans and two levels,the effectiveness of the scheme was examined in aspect of hysteretic behavior,shear deformation of joint cores,energy dissipation capacity,strength and stiffness degradation.
Research and practice show that enhancing the strength,ductility and dissipation capacity of the structure by using steel reinforced lightweight aggregate concrete is an effective way to improve the seismic resistance.
As an important energy dissipation component in coupled shear wall structuresand the structure system composed by coupled shear walls, the strength, ductility andenergy dissipation capacity of the coupling beams have significant influence on theperformance of the whole structure system under earthquake excitation.
The Ispara earthquake record with different peak values is used to load the specimens. The acceleration response, displacement response, hysteretic characters, stiffness and energy dissipation capacity are analyzed.
It emphasizes the experiments ofthe web steel structure residence system in our country and analyses the results of the experiments, draws the models' hysteresis curve, studies the models' hysteresis behavior and dissipation capacity. It also hopes that this essay can lay the foundations of the later research of the web steel structure residence system.
Although Festuca arundinacea and Lolium perenne had higher energy dissipation capacity indicated by a higher qN than two other species did,their lower qP and ФPSⅡ suggested that they had more susceptibility to photoinhibiton under strong irradiance resulting in the decrease of ETR.
The experimental results show that the seismic behavior of strengthened joints is improved significantly by the scheme,which successfully enhances the shear capacity by about 22%,transforms the failure mode to be ductile,raises the ductility coefficient over 4,delays the strength degradation and stiffness degradation, and upgrades the energy dissipation capacity.
The cracking and damage patterns, strength and stiffness degradation and deterioration, energy dissipation capacity and hysteretic feature are analyzed.
The acquisition of considerable energy-dissipation capacity under vibration conditions by this steel is quite stable, and continues to hold on subsequent cyclical loading, even for stresses much smaller than the fatigue limit.
Whenever thermal homeostasis disturbed, the heat load exceeds heat dissipation capacity, which alters the cutaneous vascular responses along with other body physiological variables.
An air cooling heat dissipation system of high-speed cylindrical grinding machines for decreasing lubricating oil temperature of grinding wheel spindle bearings is described. It has been found from an approximate calculation of the heat dissipation capacity and the test results that such a system is effective.
In order to understand the seismic behavior of the gravity platform, two of the same reinforced concrete models were tested,The main aspects such as the failure mode, the strength, the ductility and the energy dissipation capacity of the model structures were investigated and the primary experimental data were obtained for the seismic design of the gravity platform. It is concluded that the well designed gravity platform could be an excellent earthquake-resistant structure.
Eight half-size exterior beam-column subassemblies under reversed clylic loading were tested. The effects of the prestressing force on strength, stiffness and energy dissipation capacity of beam-column assemblies were observed. The problem of beam bar slippage was also investigated. Based on the results, some recommendations are suggested.