Architectural accidents caused by differential settlement of foundation occured regularly in countries. In order to better understand the influence law on upper frame structure caused by differential settlement of foundation and reduce the occurrence and damage of accident in frame structure, this paper systemically summarize the influence law of internal force and deformation on upper frame structure caused by differential settlement of foundation, which provided important reference value for the design and reinforcement of frame structure.
The safety state of road network in the bridge-tunnel groups is an important factor in evaluating road traffic safety. This article describes a case study simulating brittleness behavior of road traffic safety statue in the bridge-tunnel groups. First, the safety state of road network and brittleness behavior characteristics are analyzed; second, the relationship between brittleness behavior and safety entropy is also introduced, and the collapse process of the travel system of road traffic network in the bridge-tunnel groups is simulated, which is based on the adaptive agent digraph theory. Finally, the rear-end accident data from Liu'an mountainous freeway are verified through the reasonability and feasibility of adaptive agent digraph theory. The case study has shown that there is a certain delay in the collapse of whole system; the key of vertex collapse will lead to the collapse of the whole system in a short time; the initial value of each vertex has a significant impact on the collapse of the whole system. The findings in this study provide scientific guidance to potentially improve the current mountainous freeway design and traffic management policy.
The foamed plastics are not bio-degradable and not readily recyclable. How to substitute new foamed buffer materials with lower pollution for foamed plastics became a popular research topic. The paper discussed the effects of microwave power, natural bonding agent, lubricating agent and crosslink agent on foamed buffer material with fibers of old newspaper and inorganic foaming agent. The result showed that increasing of microwave power could be beneficial to decrease the molded time and density of foamed buffer material with fibers of old newspaper. The best foamed properties were achieved with proper dosage of natural bonding agent like wheat flour, glyceryl monostearate sodium borate at the microwave power of 575W.
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