Hmmpfam is a widely used computation-intensive bioinformatics software for sequence classification. This poster describes a new parallel implementation of hmmpfam on EARTH, which is an event-driven fine-grain multi-threaded programming execution model. The comparison results of the original PVM implementation and our implementation shows notable improvements on absolute speedup and scalability. On a cluster of 128 dual-CPU nodes, the execution time of a representative testbench is reduced from 15.9 hours to 4.3 minutes.

Due to the increase of the diversity of parallel architectures, and the increasing development time for parallel applications, performance portability has become one of the major considerations when designing the next generation of parallel program execution models, APIs, and runtime system software. This paper analyzes both code portability and performance portability of parallel programs for finegrained multi-threaded execution and architecture models. We concentrate on one particular event-driven fine-grained multi-threaded execution model-EARTH, and discuss several design considerations of the EARTH model and runtime system that contribute to the performance portability of parallel applications. We believe that these are important issues for future high end computing system software design. Four representative benchmarks were conducted on several different parallel architectures, including two clusters listed in the 23rd supercomputer TOP500 list. The results demonstrate that EARTH based programs can achieve robust performance portability across the selected hardware platforms without any code modification or tuning.

e purpose of this paper is to report on the development of a three-dimensional (3D) creep calculation method suited for use in analyzing long-term deformation of long-span concrete girder bridges. Based on linear creep and the superposition principle, the proposed method can consider both shear creep and segmental multiage concrete effect, and a related program is developed. e effects of shear creep are introduced by applying this method to a continuous girder bridge with a main span of 100 m. Comparisons obtained with the nonshear case show that shear creep causes long-term deformation to increase by 12.5%. Furthermore, the effect of shear creep is proportional to the shear creep coefficient; for a bridge with different degrees of prestress, the influence of shear creep is close. Combined with the analysis of a continuous rigid bridge with a main span of 270 m, the results based on the general frame program suggest that shear creep amplification is multiplied by a factor of 1.13-1.15 in terms of longterm deformation. Moreover, the vertical prestress has little effect on shear creep and long-term deformation. e 3D creep analysis shows a larger long-term prestress loss for vertical prestress at a region near the pier cross section. e relevant computation method and result can be referenced for the design and long-term deformation analysis of similar bridges.

For advantage of economical and practical construction, precast T-shape girder bridge is commmonly used in China. In recent years, damage of diaphragm became a serious problem in operation and maintenance. In this study, based on finite element (FE) analysis of an actual bridge, stress distribution and failure process of diaphragm is demonstrated. The result shows that the stress of middle diaphragms started to beyond the limit firstly, under heavey load of 1.5 times equivalent Grade highway-I live load. Then, method of Double-K brace to strengthen the transveral connnection of the exist bridges is proposed and applied on background bridge. Based on the field test, tensile stress of diaphragms concrete reduced 69.4% when Double-K brace were adopted, and the lateral integrity of precast T-beam bridge could be improved effectively.

Extra-dossed bridges, also known as low-pylon, cable-stayed bridges, have been developed and applied widely in recent years. In cable-stayed bridges, pylon-anchorage is critical for reliable connections between the cable and the pylon. For extra-dossed bridges, the pylon cross-section is small and the anchorage zone is limit. Saddle type pylon-anchorage, a new connection type, overcomes the shortcomings. In this study, based on an actual extra-dossed bridge, Nanpanjiang Bridge, a fullscale segment model is cast to test the anti-slip capability of saddle type pylon-anchorage. First, the structural details and model dimensions are illustrated, and a practical formula is derived for the computation of parameter , the friction coefficient between the strand and the sub-wire tube. Then, parameter is tested based on the cable force passed from jack loading, which indicates the construction stage. Finally, epoxy mortar is poured into the anchor, which is consistent with the normal operation stage of the bridge, and the effect of epoxy mortar is examined to ensure that the anchorage has sufficient anti-slip capacity. The results of the experiment show that during construction, the friction coefficient is between 0.054 and 0.064, and according to the classification loading test, the friction coefficient increases as the cable force increases. After the external anchorage is sealed, the anti-slip capacity is sufficient for operation, and the simplified method of computation can be referenced for similar engineering.